IR3820MPBF Datasheet, PDF (1/1 Pages) International Rectifier – HIGHLY INTEGRATED 12A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR

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IR3820MPbF
SupIRBuck^TM
HIGHLY INTEGRATED 12A
WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
Features
• Wide Input Voltage Range 2.5V to 21V
• Wide Output Voltage Range 0.6V to 12V
• Continuous 12A Load Capability
• 600kHz 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 IR3820 SupIRBuck^TM is an easy-to-use, fully
integrated and highly efficient DC/DC regulator.
The onboard switching controller and MOSFETs
make the IR3820 a space-efficient solution,
providing accurate power delivery for low output
voltage applications.
The IR3820 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
12A.
A versatile regulator offering programmability of
startup time, power good threshold and current
limit, the IR3820’s fixed 600kHz switching
frequency allows the use of small external
components.
The IR3820 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.
Fig. 1. Typical application diagram
11/28/07
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