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PD-xxxxx
SupIRBuck
TM
HIGHLY INTEGRATED 6A
IR3822AMPbF
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
• 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
• Distributed Point-of-Loads
• Server and Workstations
• Embedded Systems
• Storage Systems
• DDR Applications
• Graphics Cards
• Game Consoles
• Computing Peripheral Voltage Regulators
Description
The IR3822A SupIRBuckTMis 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.
The IR3822A operates from a 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 IR3822A’s fixed 300kHz switching
frequency allows the use of small external
components.
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 faul t
conditions.
11/28/07
Fig. 1. Typical application diagram
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