April 2012
FDMF6823B — Extra-Small, High-Performance,
High-Frequency DrMOS Module
Benefits
Description
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Ultra-Compact 6x6mm PQFN, 72% Space-Saving
Compared to Conventional Discrete Solutions
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
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Fully Optimized System Efficiency
Clean Switching Waveforms with Minimal Ringing
High-Current Handling
FDMF6823B integrates
a
driver IC, two power
MOSFETs, and a bootstrap Schottky diode into a
thermally enhanced, ultra-compact 6x6mm package.
Features
With an integrated approach, the complete switching
power stage is optimized with regard to driver and
MOSFET dynamic performance, system inductance,
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Over 93% Peak-Efficiency
and power MOSFET RDS(ON)
. XS™ DrMOS uses
High-Current Handling: 55A
Fairchild's high-performance PowerTrench® MOSFET
technology, which dramatically reduces switch ringing,
eliminating the need for snubber circuit in most buck
converter applications.
High-Performance PQFN Copper-Clip Package
3-State 5V PWM Input Driver
Skip-Mode SMOD# (Low-Side Gate Turn Off) Input
A driver IC with reduced dead times and propagation
delays further enhances the performance. A thermal
warning function warns of a potential over-temperature
situation. The FDMF6823B also incorporates a Skip
Mode (SMOD#) for improved light-load efficiency. The
FDMF6823B also provides a 3-state 5V PWM input for
compatibility with a wide range of PWM controllers.
Thermal Warning Flag for Over-Temperature
Condition
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Driver Output Disable Function (DISB# Pin)
Internal Pull-Up and Pull-Down for SMOD# and
DISB# Inputs, Respectively
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Fairchild PowerTrench® Technology MOSFETs for
Clean Voltage Waveforms and Reduced Ringing
Applications
Fairchild SyncFET™ (Integrated Schottky Diode)
Technology in Low-Side MOSFET
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High-Performance Gaming Motherboards
Compact Blade Servers, V-Core and Non-V-Core
DC-DC Converters
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Integrated Bootstrap Schottky Diode
Adaptive Gate Drive Timing for Shoot-Through
Protection
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Desktop Computers, V-Core and Non-V-Core
DC-DC Converters
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Under-Voltage Lockout (UVLO)
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Workstations
Optimized for Switching Frequencies up to 1MHz
Low-Profile SMD Package
High-Current DC-DC Point-of-Load Converters
Networking and Telecom Microprocessor Voltage
Regulators
Fairchild Green Packaging and RoHS Compliance
Based on the Intel® 4.0 DrMOS Standard
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Small Form-Factor Voltage Regulator Modules
Ordering Information
Part Number Current Rating
Package
Top Mark
FDMF6823B
55A
40-Lead, Clipbond PQFN DrMOS, 6.0mm x 6.0mm Package
FDMF6823B
© 2011 Fairchild Semiconductor Corporation
FDMF6823B • Rev. 1.0.2
www.fairchildsemi.com
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