August 2009
FDMF6704V - XSTM DrMOS
tm
The Xtra Small, High Performance, High Frequency DrMOS Module with LDO
Benefits
General Description
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Single 12 V power supply operation.
The XSTM 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 FDMF6704V XSTM DrMOS
integrates a driver IC, two power MOSFETs and a bootstrap
Schottky diode along with an integrated 5 V gate drive LDO
regulator 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
Ultra compact size - 6 mm x 6 mm MLP, 44 % space
saving compared to conventional MLP 8 mm x 8 mm
DrMOS packages.
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Ultra compact thermally enhanced 6 mm x 6 mm MLP
package 84 % smaller than conventional discrete solutions.
Fully optimized system efficiency.
Clean voltage waveforms with reduced ringing.
High frequency operation.
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Compatible with a wide variety of PWM controllers in the
market.
R
. This greatly reduces the package parasitics and layout
DS(ON)
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Single input voltage operation.
challenges associated with conventional discrete solutions.
TM
XS
DrMOS
uses
Fairchild's
high
performance
TM
Features
PowerTrench
5 MOSFET technology, which dramatically
reduces ringing in synchronous buck converter applications.
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Internal 12 V to 5 V regulator.
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 SyncFETTM [integrated Schottky diode] technology
in the low side MOSFET.
TM
PowerTrench 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
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compatible with the new Intel
specification.
6 mm x 6 mm DrMOS
Applications
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Integrated bootstrap Schottky diode.
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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.
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.
Gaming Motherboards V-core, non V-core and VTT DC-DC
converters.
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Gaming consoles.
High-current DC-DC Point of Load (POL) converters.
Networking and telecom microprocessor voltage regulators.
Power Train Application Circuit
V
DRV
C
VDRV
V
C
IN
VCIN
C
VIN
VDRV
VCIN
VIN
R
BOOT
DISB#
DISB#
PWM
BOOT
C
BOOT
PWM Input
OFF
L
PHASE
VSWH
OUT
SMOD#
OUTPUT
ON
C
CGND PGND
OUT
Figure 1. Power Train Application Circuit
Ordering Information
Order Number
Marking
Temperature Range
Device Package
Packing Method
Quantity
FDMF6704V
FDMF6704V_1
-55 °C to 150 °C
40 Pin, 3 DAP, MLP 6x6 mm
Tape and Reel
3000
©2008 Fairchild Semiconductor Corporation
FDMF6704V Rev.C
1
www.fairchildsemi.com