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The Power Engine of the Trillion-Parameter Computing Era! A Detailed Look at IVS's 12-Phase V-Core Solution During the 2025 Chinese New Year, DeepSeek released its new AI model R1, breaking through China's large-scale model technology boundaries with a trillion-parameter scale, marking the entry of compute-driven artificial intelligence into the deep waters of industrialization. In computing infrastructure centered on GPU, CPU, and Switch chips, multi-phase low-voltage high-current power supplies (multi-phase controller + Smart Power Stage), as the power hub of the "computing engine," are facing severe challenges brought by large model iterations—peak power consumption of computing chips breaking through the kilowatt level, and transient load fluctuations reaching the kiloampere level. To meet customer demands for high power density, high efficiency, and high reliability in multi-phase power supplies, IVS has launched the 12-phase dual-output controller IS6203A, providing an efficient and stable power supply solution for AI computing chips. Core Features Multi-Phase Architecture and Dynamic Management: The IS6203A supports dual-output configuration, with Loop1 supporting up to 12 phases and Loop2 supporting up to 6 phases for buck conversion, providing stable power supply for high-current loads. Its Adaptive Phase Shedding (APS) can automatically adjust the number of active phases based on load: reducing phases during light load to improve efficiency, and increasing phases during heavy load to share current and reduce heat, optimizing energy efficiency and thermal performance. High-Precision Voltage Regulation Chips like GPUs and CPUs have extremely high requirements for voltage stability; tiny voltage fluctuations can lead to system instability or performance degradation. Through precise algorithms and feedback mechanisms, the IS6203A ensures stable and reliable output voltage, achieving an output voltage regulation accuracy of ±0.5%. Programmability and PMBus Interface The IS6203A supports configuration and monitoring of power status via the PMBus interface. Users can flexibly set parameters such as output voltage, current limit, number of active phases, and switching frequency via software, thereby simplifying the design process. Additionally, users can read real-time data on operating status, temperature, etc., facilitating debugging and fault diagnosis. Comprehensive Protection Functions To ensure system safety and reliability, the IS6203A integrates multiple protection functions, including overvoltage protection (OVP), undervoltage protection (UVP), overcurrent protection (OCP), and overtemperature protection (OTP). In case of overvoltage, it automatically prevents the output voltage from exceeding the safe range and damaging the load chip; undervoltage protection ensures the output voltage does not fall below the set value; overcurrent protection limits output current overload; overtemperature protection automatically shuts down the output when the chip temperature is too high to avoid thermal damage. Compatibility with Multiple Communication Protocols and Universal Package The IS6203A integrates multiple communication protocols including PMBus, AVSBus, SVID, and PVID, meeting the requirements of most mainstream chips like GPUs and CPUs. The chip uses a QFN-48 package measuring 6mm x 6mm, and is compatible with products from mainstream manufacturers such as Infineon and MPS, ensuring wider applicability. Key Design Specifications High Reliability After the VCC power supply is turned on, the IS6203A can automatically detect whether the PWM signal is floating. If a floating PWM is detected, the system considers that the corresponding Power stage is not properly soldered, ignores that phase, and allows the remaining phases to operate normally. During actual operation, the IS6203A supports Fault-handling behavior. When a Fault occurs in a particular Power stage, the controller can detect and discard that phase, while the remaining phases continue to operate normally. Below is an example from actual operation where a Power stage triggered OTP. When the first phase triggers OTP, it first pulls Tsen high to 3.3V, while the Power stage stops responding to the controller's PWM signal. Subsequently, it pulls the Imon voltage down to REF=0.8V, meaning Imon=0A. Upon receiving the Tsen and Imon signals, the controller immediately switches the PWM signal to a tri-state. The figure below shows the waveform when the IS6203A triggers OTP protection: High Efficiency The IS6203A supports Adaptive Phase Shedding (APS) functionality, maintaining operation at the optimal number of phases based on the magnitude of the load current. This significantly improves efficiency under light load conditions, while under heavy load, all phases operate fully to sufficiently improve thermal performance design. The waveform diagram below shows the phase number change as load current increases: Under the conditions Vin=12V, Vout=0.7V, using 8-phase operation, Fsw=600kHz, the efficiency comparison curves with Adaptive Phase Shedding (APS) functionality turned ON and OFF are as follows: Under the conditions Vin=12V, Vout=0.7V, using 10-phase operation, Fsw=600kHz, the efficiency comparison curves with Adaptive Phase Shedding (APS) functionality turned ON and OFF are as follows: Fast Dynamic Response The instantaneous dynamic regulation of the IS6203A can adapt to application scenarios with fast load transients at the backend. When the backend load changes rapidly, the voltage change range is small, with a Vpeak-peak value of 214.4mV, fully meeting customer usage requirements. The specific test conditions are as follows: Vin=12V, Vout1=1.8V, LL=0.5 mOhm Istart=60A, Iend=430A, Slew rate=960A/µs Load frequency=2kHz, Duty cycle=50% Cout=7868µF (MLCC: 49\100µF + 16\47µF + 79\22µF + 8\1µF, POSCAP: 1\470µF) High-Precision Current Imon Reporting The figure below shows the Imon reporting curve tested on the IS6203A. The Imon accuracy can reach ±3%, providing precise current monitoring capability. Compatibility Testing The IS6203A can be used with our company's 70A/90A/100A Power stages and also supports the use of mainstream Power stage solutions available on the market. On various main platforms, the solutions that have passed verification are as follows: Test Platform Controller Configuration SPS Result Customer A Domestic 80-core ARM Platform VDD Rail Fsw=600kHz, 10Phase, Non-TLVR, APS ON IS6809A PASS Customer B Domestic ASIC Chip Fsw=800kHz, 7+3Phase, TLVR, APS OFF IS6816B PASS Customer C Customized Switch Fsw=600kHz, 12Phase, Non-TLVR, APS OFF IS6816B PASS
2025-04-10
Chip Recommendation Direct | IVS Power Solutions Empower Domestic Desktop Computers The [Chip Recommendation Direct] column carefully selects power solutions that have been validated by the market. From classic iterations to groundbreaking new products, from high-precision power management ICs to multi-phase parallel optimization, we decode the performance leap of each chip to provide superior power supply and protection solutions for your designs. Driven by the dual forces of accelerating the autonomy of the information technology application innovation industry and the restructuring of the global supply chain, high-end computing platforms impose multi-dimensional, stringent requirements on power supply systems. Taking a certain domestic desktop CPU as an example, with a TDP of 70W under its AVSBus architecture, it presents revolutionary demands for the transient response, dynamic voltage regulation, and energy efficiency optimization of power management chips when supporting multi-core computing and high-intensity load scenarios. IS6202A+IS6809A High-Efficiency Power Supply Solution Positioning: AVSBus Dynamic Voltage Regulation Multi-Phase V-CORE Solution The IS6202A is a dual-loop, mixed-signal multi-phase buck controller specifically designed for CPU voltage regulation. It can control up to 5 phases of power stages synchronously per channel, is compatible with PMBus, AVSBus, and SVID protocols, and can be adapted to meet the voltage regulation requirements of various CPU platforms. The IS6809A is an integrated smart power stage with built-in power MOSFETs and gate drivers, capable of delivering up to 70A output current. IS6202A Dual output, supporting flexible 5+0/4+1 phase configuration 200kHz-2MHz wide frequency domain adaptive regulation Dynamic phase control and intelligent power state switching Fast transient response, ultra-high efficiency IS6809A 3V to 16V wide input voltage range 100KHz-2MHz wide frequency domain adaptive regulation Supports precise current sampling, temperature sampling, and fault alarm functions Efficient power conversion technology with conversion efficiency up to 92% Core Advantages Multi-phase parallel power supply technology, supporting up to 200A continuous current output Conversion efficiency exceeding 92%, reducing overall system power consumption Supports dynamic voltage regulation and power management functions Sixfold protection mechanisms: UVLO/OVP/UVP/OCP/CAT_FLT/Fault Detection IS6608A, Fully Integrated High-Frequency Synchronous Buck Converter Solution Positioning: VDD/VDDQ PMBus-Compatible Parallel Solution The IS6608A provides a compact solution, capable of delivering up to 30A output current per phase over a wide input range. Up to 8 chips can be paralleled to achieve a peak output current of 240A. Typical Characteristics Efficiency can reach over 90% 30A continuous output current and 35A peak current Supports parallel output with dynamic phase number auto-adjustment 0.5% voltage accuracy for load regulation and line regulation Selectable switching frequencies: 400kHz, 600kHz, 800kHz, and 1MHz Supports multiple protection functions including UVLO/OVP/UVP/OCP/NOCP Core Advantages Excellent current sharing and phase interleaving functionality Fast transient response and simple loop compensation Minimizes the use of standard external components IS6605H, High Power Density, High Frequency, Fully Integrated Synchronous Buck Converter Solution Positioning: Ultra-Compact VDD0V9 Power Supply Unit The IS6605H, housed in a 2mm x 3mm QFN package, provides an area-optimized solution capable of delivering up to 6A output current, maintaining high operating efficiency across the output load current range. Input Voltage: 4V -16V, Output Voltage: 0.6V - 5.5V 1μA Typical Quiescent Current (IQ) Programmable Soft-Start Time Efficiency can exceed 90% across the load range Excellent load and line regulation system with 0.5% voltage accuracy Dual Mode Switching: Skip Mode or CCM Mode Selectable switching frequencies: 600kHz, 1MHz, 1.5MHz, 2MHz Built-in open-drain PGOOD signal to indicate chip operating status Core Advantages High integration, minimized volume Proprietary TCOTTM control mode for fast transient response
2025-03-14
Core Solution Direct | Breaking Through the Power Supply Bottleneck in High-Performance Laptops The [Core Solution Direct] column selects power solutions verified by the market, from classic iterations to breakthrough new products, from high-precision power management ICs to multi-phase parallel optimization, decoding the performance leap of each chip to provide better power supply and protection solutions for your designs. Last time, we released 4 high-integration domestic desktop power solutions (IVS Power Solutions Empower Domestic Desktops). This time, based on market applications, we have carefully selected 4 high-power supply solutions. Don't miss out! As the Xinchuang (Information Technology Application Innovation) industry advances further, domestic high-performance laptops are accelerating the leap from technological followership to leadership in key areas. The continuous pursuit of computing power in mobile computing platforms drives performance growth in heterogeneous systems (CPU+GPU+xPU), leading to an exponential increase in system-level power consumption. Figure: Power Supply Challenges for High-Performance Laptops IS6202A+IS6811A High-Efficiency Power Supply Solution Positioning: AVSBus Dynamic Voltage Regulation Multi-Phase V-CORE Solution The IS6202A is a dual-loop, mixed-signal, multi-digital interface 5-phase controller compatible with PMBus and AVSBus protocols, adaptable to various xPU platform voltage regulation needs. The IS6811A is an integrated smart power stage with built-in power MOSFETs and gate drivers, achieving a continuous output current of 30A within a wide input voltage range of 4.5V to 22V. Typical Features IS6202A Dual outputs, supporting flexible 5+0/4+1 phase configuration Dynamic phase control and intelligent power state switching Fast transient response, ultra-high efficiency IS6811A Withstands currents 4 times higher than the maximum operating current, double that of competitors Optimized switch on-resistance and parasitic inductance Supports precise current sensing, temperature sensing, and fault alarm functions High-efficiency power conversion technology with conversion efficiency up to 94% Core Advantages Multi-phase parallel power supply technology, supporting up to 150A continuous current output Supports dynamic voltage regulation and power management functions Focus on efficiency and compact size for laptop applications IS6630A/C/D, Three-Output Switching Converter Solution Positioning: Ultra-High Power Integrated DDR Power Supply Solution The IS6630A/C/D is a fully integrated synchronous switching converter with two internal LDOs, where the Buck can handle up to 10A full-load current. This chip highly integrates the three power rails required for DDR into a single 3mm 3mm 0.85mm QFN package, providing an integrated DDR power solution while occupying minimal space. Typical Features Input Voltage: 4.5V-22V, Output Voltage: 0.6V-3.3V Efficiency can exceed 92% across the load range 10A continuous output current Internally integrated VTT, VTTREF, and VPP LDOs Optional two switching modes for high efficiency and low power consumption Optional 500kHz, 700kHz switching frequencies Differential output voltage sensing and 0.6V internal feedback reference, with ±1% tolerance across the full temperature range Built-in PGOOD signal to indicate chip operating status Supports protection functions like UVLO/OVP/UVP/OCP/NOCP Core Advantages Simple control loop, fast transient response Slope compensation, supports all-ceramic output capacitors Built-in integrator for high output voltage accuracy IS6630A/C/D Typical Application Circuit Diagram IS6302A, Internally Integrates Two Bucks and a Single Load Switch Solution Positioning: High-Power Solution Designed for LPDDR5/4X As a fully integrated switching converter, the IS6302A integrates a 10A VDD2, a 1A VDDQ, and a 1.8V/1A VDD1 load switch. It can continuously output 10A, with a peak current of up to 14A. The VDD1 load switch can provide 1A continuous current with only 2x22uF MLCCs. Typical Features Input Voltage: 3.15V-22V, Output Voltage: 0.9V-1.1V VDDQ output current is 1A, peak current is 3A 1.8V VDD1 peak current is 2.2A VDD2 output current is 10A, peak current is 14A Fast transient response, stable operation using POSCAP/MLCC Fixed 700kHz switching frequency Built-in soft start (SS) and output discharge Supports protection functions like UVLO/OVP/UVP/OCP/NOCP Core Advantages Supports three outputs, internally integrates two Bucks and a single load switch Internally optimized power MOSFETs designed for high efficiency and performance High efficiency, high performance, and a smaller application footprint IS6631A, High Power Density Constant 10A Load Fully Integrated Switching Converter Solution Positioning: POL (Point-of-Load) Solution with 0.6V-12V Output The IS6631A can provide up to 10A of continuous current over a wide input voltage range, with a maximum output voltage of 12V, supporting current limiting in different application modes. Typical Features Input Voltage: 4.5V-22V, Output Voltage adjustable from 0.6V-5.5V and 5.5V-12V Programmable current limit Fixed 700kHz switching frequency Excellent load and line regulation performance, voltage accuracy reaches 1% Output voltage tracking and discharge functions Pre-bias startup, programmable soft-start time Core Advantages Uses TCOT control architecture for fast transient response Integrated slope compensation, output supports all-ceramic capacitor applications Slow integrator to improve output voltage accuracy
2025-07-17
High-Efficiency Overcurrent Protection and Monitoring for Data Centers: Highly Integrated 50A E-Fuse The increasing demands of compute-intensive applications and large-scale data processing require servers and other network equipment to have a stable high-current supply to support high-performance computing. With the significant rise in power requirements, power systems must possess efficient overcurrent protection and monitoring capabilities. Traditional high-current power protection solutions often rely on multiple discrete components. However, in high-power application scenarios, these solutions face challenges such as increased design complexity, excessive space occupation, and maintenance difficulties. To meet the demand for a smaller footprint, the number of components used is continuously decreasing. With product time-to-market shrinking, engineers need ways to simplify designs. IVS provides an innovative solution to address these design challenges. IVS introduces the 50A highly integrated E-Fuse, IS6105A, a chip specifically designed for hot swap protection. It can effectively protect the input from output short circuits and transients. During startup, the output voltage slew rate can be set to limit inrush current. The IS6105A integrates a MOSFET and sense resistor internally and is equipped with a PMBus digital communication interface. It highly integrates power protection, monitoring, and control functions into a single silicon chip. While effectively handling high current loads, it minimizes the number of external components required, simplifying system design. The IS6105A supports a wide input voltage range of 4V to 16V, features current monitoring (IMON), and incorporates a power MOSFET with an RDS_ON of 1.2mΩ. Its advanced on-chip current sensing technology enables fast and accurate current detection. The chip features an internal auxiliary function to discharge external output capacitor energy. When protection is triggered or the enable is turned off, it can reduce the output voltage faster, shut down the downstream circuit, achieve rapid power-down of the load circuit under abnormal conditions, and fulfill the circuit protection function. High Level of Integration The IS6105A integrates the functionalities of many discrete components into a compact 4mm x 5mm package. The chip integrates a comprehensive control function module, a high-precision detection module, and a low-on-resistance, high-speed switching MOSFET. Compared to discrete combinations, this chip can reduce the number of peripheral components, saving design space and cost. Figure: IS6105A vs. Discrete Hot Swap Solution PMBus Protocol Communication Compatibility The IS6105A is compatible with the PMBus 1.3 standard, providing a simple and flexible configuration method, precise system control for circuit boards, and specific monitoring and telemetry technology. The PMBus interface allows programming various parameters such as voltage, current, temperature, and fault parameters, and reading/reporting real-time information. Users can dynamically adjust these parameters to quickly and conveniently integrate power supply information for more efficient power management. This meets the multiple needs of data centers for high current, high-efficiency protection, and system simplification. As shown below, an example of modifying the OVP protection mode via PMBus for the IS6105A: Figure: Setting OVP to LATCH Mode via PMBus Figure: Setting OVP to RETRY Mode via PMBus Comprehensive, High-Precision Current and Voltage Signal Acquisition While supporting reading real-time voltage and current values via the PMBus protocol, the IS6105A utilizes internal high-precision voltage and current acquisition modules to quickly obtain and respond to data such as instantaneous voltage (VIN/VOUT), current (IOUT), temperature (Temperature), and power (PIN). For circuit applications not requiring PMBus communication, the IS6105A can generate a voltage proportional to the device current through an external resistor from the IMON pin to ground, enabling current monitoring and feedback. Figure: VIN Accuracy within ±1% of Full Scale Range Figure: VOUT Accuracy within ±1% of Full Scale Range Figure: Temperature Accuracy within ±3% of Range Figure: PMBus IOUT Accuracy within ±5% of Full Scale Range Figure: Imon Accuracy: ±3% for 10A-50A within Full Scale Range Support for Hot Plug Applications As with many communication infrastructures, high availability and high reliability are key elements in data center system design. Pluggable modules and PCBs (such as servers and storage devices) require protection and control circuits at the power interface, commonly referred to as hot swap control circuits. In hot plug applications, the input can generate extremely high voltages at the moment of insertion, posing a risk of overvoltage breakdown for downstream devices. To prevent instant high voltage from propagating to the E-Fuse's downstream side and damaging components, power-up should be avoided immediately after insertion; it's best to wait for the input voltage to stabilize. The IS6105A allows users to delay chip startup by a preset insertion delay, avoiding the jitter voltage at the insertion moment. From the moment of insertion, a timer starts counting the insertion delay. When the timer finishes counting and power-up conditions are met, VOUT begins a soft start. Introducing an insertion delay via timer counting can effectively prevent the risk of overvoltage breakdown in downstream devices due to unstable voltage at insertion. Figure: IS6105A Hot Swap Startup Schematic Figure: IS6105A Hot Swap Startup Waveform Schematic High-Speed Fault Response To prevent shutdowns caused by load power or device short circuits or overloads, users can set the E-Fuse's maximum current limit via the ISET pin. When a current exceeding the set value is detected, the system will limit the current and start a fault timer. If the current drops to a normal value within the timing period, the chip can promptly exit the OC state and resume operation (OC RECOVER). Conversely, if the current fails to drop below the set value after the timer expires, the chip will disable the current limiting function, pull the fault reporting pin low, and quickly cut off the circuit (OCP). Figure: IS6105A Overcurrent Protection and Overcurrent Recovery Schematic Figure: IS6105A OCP Measured Waveform Schematic For instant high currents with faster rise times and larger values, the IS6105A will immediately trigger SCP protection, responding within 200ns and turning off the FET. After a set time interval, it attempts to self-recover with limited current power-up. If it fails to exit the overcurrent state, the chip will cease power-up attempts and enter latch mode, waiting for the user to manually restart after troubleshooting. Figure: IS6105A Short Circuit Current Schematic Figure: IS6105A SCP Measured Waveform Schematic Ample Safe Operating Area (SOA) As the MOSFET is crucial for E-Fuse operation, its Safe Operating Area (SOA) parameters determine the upper limit of the E-Fuse's electrical performance. A larger SOA means the chip can operate safely and stably over a wider voltage and current range. The figure below shows the SOA of IS6105A. It can be seen that as an E-Fuse supporting a constant 50A load, its limiting current is 110A, providing an extremely ample current margin. Even with momentary high current surges, the IS6105A can still operate normally. To prevent the combined effect of excessive VDS and IDS before MOSFET turn-on from exceeding the SOA, the IS6105A has comprehensive preventive functions. In addition to using soft-start to suppress inrush current, the chip also implements a current limit during soft-start power-up to ensure the MOSFET operates within the SOA. Figure: IS6105A Safe Operating Area (SOA) Chart
2025-12-12
Stay updated with the latest news, product releases and events
The Power Engine of the Trillion-Parameter Computing Era! A Detailed Look at IVS's 12-Phase V-Core Solution During the 2025 Chinese New Year, DeepSeek released its new AI model R1, breaking through China's large-scale model technology boundaries with a trillion-parameter scale, marking the entry of compute-driven artificial intelligence into the deep waters of industrialization. In computing infrastructure centered on GPU, CPU, and Switch chips, multi-phase low-voltage high-current power supplies (multi-phase controller + Smart Power Stage), as the power hub of the "computing engine," are facing severe challenges brought by large model iterations—peak power consumption of computing chips breaking through the kilowatt level, and transient load fluctuations reaching the kiloampere level. To meet customer demands for high power density, high efficiency, and high reliability in multi-phase power supplies, IVS has launched the 12-phase dual-output controller IS6203A, providing an efficient and stable power supply solution for AI computing chips. Core Features Multi-Phase Architecture and Dynamic Management: The IS6203A supports dual-output configuration, with Loop1 supporting up to 12 phases and Loop2 supporting up to 6 phases for buck conversion, providing stable power supply for high-current loads. Its Adaptive Phase Shedding (APS) can automatically adjust the number of active phases based on load: reducing phases during light load to improve efficiency, and increasing phases during heavy load to share current and reduce heat, optimizing energy efficiency and thermal performance. High-Precision Voltage Regulation Chips like GPUs and CPUs have extremely high requirements for voltage stability; tiny voltage fluctuations can lead to system instability or performance degradation. Through precise algorithms and feedback mechanisms, the IS6203A ensures stable and reliable output voltage, achieving an output voltage regulation accuracy of ±0.5%. Programmability and PMBus Interface The IS6203A supports configuration and monitoring of power status via the PMBus interface. Users can flexibly set parameters such as output voltage, current limit, number of active phases, and switching frequency via software, thereby simplifying the design process. Additionally, users can read real-time data on operating status, temperature, etc., facilitating debugging and fault diagnosis. Comprehensive Protection Functions To ensure system safety and reliability, the IS6203A integrates multiple protection functions, including overvoltage protection (OVP), undervoltage protection (UVP), overcurrent protection (OCP), and overtemperature protection (OTP). In case of overvoltage, it automatically prevents the output voltage from exceeding the safe range and damaging the load chip; undervoltage protection ensures the output voltage does not fall below the set value; overcurrent protection limits output current overload; overtemperature protection automatically shuts down the output when the chip temperature is too high to avoid thermal damage. Compatibility with Multiple Communication Protocols and Universal Package The IS6203A integrates multiple communication protocols including PMBus, AVSBus, SVID, and PVID, meeting the requirements of most mainstream chips like GPUs and CPUs. The chip uses a QFN-48 package measuring 6mm x 6mm, and is compatible with products from mainstream manufacturers such as Infineon and MPS, ensuring wider applicability. Key Design Specifications High Reliability After the VCC power supply is turned on, the IS6203A can automatically detect whether the PWM signal is floating. If a floating PWM is detected, the system considers that the corresponding Power stage is not properly soldered, ignores that phase, and allows the remaining phases to operate normally. During actual operation, the IS6203A supports Fault-handling behavior. When a Fault occurs in a particular Power stage, the controller can detect and discard that phase, while the remaining phases continue to operate normally. Below is an example from actual operation where a Power stage triggered OTP. When the first phase triggers OTP, it first pulls Tsen high to 3.3V, while the Power stage stops responding to the controller's PWM signal. Subsequently, it pulls the Imon voltage down to REF=0.8V, meaning Imon=0A. Upon receiving the Tsen and Imon signals, the controller immediately switches the PWM signal to a tri-state. The figure below shows the waveform when the IS6203A triggers OTP protection: High Efficiency The IS6203A supports Adaptive Phase Shedding (APS) functionality, maintaining operation at the optimal number of phases based on the magnitude of the load current. This significantly improves efficiency under light load conditions, while under heavy load, all phases operate fully to sufficiently improve thermal performance design. The waveform diagram below shows the phase number change as load current increases: Under the conditions Vin=12V, Vout=0.7V, using 8-phase operation, Fsw=600kHz, the efficiency comparison curves with Adaptive Phase Shedding (APS) functionality turned ON and OFF are as follows: Under the conditions Vin=12V, Vout=0.7V, using 10-phase operation, Fsw=600kHz, the efficiency comparison curves with Adaptive Phase Shedding (APS) functionality turned ON and OFF are as follows: Fast Dynamic Response The instantaneous dynamic regulation of the IS6203A can adapt to application scenarios with fast load transients at the backend. When the backend load changes rapidly, the voltage change range is small, with a Vpeak-peak value of 214.4mV, fully meeting customer usage requirements. The specific test conditions are as follows: Vin=12V, Vout1=1.8V, LL=0.5 mOhm Istart=60A, Iend=430A, Slew rate=960A/µs Load frequency=2kHz, Duty cycle=50% Cout=7868µF (MLCC: 49\100µF + 16\47µF + 79\22µF + 8\1µF, POSCAP: 1\470µF) High-Precision Current Imon Reporting The figure below shows the Imon reporting curve tested on the IS6203A. The Imon accuracy can reach ±3%, providing precise current monitoring capability. Compatibility Testing The IS6203A can be used with our company's 70A/90A/100A Power stages and also supports the use of mainstream Power stage solutions available on the market. On various main platforms, the solutions that have passed verification are as follows: Test Platform Controller Configuration SPS Result Customer A Domestic 80-core ARM Platform VDD Rail Fsw=600kHz, 10Phase, Non-TLVR, APS ON IS6809A PASS Customer B Domestic ASIC Chip Fsw=800kHz, 7+3Phase, TLVR, APS OFF IS6816B PASS Customer C Customized Switch Fsw=600kHz, 12Phase, Non-TLVR, APS OFF IS6816B PASS
2025-04-10
Chip Recommendation Direct | IVS Power Solutions Empower Domestic Desktop Computers The [Chip Recommendation Direct] column carefully selects power solutions that have been validated by the market. From classic iterations to groundbreaking new products, from high-precision power management ICs to multi-phase parallel optimization, we decode the performance leap of each chip to provide superior power supply and protection solutions for your designs. Driven by the dual forces of accelerating the autonomy of the information technology application innovation industry and the restructuring of the global supply chain, high-end computing platforms impose multi-dimensional, stringent requirements on power supply systems. Taking a certain domestic desktop CPU as an example, with a TDP of 70W under its AVSBus architecture, it presents revolutionary demands for the transient response, dynamic voltage regulation, and energy efficiency optimization of power management chips when supporting multi-core computing and high-intensity load scenarios. IS6202A+IS6809A High-Efficiency Power Supply Solution Positioning: AVSBus Dynamic Voltage Regulation Multi-Phase V-CORE Solution The IS6202A is a dual-loop, mixed-signal multi-phase buck controller specifically designed for CPU voltage regulation. It can control up to 5 phases of power stages synchronously per channel, is compatible with PMBus, AVSBus, and SVID protocols, and can be adapted to meet the voltage regulation requirements of various CPU platforms. The IS6809A is an integrated smart power stage with built-in power MOSFETs and gate drivers, capable of delivering up to 70A output current. IS6202A Dual output, supporting flexible 5+0/4+1 phase configuration 200kHz-2MHz wide frequency domain adaptive regulation Dynamic phase control and intelligent power state switching Fast transient response, ultra-high efficiency IS6809A 3V to 16V wide input voltage range 100KHz-2MHz wide frequency domain adaptive regulation Supports precise current sampling, temperature sampling, and fault alarm functions Efficient power conversion technology with conversion efficiency up to 92% Core Advantages Multi-phase parallel power supply technology, supporting up to 200A continuous current output Conversion efficiency exceeding 92%, reducing overall system power consumption Supports dynamic voltage regulation and power management functions Sixfold protection mechanisms: UVLO/OVP/UVP/OCP/CAT_FLT/Fault Detection IS6608A, Fully Integrated High-Frequency Synchronous Buck Converter Solution Positioning: VDD/VDDQ PMBus-Compatible Parallel Solution The IS6608A provides a compact solution, capable of delivering up to 30A output current per phase over a wide input range. Up to 8 chips can be paralleled to achieve a peak output current of 240A. Typical Characteristics Efficiency can reach over 90% 30A continuous output current and 35A peak current Supports parallel output with dynamic phase number auto-adjustment 0.5% voltage accuracy for load regulation and line regulation Selectable switching frequencies: 400kHz, 600kHz, 800kHz, and 1MHz Supports multiple protection functions including UVLO/OVP/UVP/OCP/NOCP Core Advantages Excellent current sharing and phase interleaving functionality Fast transient response and simple loop compensation Minimizes the use of standard external components IS6605H, High Power Density, High Frequency, Fully Integrated Synchronous Buck Converter Solution Positioning: Ultra-Compact VDD0V9 Power Supply Unit The IS6605H, housed in a 2mm x 3mm QFN package, provides an area-optimized solution capable of delivering up to 6A output current, maintaining high operating efficiency across the output load current range. Input Voltage: 4V -16V, Output Voltage: 0.6V - 5.5V 1μA Typical Quiescent Current (IQ) Programmable Soft-Start Time Efficiency can exceed 90% across the load range Excellent load and line regulation system with 0.5% voltage accuracy Dual Mode Switching: Skip Mode or CCM Mode Selectable switching frequencies: 600kHz, 1MHz, 1.5MHz, 2MHz Built-in open-drain PGOOD signal to indicate chip operating status Core Advantages High integration, minimized volume Proprietary TCOTTM control mode for fast transient response
2025-03-14
Core Solution Direct | Breaking Through the Power Supply Bottleneck in High-Performance Laptops The [Core Solution Direct] column selects power solutions verified by the market, from classic iterations to breakthrough new products, from high-precision power management ICs to multi-phase parallel optimization, decoding the performance leap of each chip to provide better power supply and protection solutions for your designs. Last time, we released 4 high-integration domestic desktop power solutions (IVS Power Solutions Empower Domestic Desktops). This time, based on market applications, we have carefully selected 4 high-power supply solutions. Don't miss out! As the Xinchuang (Information Technology Application Innovation) industry advances further, domestic high-performance laptops are accelerating the leap from technological followership to leadership in key areas. The continuous pursuit of computing power in mobile computing platforms drives performance growth in heterogeneous systems (CPU+GPU+xPU), leading to an exponential increase in system-level power consumption. Figure: Power Supply Challenges for High-Performance Laptops IS6202A+IS6811A High-Efficiency Power Supply Solution Positioning: AVSBus Dynamic Voltage Regulation Multi-Phase V-CORE Solution The IS6202A is a dual-loop, mixed-signal, multi-digital interface 5-phase controller compatible with PMBus and AVSBus protocols, adaptable to various xPU platform voltage regulation needs. The IS6811A is an integrated smart power stage with built-in power MOSFETs and gate drivers, achieving a continuous output current of 30A within a wide input voltage range of 4.5V to 22V. Typical Features IS6202A Dual outputs, supporting flexible 5+0/4+1 phase configuration Dynamic phase control and intelligent power state switching Fast transient response, ultra-high efficiency IS6811A Withstands currents 4 times higher than the maximum operating current, double that of competitors Optimized switch on-resistance and parasitic inductance Supports precise current sensing, temperature sensing, and fault alarm functions High-efficiency power conversion technology with conversion efficiency up to 94% Core Advantages Multi-phase parallel power supply technology, supporting up to 150A continuous current output Supports dynamic voltage regulation and power management functions Focus on efficiency and compact size for laptop applications IS6630A/C/D, Three-Output Switching Converter Solution Positioning: Ultra-High Power Integrated DDR Power Supply Solution The IS6630A/C/D is a fully integrated synchronous switching converter with two internal LDOs, where the Buck can handle up to 10A full-load current. This chip highly integrates the three power rails required for DDR into a single 3mm 3mm 0.85mm QFN package, providing an integrated DDR power solution while occupying minimal space. Typical Features Input Voltage: 4.5V-22V, Output Voltage: 0.6V-3.3V Efficiency can exceed 92% across the load range 10A continuous output current Internally integrated VTT, VTTREF, and VPP LDOs Optional two switching modes for high efficiency and low power consumption Optional 500kHz, 700kHz switching frequencies Differential output voltage sensing and 0.6V internal feedback reference, with ±1% tolerance across the full temperature range Built-in PGOOD signal to indicate chip operating status Supports protection functions like UVLO/OVP/UVP/OCP/NOCP Core Advantages Simple control loop, fast transient response Slope compensation, supports all-ceramic output capacitors Built-in integrator for high output voltage accuracy IS6630A/C/D Typical Application Circuit Diagram IS6302A, Internally Integrates Two Bucks and a Single Load Switch Solution Positioning: High-Power Solution Designed for LPDDR5/4X As a fully integrated switching converter, the IS6302A integrates a 10A VDD2, a 1A VDDQ, and a 1.8V/1A VDD1 load switch. It can continuously output 10A, with a peak current of up to 14A. The VDD1 load switch can provide 1A continuous current with only 2x22uF MLCCs. Typical Features Input Voltage: 3.15V-22V, Output Voltage: 0.9V-1.1V VDDQ output current is 1A, peak current is 3A 1.8V VDD1 peak current is 2.2A VDD2 output current is 10A, peak current is 14A Fast transient response, stable operation using POSCAP/MLCC Fixed 700kHz switching frequency Built-in soft start (SS) and output discharge Supports protection functions like UVLO/OVP/UVP/OCP/NOCP Core Advantages Supports three outputs, internally integrates two Bucks and a single load switch Internally optimized power MOSFETs designed for high efficiency and performance High efficiency, high performance, and a smaller application footprint IS6631A, High Power Density Constant 10A Load Fully Integrated Switching Converter Solution Positioning: POL (Point-of-Load) Solution with 0.6V-12V Output The IS6631A can provide up to 10A of continuous current over a wide input voltage range, with a maximum output voltage of 12V, supporting current limiting in different application modes. Typical Features Input Voltage: 4.5V-22V, Output Voltage adjustable from 0.6V-5.5V and 5.5V-12V Programmable current limit Fixed 700kHz switching frequency Excellent load and line regulation performance, voltage accuracy reaches 1% Output voltage tracking and discharge functions Pre-bias startup, programmable soft-start time Core Advantages Uses TCOT control architecture for fast transient response Integrated slope compensation, output supports all-ceramic capacitor applications Slow integrator to improve output voltage accuracy
2025-07-17
High-Efficiency Overcurrent Protection and Monitoring for Data Centers: Highly Integrated 50A E-Fuse The increasing demands of compute-intensive applications and large-scale data processing require servers and other network equipment to have a stable high-current supply to support high-performance computing. With the significant rise in power requirements, power systems must possess efficient overcurrent protection and monitoring capabilities. Traditional high-current power protection solutions often rely on multiple discrete components. However, in high-power application scenarios, these solutions face challenges such as increased design complexity, excessive space occupation, and maintenance difficulties. To meet the demand for a smaller footprint, the number of components used is continuously decreasing. With product time-to-market shrinking, engineers need ways to simplify designs. IVS provides an innovative solution to address these design challenges. IVS introduces the 50A highly integrated E-Fuse, IS6105A, a chip specifically designed for hot swap protection. It can effectively protect the input from output short circuits and transients. During startup, the output voltage slew rate can be set to limit inrush current. The IS6105A integrates a MOSFET and sense resistor internally and is equipped with a PMBus digital communication interface. It highly integrates power protection, monitoring, and control functions into a single silicon chip. While effectively handling high current loads, it minimizes the number of external components required, simplifying system design. The IS6105A supports a wide input voltage range of 4V to 16V, features current monitoring (IMON), and incorporates a power MOSFET with an RDS_ON of 1.2mΩ. Its advanced on-chip current sensing technology enables fast and accurate current detection. The chip features an internal auxiliary function to discharge external output capacitor energy. When protection is triggered or the enable is turned off, it can reduce the output voltage faster, shut down the downstream circuit, achieve rapid power-down of the load circuit under abnormal conditions, and fulfill the circuit protection function. High Level of Integration The IS6105A integrates the functionalities of many discrete components into a compact 4mm x 5mm package. The chip integrates a comprehensive control function module, a high-precision detection module, and a low-on-resistance, high-speed switching MOSFET. Compared to discrete combinations, this chip can reduce the number of peripheral components, saving design space and cost. Figure: IS6105A vs. Discrete Hot Swap Solution PMBus Protocol Communication Compatibility The IS6105A is compatible with the PMBus 1.3 standard, providing a simple and flexible configuration method, precise system control for circuit boards, and specific monitoring and telemetry technology. The PMBus interface allows programming various parameters such as voltage, current, temperature, and fault parameters, and reading/reporting real-time information. Users can dynamically adjust these parameters to quickly and conveniently integrate power supply information for more efficient power management. This meets the multiple needs of data centers for high current, high-efficiency protection, and system simplification. As shown below, an example of modifying the OVP protection mode via PMBus for the IS6105A: Figure: Setting OVP to LATCH Mode via PMBus Figure: Setting OVP to RETRY Mode via PMBus Comprehensive, High-Precision Current and Voltage Signal Acquisition While supporting reading real-time voltage and current values via the PMBus protocol, the IS6105A utilizes internal high-precision voltage and current acquisition modules to quickly obtain and respond to data such as instantaneous voltage (VIN/VOUT), current (IOUT), temperature (Temperature), and power (PIN). For circuit applications not requiring PMBus communication, the IS6105A can generate a voltage proportional to the device current through an external resistor from the IMON pin to ground, enabling current monitoring and feedback. Figure: VIN Accuracy within ±1% of Full Scale Range Figure: VOUT Accuracy within ±1% of Full Scale Range Figure: Temperature Accuracy within ±3% of Range Figure: PMBus IOUT Accuracy within ±5% of Full Scale Range Figure: Imon Accuracy: ±3% for 10A-50A within Full Scale Range Support for Hot Plug Applications As with many communication infrastructures, high availability and high reliability are key elements in data center system design. Pluggable modules and PCBs (such as servers and storage devices) require protection and control circuits at the power interface, commonly referred to as hot swap control circuits. In hot plug applications, the input can generate extremely high voltages at the moment of insertion, posing a risk of overvoltage breakdown for downstream devices. To prevent instant high voltage from propagating to the E-Fuse's downstream side and damaging components, power-up should be avoided immediately after insertion; it's best to wait for the input voltage to stabilize. The IS6105A allows users to delay chip startup by a preset insertion delay, avoiding the jitter voltage at the insertion moment. From the moment of insertion, a timer starts counting the insertion delay. When the timer finishes counting and power-up conditions are met, VOUT begins a soft start. Introducing an insertion delay via timer counting can effectively prevent the risk of overvoltage breakdown in downstream devices due to unstable voltage at insertion. Figure: IS6105A Hot Swap Startup Schematic Figure: IS6105A Hot Swap Startup Waveform Schematic High-Speed Fault Response To prevent shutdowns caused by load power or device short circuits or overloads, users can set the E-Fuse's maximum current limit via the ISET pin. When a current exceeding the set value is detected, the system will limit the current and start a fault timer. If the current drops to a normal value within the timing period, the chip can promptly exit the OC state and resume operation (OC RECOVER). Conversely, if the current fails to drop below the set value after the timer expires, the chip will disable the current limiting function, pull the fault reporting pin low, and quickly cut off the circuit (OCP). Figure: IS6105A Overcurrent Protection and Overcurrent Recovery Schematic Figure: IS6105A OCP Measured Waveform Schematic For instant high currents with faster rise times and larger values, the IS6105A will immediately trigger SCP protection, responding within 200ns and turning off the FET. After a set time interval, it attempts to self-recover with limited current power-up. If it fails to exit the overcurrent state, the chip will cease power-up attempts and enter latch mode, waiting for the user to manually restart after troubleshooting. Figure: IS6105A Short Circuit Current Schematic Figure: IS6105A SCP Measured Waveform Schematic Ample Safe Operating Area (SOA) As the MOSFET is crucial for E-Fuse operation, its Safe Operating Area (SOA) parameters determine the upper limit of the E-Fuse's electrical performance. A larger SOA means the chip can operate safely and stably over a wider voltage and current range. The figure below shows the SOA of IS6105A. It can be seen that as an E-Fuse supporting a constant 50A load, its limiting current is 110A, providing an extremely ample current margin. Even with momentary high current surges, the IS6105A can still operate normally. To prevent the combined effect of excessive VDS and IDS before MOSFET turn-on from exceeding the SOA, the IS6105A has comprehensive preventive functions. In addition to using soft-start to suppress inrush current, the chip also implements a current limit during soft-start power-up to ensure the MOSFET operates within the SOA. Figure: IS6105A Safe Operating Area (SOA) Chart
2025-12-12