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Fairchild Semiconductor Electronic Components Datasheet

FDMF6705V Datasheet

High-Frequency DrMOS

No Preview Available !

March 2011
FDMF6705V – XS™ DrMOS – Extra-Small, High-
Performance, High-Frequency DrMOS Module
Benefits
Single 12V Input Power Supply Operation
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
Description
The XS™ 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
FDMF6705V integrates a driver IC, two power
MOSFETs, and a bootstrap Schottky diode into a
thermally enhanced, ultra-compact 6x6mm PQFN
package.
Features
Over 93% Peak-Efficiency
High-Current Handling of 43A
High-Performance PQFN Copper Clip Package
3-State 5V PWM Input Driver
Shorter Propagation Delays than FDMF6704V
Shorter Dead Times than FDMF6704V
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 Compliant
Based on the Intel® 4.0 DrMOS Standard
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 has been
included to warn of a potential over-temperature
situation. The FDMF6705V also incorporates features,
such as Skip Mode (SMOD), for improved light-load
efficiency along with a 3-state PWM input for
compatibility with a wide range of PWM controllers.
Applications
High-Performance Gaming Motherboards
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
Networking and Telecom Microprocessor Voltage
Regulators
Small Form-Factor Voltage Regulator Modules
Ordering Information
Part
Number
Current
Rating
Input
Voltage
FDMF6705V
40A
12V
Switching
Frequency
Package
1000kHz
40-Lead, Clipbond PQFN DrMOS,
6.0x6.0mm Package
© 2011 Fairchild Semiconductor Corporation
FDMF6705V • Rev. 1.0 1
Top Mark
FDMF6705V
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/


Fairchild Semiconductor Electronic Components Datasheet

FDMF6705V Datasheet

High-Frequency DrMOS

No Preview Available !

Typical Application Circuit
VCIN
VDRV = 8V to 15 V
VDRV
C VDRV
C VCIN
VCIN
CGND
THW N#
5V
Linear
Reg .
Temp
Sense
DBoot
VIN
HDRV
BOOT
Q1
PHASE
PWM
Control
PW M
Enabled
OFF
Disabled ON
SMOD #
Control
VCIN
LDRV
VSW H
Q2
DISBL#
CGND
PGND
VIN = 3V to15V
CVIN
LOUT
COUT
VOUT
Figure 1. Typical Application Circuit
DrMOS Block Diagram
VDRV
VCC
UVLO
VIN
UVLO
5V
LDO
VCIN
DISB#
10µA
VCIN
PWM
RUP_PW M
RDN_PW M
Input
3-State
Logic
THWN#
Temp.
Sense
GH
Logic
GL
Logic
VCIN
10µA
D Boot
Level Shift
Deadtime
Control
BOOT
VIN
Q1
HS Power
MOSFET
GH
30k
PHASE
VSWH
VCIN
GL
30k
Q2
LS Power
MOSFET
CGND
SMOD#
Figure 2. DrMOS Block Diagram
PGND
© 2011 Fairchild Semiconductor Corporation
FDMF6705V • Rev. 1.0.1
2
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/


Part Number FDMF6705V
Description High-Frequency DrMOS
Maker Fairchild Semiconductor
PDF Download

FDMF6705V Datasheet PDF






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