September 2008
TM
FDMF6704 - XS DrMOS
tm
The Xtra Small High Performance, High Frequency DrMOS Module
Benefits
General Description
TM
¢
Ultra compact size - 6 mm x 6 mm MLP, 44 % space
The XS
DrMOS family is Fairchild’s next-generation fully-
saving compared to conventional MLP 8 mm x 8 mm
DrMOS packages.
optimized ultra-compact integrated MOSFET plus driver power
stage solution for high current, high frequency synchronous
buck DC-DC applications. The FDMF6704 DrMOS integrates a
driver IC, two power MOSFETs and a bootstrap Schottky diode
into a thermally enhanced 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
¢
¢
¢
¢
Fully optimized system efficiency.
Clean voltage waveforms with reduced ringing.
High frequency operation.
Compatible with a wide variety of PWM controllers in the
market.
dynamic performance, system inductance and R
. This
DS(ON)
greatly reduces the package parasitics and layout challenges
associated with conventional discrete solutions. The driver IC
incorporates advanced features such as SMOD. PWM input is
Tri-State compatible. A 5 V gate drive and an improved PCB
interface [Low Side MOSFET exposed pad] ensure higher
performance. This product is compatible with the new Intel
6 mm x 6 mm DrMOS specification.
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
Applications
¢
¢
¢
¢
Compact blade servers V-core, non V-core and VTT DC-DC
converters.
voltage waveforms and reduced ringing.
¢
¢
¢
Optimized for high switching frequencies of up to 1 MHz.
Skip mode SMOD [low side gate turn off] input.
Desktop computers V-core, non V-core and VTT DC-DC
converters.
TM
Fairchild SyncFET [integrated Schottky diode] technology
Workstations V-core, non V-core and VTT DC-DC
converters.
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).
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.
Fairchild Green Packaging and RoHS
compliant. Low profile SMD package.
Power Train Application Circuit
5 V
C
VCIN
C
12 V
VDRV
C
VIN
VDRV
DISB#
PWM
V
V
IN
CIN
DISB#
BOOT
C
BOOT
PWM Input
OFF
PHASE
VSWH
SMOD#
OUTPUT
ON
C
CGND PGND
OUT
Figure 1. Power Train Application Circuit
Ordering Information
Current Rating @ 350 kHz Input Voltage Typical
Frequency Max
[kHz]
Device
Marking
Part
[A]
[V]
FDMF6704
35
8-14
1000
FDMF6704
©2008 Fairchild Semiconductor Corporation
FDMF6704 Rev.D
1
www.fairchildsemi.com