New Industry Products

Smart Power Stage Modules with Integrated Current and Temperature Monitors

November 21, 2018 by Paul Shepard

The FDMF3170 is ON Semiconductor's next-generation Smart Power Stage (SPS) solutions with fully optimized, ultra-compact, integrated MOSFETs with advanced driver IC current and temperature sensors, for high-current, high frequency, and synchronous buck dc-dc converters.

With an integrated approach, the SPS switching power stage is optimized for driver and MOSFET dynamic performance, system parasitic reduction, and power MOSFET RDS(ON).

Applications are expected to include: 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 power systems; and dc-dc power modules.

The integration of power MOSFETs with a driver IC also enables high accuracy module-level current and thermal monitoring. The FDMF3170 provides an output signal (IMON), which reports the real-time module current. The IMON signal can be used to replace inductor DCR current sense or resistor sense methods. There is also very accurate thermal monitoring (TMON) that provides a 0.8V output at 25°C with an 8 mV/°C slope.

FDMF3170

Features

  • Up to 70A Instantaneous Peak Current Handling Capability
  • High-Performance, Universal Footprint, Copper-Clip 5 mm x 6 mm PQFN Package
  • ON Semiconductor's PowerTrench® MOSFETs for Clean Voltage Waveforms and Reduced Ringing
  • 30 V / 25 V Breakdown Voltage MOSFETs for Higher Long Term Reliability
  • Optimized FET Pair for Highest Efficiency at 10% ~ 15 % Duty Cycle
  • Optimized for Switching Frequencies up to 1 MHz
  • Integrated Current Monitoring (IMON)
  • Integrated Temperature Monitor (TMON)
  • Catastrophic Fault Detection Features
  • Thermal Flag (OTP) for Over-Temperature Condition