RSM5G05 - High Frequency Low-Profile Smart Power Block
Features
Performance
• The RSM5G05 supports a wide 2.5 V to 7.5 V input voltage range
• Up to 140 A continuous output current (70 A per phase)
• Up to 3 MHz switching frequency
• Peak efficiency up to 92.5% (6.75VIN to 0.8VOUT)
High Integration
• Dual independent outputs configurable for dual-rail operation or paralleled for up to 140 A output current
• Integrated smart drivers, MOSFETs, and inductors
• Accurate current and junction temperature sensing
• Integrated power stage reduces PCB area and routing losses
Robust Protection
• VIN and VDRV UVLO
• High-side overcurrent protection
• Cycle-by-cycle current limiting
• Overtemperature protection (OTP)
Package
• Compact 10 mm × 9 mm × 5 mm, 72-pin LGA package
• Operating junction temperature: −40°C to +125°C
• Low-profile package maximizes power density
• RoHS compliant
Description
RSM5G05 140A Low-Profile Smart Power Block for High-Density Power Delivery
The RSM5G05 is a highly integrated 140A Smart Power Block that combines smart gate drivers, high-performance MOSFETs, integrated inductors, current sensing, and temperature monitoring into a compact 10mm × 9mm × 5mm, 72-pin LGA package. Designed for high-current DC-DC power conversion, the RSM5G05 enables designers to build compact, high-efficiency power supplies while reducing PCB complexity and overall system height.
Supporting an input voltage range of 2.5V to 7.5V, the RSM5G05 is optimized for low-voltage distributed power architectures commonly found in AI accelerators, enterprise servers, networking equipment, FPGA platforms, and advanced ASIC applications. Its highly integrated design reduces component count, shortens high-current switching paths, minimizes parasitic inductance, and improves thermal performance compared to conventional discrete power stage implementations.
Featuring two independent 70A power stages that can operate independently or in parallel to provide 140A continuous output current, the RSM5G05 offers the flexibility required for modern multiphase voltage regulator modules (VRMs) while delivering peak efficiencies of up to 92.5%.
Optimized for Reed Semiconductor Multiphase PWM Controllers
The RSM5G05 is designed to operate seamlessly with Reed Semiconductor’s digital and analog multiphase PWM controllers, providing a complete power management solution for high-current processor power rails. Combining Reed Smart Power Blocks with Reed PWM controllers simplifies system development while maximizing efficiency, improving transient response, and enabling accurate current balancing across multiple phases.
Recommended companion controllers include:
- RS19G20 – Digital 20-phase PWM controller with PMBus support
- RS19C20 – High-performance digital controller for AI and server processors
- RS19820 – Advanced digital VR controller with telemetry capabilities
- RS18G30 – Digital multiphase PWM controller with PMBus communication
- RS17G22 – High-density multiphase controller for enterprise and networking applications
- RS18C22 – Analog multiphase PWM controller
- RS16K20 – Cost-optimized controller for industrial, storage, and embedded systems
Together, Reed Semiconductor’s Smart Power Blocks and PWM controllers provide scalable power architectures that support applications ranging from compact point-of-load (POL) converters to high-current processor power supplies for CPUs, GPUs, AI accelerators, FPGAs, and custom ASICs.
High Efficiency in a Low-Profile Package
The RSM5G05 delivers the performance advantages of an integrated Smart Power Block in a compact 5mm low-profile package, making it an excellent choice for systems where both board space and component height are limited. By integrating smart gate drivers, high-performance MOSFETs, and inductors into a single package, the RSM5G05 significantly reduces the number of external components required while simplifying PCB layout and improving manufacturability.
Operating at switching frequencies up to 3MHz, the RSM5G05 supports the use of smaller external capacitors and optimized passive components, helping designers achieve higher overall power density. The integrated magnetic structure minimizes switching loop inductance, reducing electrical losses and improving efficiency while supporting excellent thermal performance under high-current operation.
This combination of integration, efficiency, and compact packaging enables engineers to develop smaller, lighter, and more reliable power solutions for next-generation computing platforms.
Integrated Monitoring and Comprehensive Protection
The RSM5G05 incorporates integrated current sensing and junction temperature monitoring to improve system diagnostics and simplify power supply management. Accurate current measurement supports effective phase balancing across multiphase converters, while integrated temperature sensing enables intelligent thermal management and enhanced long-term reliability.
To help protect both the Smart Power Block and the load, the RSM5G05 includes comprehensive protection features such as:
- VIN undervoltage lockout (UVLO)
- VDRV undervoltage lockout (UVLO)
- High-side overcurrent protection
- Cycle-by-cycle current limiting
- Overtemperature protection (OTP)
These integrated protection functions improve overall system robustness while reducing the need for additional external protection circuitry.
Ideal for AI, Server, and FPGA Power Applications
The RSM5G05 is optimized for applications requiring compact implementation, exceptional efficiency, and high-current capability.
Typical applications include:
- AI accelerator cards
- Server voltage regulator modules (VRMs)
- GPU core power supplies
- FPGA and ASIC core power rails
- Enterprise storage systems
- Networking switches and routers
- Cloud computing infrastructure
- High-current point-of-load (POL) converters
- High-density power modules
- Advanced embedded computing systems
Its combination of 2.5V to 7.5V input operation, 140A current capability, and low-profile packaging makes it an ideal solution for space-constrained processor power architectures.
Accelerate Development with an Integrated Power Solution
The RSM5G05 combines high-performance MOSFETs, smart gate drivers, integrated inductors, current sensing, temperature monitoring, and comprehensive protection into a single compact Smart Power Block. Compared to discrete implementations, this highly integrated architecture reduces PCB area, lowers component count, shortens layout time, and improves overall electrical and thermal performance.
When paired with Reed Semiconductor’s family of multiphase PWM controllers, the RSM5G05 becomes part of a complete power delivery platform supporting AI servers, enterprise networking equipment, cloud infrastructure, FPGA designs, and advanced embedded computing. Together, Reed’s Smart Power Blocks and PWM controllers enable engineers to build smaller, more efficient, and more reliable power systems while accelerating product development and reducing overall design complexity.
