IR3823 Datasheet, PDF (1/41 Pages) International Rectifier – 3A Highly Integrated SupIRBuck Single-Input Voltage, Synchronous Buck Regulator

3A Highly Integrated SupIRBuck^® Single-Input
Voltage, Synchronous Buck Regulator
IR3823
FEATURES
 Single input voltage range from 5V to 21V
 Wide Input voltage range from 1.0V to 21V with
external V_CC bias voltage
 Output voltage from 0.6V to 0.86% of PVin
 Enhanced line/load regulation with feedforward
 Programmable switching frequency up to
1.5MHz
 Three user selectable soft-start time options
 Thermally compensated current limit with robust
hiccup mode over current protection
 Synchronization to an external clock
 Precise reference voltage (0.6V+/-0.6%)
 Open-drain PGood indication
 Output over voltage protection
 Enable Input with Under-Voltage Lockout
(UVLO)
 V_CC Under-Voltage Lockout (UVLO)
 Enhanced Pre-bias start-up
 Integrated MOSFET drivers and Bootstrap
Diode
 Thermal shut-down
 -40°C to 125°C operating junction temperature
 3.5mm x 3.5mm PQFN package
 Lead-free, Halogen-free and RoHS6 Compliant
DESCRIPTION
The IR3823 SupIRBuck^® is a 3A easy-to-use, fully
integrated and highly efficient synchronous Buck
regulator intended for Point-Of-Load (POL)
applications.
The IR3823 features programmable switching
frequency from 300kHz to 1.5MHz, three selectable
soft-start time options, and smooth synchronization to
an external clock. The IR3823 uses voltage mode
control employing a proprietary PWM modulator,
allowing high control bandwidth and fast loop response
with less output capacitors. The other important
functions include thermally compensated over current
protection, output over voltage protection and thermal
shut-down, etc. The IR3823 is offered in a small
3.5mm x 3.5mm PQFN package with excellent thermal
performance.
APPLICATIONS
 Computing Applications
 Set Top Box Applications
 Storage Applications
 Data Center Applications
 Telecom Applications
 Distributed Point of Load Power Architectures
ORDERING INFORMATION
Base Part Number
IR3823
IR3823
Package Type
PQFN 3.5 mm x 3.5 mm
PQFN 3.5 mm x 3.5 mm
IR3823      
Standard Pack
Form
Quantity
Tape and Reel
750
Tape and Reel
4000
Orderable Part Number
IR3823MTR1PBF
IR3823MTRPBF
PBF – Lead Free
TR/TR1 – Tape and Reel
M – PQFN Package
1 www.irf.com © 2012 International Rectifier
August 1, 2013