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FDMF6704A ,XS?DrMOSfeatures such as SMOD for improved light load® Fairchild's PowerTrench 5 technology MOSFETs for cl ..
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FDMF6704A
XS?DrMOS
August 2009
FDMF6704A - XSTM DrMOS
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.
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. Logic level 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. 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.
General DescriptionThe 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 FDMF6704A XSTM 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
RDS(ON). This greatly reduces the package parasitics and layout
challenges associated with conventional discrete solutions.TM DrMOS uses Fairchild's high performance
PowerTrenchTM 5 MOSFET technology, which dramatically
reduces ringing in synchronous buck converter applications.
PowerTrenchTM 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. 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. Small form factor voltage regulator modules.
Power Train Application CircuitFigure 1. Power Train Application Circuit
Ordering InformationDISB#
PWM
CGND PGND
VCIN VIN
BOOT
VSWH
DISB#
PWM Input
CVIN
12 V
CBOOT
COUT
OUTPUT
5 V
CVDRV
VDRV
SMOD#ON
OFF PHASE LOUT
RBOOT
