Extra-Small, High-Performance, High-Frequency DrMOS Module

The XS™ DrMOS 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 FDMF6708 integrates a driver IC, two power MOSFETs, and a bootstrap Schottky diode into a thermally enhanced, ultra-compact 6x6mm package.

With an integrated approach, the complete switching power stage is optimized with regard to driver and MOSFET dynamic performance, system inductance, and power MOSFET RDS(ON). XS™ DrMOS uses Fairchild's high-performance PowerTrench® MOSFET technology, which dramatically reduces switch ringing, elimination the need for snubber circuit in most buck converter applications.

A driver IC with reduced dead times and propagation delays further enhances the performance. A thermal warning function warns of a potential over-temperature situation. The FDMF6708N also incorporates a Zero-Cross Detect (ZCD_EN#) for improved light-load efficiency. The FDMF6708N also provide a 3-state 5V PWM input for compatibility with a wide range of PWM controllers.


  • Over 93% Peak-Efficiency
  • High-Current Handling: 45A
  • High-Performance PQFN Copper-Clip Package
  • 3-State 5V PWM Input Driver
  • Automatic Diode Emulation (Skip Mode) enabled through ZCD_EN# Input
  • Thermal Warning Flag for Over-Temperature Condition
  • Driver Output Disable Function (DISB# Pin)
  • Internal Pull-Up and Pull-Down for ZCD_EN# and DISB# Inputs, Respectively
  • Fairchild PowerTrench® Technology MOSFETs for Clean Voltage Waveforms and Reduced Ringing
  • Fairchild SyncFET™ (Integrated Schottky Diode) Technology in Low-Side MOSFET
  • Integrated Bootstrap Schottky Diode
  • Adaptive Gate Drive Timing for Shoot-Through Protection
  • Under-Voltage Lockout (UVLO)
  • Optimized for Switching Frequencies up to 1MHz
  • Low-Profile SMD Package
  • Fairchild Green Packaging and RoHS Compliance
  • Based on the Intel® 4.0 DrMOS Standard
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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
FDMF6708N Full Production
Green as of Oct 2011
 China RoHS

PQFN 6x6 40L (Power 66)  -  Details
1.1 x 6 x 6mm,  TAPE REEL

PDF PQFN 6x6 40L (Power 66)  Drawing
Last Update: Jan 2015 PDF PQFN8L Drmos_ZM01, Packing Drawing
Last Update: May 2013 PDF PQFN Tape and Reel Packing Drawing
Last Update: Mar 2017
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&3 (3-Digit Date Code)

Line 2FDMF

Line 36708N

ESD (CDM) 2500V

ESD (HBM) 2000V

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260

PDF China RoHS

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