RSM3514 - Fixed 4:1 ratio IBC with PMBus
Features
Power Conversion Performance
• The RSM3514 supports a 40V to 60V Input Voltage Range
• 10 V o 15V Output Voltage Range
• Up to 1500W Continuous Output Power
• Up to 2500W Transient Output Power
• Up to 98.1% Efficiency
Scalability and System Integration
• Parallel Operation for Multi-kW Arrays
• Fixed 4:1 transformer turns ratio
Digital Control and Telemetry
• Configuration and Monitoring via PMBus
• Non-Volatile Memory (NVM) for custom configuration
• Input Voltage, Output Voltage, Output Current, and
Temperature Monitoring
Protection Features
• Auto-Recovery Mode for UVP, OTP, and OCP
Package and Assembly
• 23mm × 17.4mm × 8mm LGA Package
• Reflow Soldering (MSL 3)
Description
RSM3514 1500W Fixed 4:1 Digital Intermediate Bus Converter for AI Power Delivery
As AI processors, accelerator cards, and high-performance computing platforms continue to increase in power consumption, system designers require power conversion solutions that maximize efficiency while supporting ever-increasing current demands. The RSM3514 is a high-efficiency 1500W non-isolated Intermediate Bus Converter (IBC) that converts a 40V to 60V input into a fixed 4:1 output ratio (10V to 15V), providing an ultra-efficient intermediate power rail for downstream multiphase voltage regulators and point-of-load (POL) converters.
Delivering up to 1500W continuous output power, 2500W transient capability, and up to 98.1% efficiency, the RSM3514 is optimized for AI servers, cloud infrastructure, high-performance computing (HPC), and networking equipment where maximizing power density and minimizing conversion losses are critical. Integrated PMBus® configuration, telemetry, and non-volatile memory (NVM) simplify system integration while providing real-time visibility into converter operation.
Optimized for Modern 48V AI Power Architectures
Today’s AI servers and cloud platforms increasingly distribute power at 48V to reduce distribution losses and improve overall system efficiency. The RSM3514 serves as the first conversion stage, efficiently converting the 48V distribution bus into an intermediate 10V to 15V rail using a fixed 4:1 transformer turns ratio.
Compared with traditional regulated converters, the fixed-ratio architecture minimizes power loss and thermal dissipation, making the RSM3514 an excellent choice for applications where efficiency and power density take priority over output regulation.
Typical applications include:
- Artificial intelligence (AI) servers
- GPU accelerator platforms
- High-performance computing (HPC)
- Cloud data centers
- Networking switches and routers
- FPGA and ASIC platforms
- Distributed power architectures
Maximum Efficiency Through Fixed-Ratio Conversion
The RSM3514 is engineered to deliver outstanding efficiency under demanding workloads.
Key performance highlights include:
- 40V to 60V input voltage range
- Fixed 4:1 conversion ratio
- 10V to 15V output voltage
- 1500W continuous output power
- 2500W transient capability
- Up to 98.1% peak efficiency
This combination of high efficiency and high power density helps reduce cooling requirements, improve overall system efficiency, and simplify thermal management in AI and cloud infrastructure.
Intelligent Digital Power Management
The RSM3514 integrates a digital controller with PMBus®, providing complete visibility into converter performance while enabling flexible configuration and diagnostics.
Using PMBus, designers can:
- Configure operating parameters
- Store custom settings in non-volatile memory (NVM)
- Monitor input voltage
- Monitor output voltage
- Monitor output current
- Monitor temperature
- Read fault and status information
These digital management capabilities simplify production testing, accelerate system validation, improve field diagnostics, and enable predictive maintenance in large-scale computing environments.
Scalable for Multi-kilowatt Power Systems
Modern AI platforms often require significantly more than a single kilowatt of power. The RSM3514 supports parallel operation, allowing multiple modules to operate together in multi-kilowatt power architectures while maintaining excellent load sharing and system performance.
This scalable approach enables designers to develop common power platforms that can easily grow with future processor generations without redesigning the overall power architecture.
Comprehensive Protection for Reliable Operation
To maximize system reliability, the RSM3514 integrates multiple protection features that help safeguard both the converter and downstream electronics.
Integrated protection includes:
- Overcurrent protection (OCP)
- Overtemperature protection (OTP)
- Undervoltage protection (UVP)
- Automatic fault recovery
- PMBus fault reporting
These features reduce the need for additional supervisory circuitry while improving long-term system reliability.
Part of Reed’s Complete AI Power Portfolio
The RSM3514 complements Reed Semiconductor’s complete family of AI power solutions.
A typical AI power architecture may include:
- RS31512 PMBus stackable eFuse for protecting the 48V distribution rail.
- RSM3514 fixed-ratio Intermediate Bus Converter for ultra-efficient 48V-to-12V-class conversion.
- Reed multiphase PWM controllers for generating processor core voltages.
- Reed Smart Power Blocks and Smart Power Stages for high-current point-of-load regulation.
Together, these products provide a complete, scalable power delivery solution from the rack-level 48V bus to the processor core.
Choose the Right Digital Intermediate Bus Converter
Reed Semiconductor offers a family of digital IBCs optimized for different system requirements.
| Device | Output | Best For |
|---|---|---|
| RSM3502 | Fixed 4:1 ratio, 1000W | Compact systems prioritizing efficiency |
| RSM3514 | Fixed 4:1 ratio, 1500W | High-power AI and cloud infrastructure |
| RSM3505 | Regulated 12V, 1300W | Applications requiring regulated output |
| RSM3503 | Regulated 12V, 1600W | Higher-power regulated 12V systems |
| RSM3512 | Regulated 12V, 2000W | Maximum-power AI and HPC platforms |
Whether your priority is maximum efficiency through fixed-ratio conversion or precisely regulated output, Reed Semiconductor provides an Intermediate Bus Converter optimized for your application.
Why Choose the RSM3514?
The RSM3514 combines high-efficiency fixed-ratio power conversion, digital PMBus management, and multi-kilowatt scalability into a compact, high-density module designed for next-generation AI infrastructure. With industry-leading efficiency, integrated telemetry, configurable operation, and parallel capability, it enables designers to build efficient, scalable power architectures capable of meeting the rapidly growing demands of AI, cloud, and high-performance computing platforms.
Applications
• Artificial Intelligence Systems
• Data Center
• Networking Systems
