FDMF6704 Datasheet, PDF (1/13 Pages) Fairchild Semiconductor – The Xtra Small High Performance, High Frequency DrMOS Module

September 2008
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
General Description
The XS^TM DrMOS family is Fairchild’s next-generation fully-
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
dynamic performance, system inductance and R_DS(ON). This
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.
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.
5V
C_VDRV
C_VCIN
DISB#
PWM Input
OFF
ON
VDRV V_CIN
DISB#
V_IN
BOOT
PWM
SMOD#
PHASE
VSWH
CGND PGND
12 V
C_VIN
C_BOOT
OUTPUT
C_OUT
Ordering Information
Figure 1. Power Train Application Circuit
Part
FDMF6704
Current Rating @ 350 kHz
[A]
35
Input Voltage Typical
[V]
8-14
Frequency Max
[kHz]
1000
©2008 Fairchild Semiconductor Corporation
1
FDMF6704 Rev.D
Device
Marking
FDMF6704
www.fairchildsemi.com