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Fairchild Semiconductor Electronic Components Datasheet

FDMF6705B Datasheet

High-Frequency DrMOS

No Preview Available !

March 2012
FDMF6705B - Extra-Small, High-Performance, High-
Frequency DrMOS Module
Benefits
Ultra-Compact 6x6mm PQFN, 72% Space-Saving
Compared to Conventional Discrete Solutions
Fully Optimized System Efficiency
Clean Switching Waveforms with Minimal Ringing
High-Current Handling
Features
Over 93% Peak-Efficiency
High-Current Handling of 40A at 12VIN
High-Current Handling of 38A at 19VIN
High-Performance PQFN Copper-Clip Package
3-State 3.3V PWM Input Driver
Skip-Mode SMOD# (Low-Side Gate Turn-Off) Input
Thermal Warning Flag for Over-Temperature
Condition
Driver Output Disable Function (DISB# Pin)
Internal Pull-Up and Pull-Down for SMOD# and
DISB# Inputs, Respectively
Fairchild PowerTrench® Technology MOSFETs for
Clean Voltage Waveforms and Reduced Ringing
Fairchild SyncFET™ (Integrated Schottky Diode)
Technology in the Low-Side MOSFET
Integrated Bootstrap Schottky Diode
Adaptive Gate Drive Timing for Shoot-Through
Protection
Under-Voltage Lockout (UVLO)
Optimized for Switching Frequencies up to 1MHz
Low-Profile SMD Package
Fairchild Green Packaging and RoHS Compliance
Based on the Intel® 4.0 DrMOS Standard
Description
The XS™ 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
FDMF6705B integrates a driver IC, two power MOSFETs,
and a bootstrap Schottky diode into a thermally
enhanced, ultra-compact 6x6mm PQFN package.
With an integrated approach, the complete switching
power stage is optimized with regards to driver and
MOSFET dynamic performance, system inductance,
and power MOSFET RDS(ON). XS™ DrMOS uses
Fairchild's high-performance PowerTrench® MOSFET
technology, which dramatically reduces switch ringing,
eliminating the need for a snubber circuit in most buck
converter applications.
A new driver IC with reduced dead times and
propagation delays further enhances the performance of
this part. A thermal warning function warns of a potential
over-temperature situation. The FDMF6705B also
incorporates features, such as Skip Mode (SMOD), for
improved light-load efficiency, along with a three-state
3.3V PWM input for compatibility with a wide range of
PWM controllers.
Applications
High-Performance Gaming Motherboards
Notebook Computers, V-Core and Non-V-Core
Compact Blade Servers, V-Core and Non-V-Core
DC-DC Converters
Desktop Computers, V-Core and Non-V-Core
DC-DC Converters
Workstations
High-Current DC-DC Point-of-Load (POL)
Converters
Small Form-Factor Voltage Regulator Modules
Ordering Information
Part Number Current Rating
Package
FDMF6705B
40A 40-Lead, Clipbond PQFN DrMOS, 6.0x6.0mm Package
Top Mark
FDMF6705B
© 2011 Fairchild Semiconductor Corporation
FDMF6705B • Rev. 1.0.2
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/


Fairchild Semiconductor Electronic Components Datasheet

FDMF6705B Datasheet

High-Frequency DrMOS

No Preview Available !

Typical Application Circuit
V5V
CVDRV
CVIN
VIN
3V ~ 24V
DISB#
PWM Input
OFF
ON
Open-Drain
Output
DISB#
VDRV
VCIN
VIN
BOOT
RBOOT
PWM
SMOD#
FDMF6705B
PHASE
VSWH
THWN#
CGND
PGND
CBOOT
LOUT
COUT
VOUT
Figure 1. Typical Application Circuit
DrMOS Block Diagram
VCIN
UVLO
VDRV
DISB#
10µA
VCIN
PWM
RUP_PWM
RDN_PWM
Input
3-State
Logic
THWN#
Temp.
Sense
GH
Logic
VCIN
GL
Logic
10µA
DBoot
Level Shift
Dead Time
Control
BOOT
VIN
Q1
HS Power
MOSFET
GH
30kΩ
PHASE
VDRV
VSWH
GL
30kΩ
Q2
LS Power
MOSFET
CGND
SMOD#
Figure 2. DrMOS Block Diagram
PGND
© 2011 Fairchild Semiconductor Corporation
FDMF6705B • Rev. 1.0.2
2
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/


Part Number FDMF6705B
Description High-Frequency DrMOS
Maker Fairchild Semiconductor
PDF Download

FDMF6705B Datasheet PDF






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