Smart Power Stage (SPS) Module with Integrated Temperature Monitor

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Overview

The SPS family is Fairchild’s next-generation, fully optimized, ultra-compact, integrated MOSFET plus driver power stage solution for high-current, high-frequency, synchronous buck, DC-DC applications. The FDMF5826DC integrates a driver IC with a bootstrap Schottky diode, two power MOSFETs, and a thermal monitor into a thermally enhanced, ultra-compact, 5 mm x 5 mm package.
With an integrated approach, the SPS switching power stage is optimized for driver and MOSFET dynamic performance, minimized system inductance, and power MOSFET RDS(ON). The SPS family uses Fairchild's high-performance PowerTrench® MOSFET technology, which reduces switch ringing, eliminating the need for a snubber circuit in most buck converter applications.
A driver IC with reduced dead times and propagation delays further enhances the performance. A thermal monitor function warns of a potential over-temperature situation. The FDMF5826DC incorporates an Auto-DCM Mode (ZCD#) for improved light-load efficiency. The FDMF5826DC also provides a 3-state 5 V PWM input for compatibility with a wide range of PWM controllers.

  • Ultra-Compact 5 mm x 5 mm PQFN Copper-Clip Package with Flip Chip Low-Side MOSFET and Dual Cool™ Architecture
  • High Current Handling: 60 A
  • 3-State 5 V PWM Input Gate Driver
  • Dynamic Resistance Mode for Low-Side Drive (LDRV) Slows Low-Side MOSFET during Negative Inductor Current Switching
  • Auto DCM (Low-Side Gate Turn Off) Using ZCD# Input
  • Thermal Monitor for Module Temperature Reporting
  • HS-Short Detect Fault# / Shutdown
  • Dual Mode Enable / Fault# Pin
  • Internal Pull-Up and Pull-Down for ZCD# and
  • EN Inputs, respectively
  • Fairchild PowerTrench® MOSFETs for Clean Voltage Waveforms and Reduced Ringing
  • Fairchild SyncFET™ Technology (Integrated Schottky Diode) in Low-Side MOSFET
  • Integrated Bootstrap Schottky Diode
  • Optimized / Extremely Short Dead-Times
  • Optimized for Switching Frequencies up to 1.5 MHz
  • Under-Voltage Lockout (UVLO) on VCC
  • Low Shutdown Current: < 2 mA
  • PWM Minimum Controllable On-Time: 30 ns
  • Operating Ambient Temperature Range: -40°C to +125°
  • Optimized FET Pair for Highest Efficiency: 10 ~ 15% Duty Cycle
  • Fairchild Green Packaging and RoHS Compliance

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