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FDMF5823DC — Smart Power Stage (SPS) Module with Integrated Thermal Warning and Thermal Shutdown
May 2016
FDMF5823DC – Smart Power Stage (SPS) Module
with Integrated Thermal Warning and Thermal Shutdown
Features
Ultra-Compact 5 mm x 5 mm PQFN Copper-Clip
Package with Flip Chip Low-Side MOSFET and
Dual Cool Architecture
Description
The SPS 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
FDMF5823DC integrates a driver IC with a bootstrap
Schottky diode, two power MOSFETs, and a thermal
monitor into a thermally enhanced, ultra-compact 5 mm,
x 5 mm package.
With an integrated approach, the SPS switching power
stage is optimized for driver and MOSFET dynamic
performance, minimized system inductance, and power
MOSFET R
DS(ON)
. The SPS family uses Fairchild's high-
®
performance PowerTrench
MOSFET technology,
which reduces switch ringing, eliminating the need for a
snubber circuit in most buck converter applications.
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. A thermal shutdown function turns off the
driver if an over-temperature condition occurs. The
FDMF5823DC incorporates an Auto-DCM Mode (ZCD#)
for improved light-load efficiency. The FDMF5823DC
also provides a 3-state 5 V PWM input for compatibility
with a wide range of PWM controllers.
High Current Handling: 55 A
3-State 5 V PWM Input Gate Driver
Dynamic Resistance Mode for Low-Side Drive
(LDRV) Slows Low-Side MOSFET during Negative
Inductor Current Switching
Auto DCM (Low-Side Gate Turn Off) Using
ZCD# Input
Thermal Warning (THWN#) to Warn Over-
Temperature of Gate Driver IC
Thermal Shutdown (THDN)
HS-Short Detect Fault# / Shutdown
Dual Mode Enable / Fault# Pin
Internal Pull-Up and Pull-Down for ZCD# and
EN Inputs, respectively
Fairchild PowerTrench MOSFETs for Clean
Voltage Waveforms and Reduced Ringing
Fairchild SyncFET™ Technology (Integrated
Schottky Diode) in Low-Side MOSFET
Integrated Bootstrap Schottky Diode
Optimized / Extremely Short Dead-Times
Under-Voltage Lockout (UVLO) on VCC
Optimized for Switching Frequencies up to 1.5 MHz
PWM Minimum Controllable On-Time: 30 ns
Low Shutdown Current: < 3 µA
Optimized FET Pair for Highest Efficiency:
10 ~ 15% Duty Cycle
Operating Junction Temperature Range:
-40°C to +125°C
Fairchild Green Packaging and RoHS Compliance
®
Applications
Servers and Workstations, V-Core and Non-V-Core
DC-DC Converters
Desktop and All-in-One Computers, V-Core and
Non-V-Core DC-DC Converters
High-Performance Gaming Motherboards
High-Current DC-DC Point-of-Load Converters
Networking and Telecom Microprocessor Voltage
Regulators
Small Form-Factor Voltage Regulator Modules
Ordering Information
Part Number
FDMF5823DC
Current Rating
55 A
Package
31-Lead, Clip Bond PQFN SPS, 5.0 mm x 5.0 mm Package
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