Overview
The FDMF3172, produced by Fairchild Semiconductor (now part of ON Semiconductor), is a Smart Power Stage (SPS) module designed for high-current, high-frequency synchronous buck DC-DC converters. Although this device is not recommended for new designs and users are advised to consider the pin-to-pin replacement FDMF5062, it remains a significant component in existing systems. The module integrates advanced driver ICs with current and temperature sensors, optimizing driver and MOSFET dynamic performance and reducing system parasitics and power MOSFET RDS(ON).
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 39-PowerVFQFN |
| Instantaneous Peak Current Handling | Up to 55 A |
| DC Breakdown Voltage MOSFETs | 30 V / 25 V |
| Switching Frequencies | Up to 1 MHz |
| Operating Temperature Range | -40°C to 125°C |
| VCC and PVCC Voltage Levels | 3.3V, 5V |
| Compliance | Pb-Free, Halogen Free/BFR Free, and RoHS Compliant |
Key Features
- High-performance, universal footprint in a 5 mm x 6 mm PQFN package
- ON Semiconductor's PowerTrench® MOSFETs for clean voltage waveforms and reduced ringing
- Optimized FET pair for highest efficiency at 10% ~ 15% duty cycle
- Integrated current monitoring (IMON) and temperature monitor (TMON)
- Catastrophic fault detection features including over-current protection (OCP), high-side short detect, and under-voltage lockout (UVLO) on VCC and PVCC
- Thermal flag (OTP) for over-temperature condition
- Green packaging compliant with environmental standards
Applications
- CPU and Memory Voltage Regulators compliant with Intel's VR13 Purley Systems
- High-Current Multiphase Voltage Regulators
- Graphics Processing Unit (GPU) Cards
- Server, Storage, and Telecom systems
Q & A
- What is the FDMF3172?
The FDMF3172 is a Smart Power Stage (SPS) module with integrated MOSFETs and driver ICs, designed for high-current, high-frequency synchronous buck DC-DC converters.
- Why is the FDMF3172 not recommended for new designs?
The FDMF3172 is not recommended for new designs; instead, users are advised to use the pin-to-pin replacement FDMF5062.
- What is the maximum instantaneous peak current handling capability of the FDMF3172?
The FDMF3172 can handle up to 55 A of instantaneous peak current.
- What are the key features of the FDMF3172's package?
The FDMF3172 comes in a high-performance, universal footprint 5 mm x 6 mm PQFN package.
- Does the FDMF3172 have integrated current and temperature monitoring?
Yes, the FDMF3172 includes integrated current monitoring (IMON) and temperature monitoring (TMON).
- What are some of the fault detection features of the FDMF3172?
The FDMF3172 includes over-current protection (OCP), high-side short detect, under-voltage lockout (UVLO), and a thermal flag (OTP) for over-temperature conditions.
- Is the FDMF3172 compliant with environmental standards?
Yes, the FDMF3172 is Pb-Free, Halogen Free/BFR Free, and RoHS Compliant.
- What are some typical applications of the FDMF3172?
The FDMF3172 is used in CPU and memory voltage regulators, high-current multiphase voltage regulators, GPU cards, and server, storage, and telecom systems.
- What is the operating temperature range of the FDMF3172?
The operating temperature range of the FDMF3172 is -40°C to 125°C.
- Can the FDMF3172 be used in high-frequency applications?
Yes, the FDMF3172 is optimized for switching frequencies up to 1 MHz.
