DrMOS Module. FDMF6705 Datasheet

FDMF6705 Datasheet PDF, Equivalent


Part Number

FDMF6705

Description

High-Frequency DrMOS Module

Manufacture

Fairchild Semiconductor

Total Page 18 Pages
PDF Download
Download FDMF6705 Datasheet PDF


FDMF6705 Datasheet
March 2011
FDMF6705 – XS™ DrMOS — 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 43A
High-Performance PQFN Copper Clip Package
3-State 5V PWM Input Driver
Shorter Propagation Delays than FDMF6704
Shorter Dead Times than FDMF6704
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
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
FDMF6705 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 has been
included to warn of a potential over-temperature
situation. The FDMF6705 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
FDMF6705
Current
Rating
38A
Input
Voltage
19V
Maximum
Frequency
Package
1000kHz
40-Lead, Clipbond PQFN DrMOS,
6.0x6.0mm Package
© 2011 Fairchild Semiconductor Corporation
FDMF6705 • Rev. 1.0 0
Top Mark
FDMF6705
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/

FDMF6705 Datasheet
Typical Application Circuit
V5V
CVDRV
CVIN
VIN
3V ~ 20.5V
DISB#
PWM Input
OFF
ON
Open-Drain
Output
DISB#
VDRV
VCIN
VIN
BOOT
RBOOT
PW M
SMOD#
FDMF6705
PHASE
VSW H
THW N#
CGND
PGND
CBOOT
LOUT
COUT
Figure 1. Typical Application Circuit
VOUT
DrMOS Block Diagram
VCIN
UVLO
DISB#
10µA
VCIN
RUP_PWM
PWM
RDN_PWM
Input
3-State
Logic
THWN#
Temp.
Sense
VDRV
GH
Logic
VCIN
GL
Logic
10µA
DBoot
Level Shift
Deadtime
Control
BOOT
VIN
Q1
HS Power
MOSFET
GH
30k
PHASE
VDRV
VSWH
GL
30k
Q2
LS Power
MOSFET
CGND
© 2011 Fairchild Semiconductor Corporation
FDMF6705 • Rev. 1.0.0
SMOD#
Figure 2. DrMOS Block Diagram
2
PGND
www.fairchildsemi.com
Free Datasheet http://www.datasheet4u.com/


Features Datasheet pdf FDMF6705 - XS™ DrMOS — Extra-Small H igh-Performance, High-Frequency DrMOS M odule March 2011 FDMF6705 – XS™ D rMOS — Extra-Small, HighPerformance, High-Frequency DrMOS Module Benefits Ul tra-Compact 6x6mm PQFN, 72% Space-Savin g Compared to Conventional Discrete Sol utions Fully Optimized System Efficienc y Clean Switching Waveforms with Minima l Ringing High-Current Handling Descri ption The XS™ DrMOS family is Fairchi ld’s next-generation, fully optimized , ultra-compact, integrated MOSFET plus driver power stage solutions for high- current, highfrequency, synchronous buc k DC-DC applications. The FDMF6705 inte grates a driver IC, two power MOSFETs, and a bootstrap Schottky diode into a t hermally enhanced, ultra-compact 6x6mm PQFN package. With an integrated approa ch, the complete switching power stage is optimized with regards to driver and MOSFET dynamic performance, system ind uctance, and Power MOSFET RDS(ON). XS DrMOS uses Fairchild's high-performance PowerTrench® MOSFET technology, which.
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