RS95F36

150A Top-Side Cooled Smart Power Stage

The RS95F36T is a 150A Smart Power Stage designed for high-current, high-density multiphase power conversion in AI accelerators, GPUs, CPUs, ASICs, servers, and other high-performance computing systems. Integrating high-side and low-side power MOSFETs, optimized gate drivers, current sensing, and temperature sensing, the RS95F36T combines the critical power-stage functions required for efficient, compact processor power delivery.

With a 3.5V to 8V input range, up to 150A maximum output current, and 80A TDC capability, the RS95F36T is optimized for the rapidly increasing current requirements of advanced processors. The device supports switching frequencies up to 3MHz with a 5V input, giving designers additional flexibility to balance efficiency, transient performance, and solution size.

A compact 6mm × 6mm TLGA package with top-side cooling provides a direct thermal path from the power stage to the system cooling solution, helping overcome one of the key limitations of increasingly dense multiphase voltage regulators.

Direct Thermal Path for High-Density Power

As processor current increases, removing heat through the PCB alone can become a significant constraint on power density. The RS95F36T’s top-side cooled construction provides a direct thermal interface above the power stage, allowing heat to be transferred to an appropriate system-level cooling solution.

This additional thermal path can help designers manage higher current density while reducing dependence on PCB-based heat spreading. The result is greater flexibility when designing compact voltage regulators around high-power processors where both board area and thermal headroom are limited.

Integrated 150A Smart Power Stage

The RS95F36T integrates the high-side and low-side MOSFETs and their associated gate drivers into a single power-stage solution. This integration reduces critical switching-loop parasitics while simplifying the implementation of high-current multiphase converters.

With 150A maximum current and 80A TDC capability, each power stage can support substantial phase current, enabling scalable architectures for increasingly demanding processor rails.

High-Frequency Operation for Optimized Power Density

Supporting switching frequencies from 100kHz to 3MHz with a 5V input, the RS95F36T gives power designers flexibility to optimize the tradeoffs between efficiency, transient response, magnetic component size, and overall power density.

Compatibility with 3.3V tri-state PWM controllers also makes the device well suited to advanced multiphase architectures used for high-performance processor power.

Integrated Monitoring and Protection

Beyond high-current power conversion, the RS95F36T integrates sensing and protection functions that support reliable operation in demanding computing environments.

Current and Temperature Sensing

Integrated current and temperature sensing provide real-time information about power-stage operating conditions. These signals can be used by the multiphase control system to support monitoring, telemetry, phase management, and system-level power optimization.

Comprehensive Power-Stage Protection

Integrated protection includes VIN undervoltage lockout, VDD/VDRV undervoltage lockout, high-side overcurrent protection, cycle-by-cycle overcurrent limiting, and overtemperature protection, helping protect the power stage during abnormal operating conditions.

Scalable Multiphase Power for AI and High-Performance Computing

The RS95F36T is designed to pair with Reed Semiconductor digital multiphase controllers to create scalable high-current power architectures. Designers can increase phase count as processor current requirements grow while maintaining coordinated control, monitoring, protection, and transient performance across the power system.

This controller-plus-power-stage approach is particularly well suited to applications where designers require the flexibility of a discrete Smart Power Stage architecture, including implementations using TLVR magnetics. For applications where maximum integration is preferred, Reed also offers Smart Power Blocks that combine the power stage and inductor into a compact module.

Together, Reed multiphase controllers, Smart Power Stages, and Smart Power Blocks provide a scalable power platform for current and future generations of high-performance processors.