FDMF6704_09 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – The Xtra Small, High Performance, High Frequency DrMOS Module

August 2009
FDMF6704 - XSTM DrMOS
tm
The Xtra Small, High Performance, High Frequency DrMOS Module
Benefits
Ultra compact size - 6 mm x 6 mm MLP, 44 % space
saving compared to conventional MLP 8 mm x 8 mm
DrMOS packages.
Fully optimized system efficiency.
Clean voltage waveforms with reduced ringing.
High frequency operation.
Compatible with a wide variety of PWM controllers in the
market.
Features
Ultra- compact thermally enhanced 6 mm x 6 mm MLP
package 84 % smaller than conventional discrete solutions.
Synchronous driver plus FET multichip module.
High current handling of 35 A.
Over 93 % peak efficiency.
Tri-State PWM input.
Fairchild's PowerTrench^® 5 technology MOSFETs for clean
voltage waveforms and reduced ringing.
Optimized for high switching frequencies of up to 1 MHz.
Skip mode SMOD [low side gate turn off] input.
Fairchild SyncFET^TM [integrated Schottky diode] technology
in the low side MOSFET.
Integrated bootstrap Schottky diode.
Adaptive gate drive timing for shoot-through protection.
Driver output disable function [DISB# pin].
Undervoltage lockout (UVLO).
Fairchild Green Packaging and RoHS
compliant. Low profile SMD package.
Power Train Application Circuit
5V
C_VDRV
DISB#
PWM Input
OFF
ON
VDRV VCIN VIN
DISB#
BOOT
PWM
SMOD#
PHASE
VSWH
CGND PGND
General Description
The XS^TM DrMOS family is Fairchild’s next-generation fully-
optimized, ultra-compact, integrated MOSFET plus driver power
stage solutions for high current, high frequency synchronous
buck DC-DC applications. The FDMF6704 XS^TM DrMOS
integrates a driver IC, two power MOSFETs and a bootstrap
Schottky diode into a thermally enhanced, ultra compact 6 mm x
6 mm MLP package. With an integrated approach, the complete
switching power stage is optimized with regards to driver and
MOSFET dynamic performance, system inductance and
R_DS(ON). This greatly reduces the package parasitics and layout
challenges associated with conventional discrete solutions.
XS^TM DrMOS uses Fairchild's high performance
PowerTrench^TM 5 MOSFET technology, which dramatically
reduces ringing in synchronous buck converter applications.
PowerTrench^TM 5 can eliminate the need for a snubber circuit in
buck converter applications. The driver IC incorporates
advanced features such as SMOD for improved light load
efficiency and a Tri-State PWM input for compatibility with a
wide range of PWM controllers. A 5 V gate drive and an
improved PCB interface optimized for a maximum low side FET
exposed pad area, ensure higher performance. This product is
compatible with the new Intel 6 mm x 6 mm DrMOS
specification.
Applications
Compact blade servers V-core, non V-core and VTT DC-DC
converters.
Desktop computers V-core, non V-core and VTT DC-DC
converters.
Workstations V-core, non V-core and VTT DC-DC
converters.
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.
12 V
C_VIN
R_BOOT
C_BOOT
L_OUT
OUTPUT
C_OUT
Ordering Information
Order Number
FDMF6704
Marking
FDMF6704_1
Figure 1. Power Train Application Circuit
Temperature Range
Device Package
-55 °C to 150 °C 40 Pin, 3 DAP, MLP 6x6 mm
Packing Method
Tape and Reel
Quantity
3000
©2008 Fairchild Semiconductor Corporation
1
FDMF6704 Rev. G
www.fairchildsemi.com