Fairchild FDMF6704A User Guide

FD F6704A The X tra S all, H igh P erform ance, H igh Frequency D r M odule

August 2009

FDMF6704A - XSTM Dr MOS

The Xtra Small, High Performance, High Frequency Dr MOS Module Benefits General Description Ultra compact size - 6 mm x 6 mm MLP, 44 % space The XSTM Dr MOS family is Fairchild’s next-generation fully- saving compared to conventional MLP 8 mm x 8 mm optimized, ultra-compact, integrated MOSFET plus driver power Dr MOS packages. stage solutions for high current, high frequency synchronous

buck DC-DC applications. The FDMF6704A XSTM Dr MOS

Fully optimized system efficiency.

integrates a driver IC, two power MOSFETs and a bootstrap

Clean voltage waveforms with reduced ringing.

Schottky diode into a thermally enhanced, ultra compact 6 mm x

High frequency operation.

6 mm MLP package. With an integrated approach, the complete switching power stage is optimized with regards to driver and

Features

MOSFET dynamic performance, system inductance and RDS(ON). This greatly reduces the package parasitics and layout

Ultra- compact thermally enhanced 6 mm x 6 mm MLP

challenges associated with conventional discrete solutions.

package 84 % smaller than conventional discrete solutions.

XSTM Dr MOS uses Fairchild's high performance

Synchronous driver plus FET multichip module.

Power Trench TM 5 MOSFET technology, which dramatically

High current handling of 35 A.

reduces ringing in synchronous buck converter applications.

Over 93 % peak efficiency. Power Trench TM 5 can eliminate the need for a snubber circuit in

Logic level PWM input. buck converter applications. The driver IC incorporates advanced features such as SMOD for improved light load

Fairchild's Power Trench® 5 technology MOSFETs for clean

efficiency. A 5 V gate drive and an improved PCB interface

voltage waveforms and reduced ringing.

optimized for a maximum low side FET exposed pad area,

Optimized for high switching frequencies of up to 1 MHz.

ensure higher performance. This product is compatible with

Skip mode SMOD [low side gate turn off] input.

the new Intel 6 mm x 6 mm Dr MOS specification.

Fairchild Sync FETTM [integrated Schottky diode] technology

in the low side MOSFET. Applications

Integrated bootstrap Schottky diode. Compact blade servers V-core, non V-core and VTT DC-DC

converters.

Adaptive gate drive timing for shoot-through protection.

Desktop computers V-core, non V-core and VTT DC-DC

Driver output disable function [DISB# pin].

converters.

Undervoltage lockout (UVLO).

Workstations V-core, non V-core and VTT DC-DC

Fairchild Green Packaging and Ro HS

converters.

compliant. Low profile SMD package.

Gaming Motherboards V-core, non V-core and VTT DC-DC converters. Gaming consoles. High-current DC-DC Point of Load (POL) converters. Networking and telecom microprocessor voltage regulators. Small form factor voltage regulator modules.

Power Train Application Circuit

5 V 12 V CVDRV CVIN

VDRV VCIN VIN RBOOT

DISB# DISB# BOOT

CBOOT

PWM Input

PHASE LOUT

SMOD#ON VSWH OUTPUT

CGND PGND COUT

Figure 1. Power Train Application Circuit

Ordering Information Order Number Marking Temperature Range Device Package Packing Method Quantity FDMF6704A FDMF6704A_1 -55 °C to 150 °C 40 Pin, 3 DAP, MLP 6x6 mm Tape and Reel

©2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FDMF6704A Rev. F