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IR3801AMPBF Datasheet, PDF (1/21 Pages) International Rectifier – SupIRBuckTM | |||
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PD-60355
IR3801AMPbF
SupIRBuckTM
HIGHLY INTEGRATED 9A
WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
Features
⢠Wide Input Voltage Range 2.5V to 21V
⢠Wide Output Voltage Range 0.6V to 12V
⢠Continuous 9A Load Capability
⢠300kHz High Frequency Operation
⢠Programmable Over-Current Protection
⢠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
Description
The IR3801A SupIRBuckTM is an easy-to-use,
fully integrated and highly efficient DC/DC
regulator. The onboard switching controller and
MOSFETs make the IR3801A a space-efficient
solution, providing accurate power delivery for
low output voltage applications.
The IR3801A operates from a single 4.5V to 14V
input supply and generates an output voltage
adjustable from 0.6V to 0.8*Vin at loads up to 9A.
A versatile regulator offering programmability of
startup time, power good threshold and current
limit, the IR3801Aâs fixed 300kHz switching
frequency allows the use of small external
components.
⢠Game Consoles
⢠Set-top Boxes
⢠Graphics Cards
⢠LCD TVs
⢠Desktop PCs
⢠Distributed Point-of-Loads
⢠Embedded Systems
⢠Computing Peripheral Voltage Regulators
The IR3801A 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
11/04/08
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