3A Highly Integrated SupIRBuck® Single-Input
IR3823
Voltage, Synchronous Buck Regulator
FEATURES
DESCRIPTION
The IR3823 SupIRBuck® is a 3A easy-to-use, fully
integrated and highly efficient synchronous Buck
Single input voltage range from 5V to 21V
Wide Input voltage range from 1.0V to 21V with
regulator
intended
for
Point-Of-Load
(POL)
external VCC bias voltage
applications.
Output voltage from 0.6V to 0.86% of PVin
Enhanced line/load regulation with feedforward
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
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
shut-down, etc.
The IR3823 is offered in a small
3.5mm x 3.5mm PQFN package with excellent thermal
performance.
Output over voltage protection
Enable Input with Under-Voltage Lockout
(UVLO)
APPLICATIONS
VCC Under-Voltage Lockout (UVLO)
Enhanced Pre-bias start-up
Computing Applications
Set Top Box Applications
Storage Applications
Integrated MOSFET drivers and Bootstrap
Diode
Thermal shut-down
Data Center Applications
Telecom Applications
-40°C to 125°C operating junction temperature
3.5mm x 3.5mm PQFN package
Distributed Point of Load Power Architectures
Lead-free, Halogen-free and RoHS6 Compliant
ORDERING INFORMATION
Standard Pack
Base Part Number
Package Type
Orderable Part Number
Form
Quantity
750
IR3823
IR3823
PQFN 3.5 mm x 3.5 mm
PQFN 3.5 mm x 3.5 mm
Tape and Reel
Tape and Reel
IR3823MTR1PBF
IR3823MTRPBF
4000
IR3823
PBF – Lead Free
TR/TR1 – Tape and Reel
M – PQFN Package
1
www.irf.com
© 2012 International Rectifier
August 1, 2013