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IR3822AMPBF_08 Datasheet, PDF (1/21 Pages) International Rectifier – HIGHLY INTEGRATED 6A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR | |||
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PD-60345
PRELIMINARY IR3822AMPbF
SupIRBuckTM
HIGHLY INTEGRATED 6A
WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
Features
⢠Wide Input Voltage Range 2.5V to 21V
⢠Wide Output Voltage Range 0.6V to 12V
⢠Continuous 6A Load Capability
⢠300kHz High Frequency Operation
⢠Programmable Over-Current Protection
⢠Programmable PGood Output
⢠Hiccup Current Limit
Description
The IR3822A SupIRBuckTM is an easy-to-use,
fully integrated and highly efficient DC/DC
regulator. The onboard switching controller and
MOSFETs make the IR3822A a space-efficient
solution, providing accurate power delivery for
low output voltage applications.
⢠Precision Reference Voltage (0.6V)
⢠Programmable Soft-Start
⢠Pre-Bias Start-up
⢠Thermal Protection
⢠Thermally Enhanced Package
⢠Small Size 5mmx6mm QFN
⢠Pb-Free (RoHS Compliant)
Applications
The IR3822A operates from a single 4.5V to 14V
input supply and generates an output voltage
adjustable from 0.6V to 0.75*Vin at loads up to 6A.
A versatile regulator offering programmability of
startup time, power good threshold and current
limit, the IR3822Aâs fixed 300kHz switching
frequency allows the use of small external
components.
⢠Distributed Point-of-Loads
⢠Server and Workstations
⢠Embedded Systems
⢠Storage Systems
⢠DDR Applications
⢠Graphics Cards
⢠Game Consoles
⢠Computing Peripheral Voltage Regulators
The IR3822A also features important protection
functions, such as Pre-Bias startup, hiccup
current limit and thermal shutdown to provide the
required system level security in the event of fault
conditions.
Vin
PGood
Vcc
Vin
Vc HG
SW
PGood
SS/ SD
Gnd
OCSet
Vsns
Fb
PGnd Comp
01/24/08
Fig. 1. Typical application diagram
Vo
1
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