FDMF6705B datasheet(2/21 Pages) ONSEMI

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April 2013

www.fairchildsemi.com

FDMF6705B • Rev. 1.0.3

FDMF6705B - Extra-Small, High-Performance, High-

Frequency DrMOS Module

Benefits

 Ultra-Compact 6x6 mm PQFN, 72% Space-Saving

Compared to Conventional Discrete Solutions

 Fully Optimized System Efficiency

 Clean Switching Waveforms with Minimal Ringing

 High-Current Handling

Features

 Over 93% Peak-Efficiency

 High-Current Handling of 40 A at 12 VIN

 High-Current Handling of 38 A at 19 VIN

 High-Performance PQFN Copper-Clip Package

 3-State 3.3 V PWM Input Driver

 Skip-Mode SMOD# (Low-Side Gate Turn-Off) Input

 Thermal Warning Flag for Over-Temperature

Condition

 Driver Output Disable Function (DISB# Pin)

 Internal Pull-Up and Pull-Down for SMOD# and

DISB# Inputs, Respectively

 Fairchild PowerTrench® Technology MOSFETs for

Clean Voltage Waveforms and Reduced Ringing

 Fairchild SyncFET™ (Integrated Schottky Diode)

Technology in the 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 1 MHz

 Low-Profile SMD Package

 Fairchild Green Packaging and RoHS Compliance

 Based on the Intel® 4.0 DrMOS Standard

Description

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

FDMF6705B integrates a driver IC, two power MOSFETs,

and a bootstrap Schottky diode into a thermally

enhanced, ultra-compact 6x6 mm PQFN package.

With an integrated approach, the complete switching

power stage is optimized with regards 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,

eliminating the need for a snubber circuit in most buck

converter applications.

A new driver IC with reduced dead times and

propagation delays further enhances the performance of

this part. A thermal warning function warns of a potential

over-temperature situation. The FDMF6705B also

incorporates features, such as Skip Mode (SMOD), for

improved light-load efficiency, along with a three-state

3.3 V PWM input for compatibility with a wide range of

PWM controllers.

Applications

 High-Performance Gaming Motherboards

 Notebook Computers, V-Core and Non-V-Core

 Compact Blade Servers, V-Core and Non-V-Core

DC-DC Converters

 Desktop Computers, V-Core and Non-V-Core

DC-DC Converters

 Workstations

 High-Current DC-DC Point-of-Load (POL)

Converters

 Small Form-Factor Voltage Regulator Modules

Ordering Information

Part Number

Current Rating

Package

Top Mark

FDMF6705B

40 A

40-Lead, Clipbond PQFN DrMOS, 6.0x6.0 mm Package

FDMF6705B

FDMF6705B Datasheet(PDF) 2 Page - ON Semiconductor

FDMF6705B Datasheet(HTML) 2 Page - ON Semiconductor

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