IR3800MPBF Datasheet, PDF (1/21 Pages) International Rectifier – HIGHLY INTEGRATED 12A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR

PD-60352
IR3800MPbF
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
• 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 IR3800 SupIRBuck^TM is an easy-to-use, fully
integrated and highly efficient DC/DC regulator.
The onboard switching controller and MOSFETs
make the IR3800 a space-efficient solution,
providing accurate power delivery for low output
voltage applications.
The IR3800 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
12A.
A versatile regulator offering programmability of
startup time and current limit, the IR3800’s fixed
600kHz 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 IR3800 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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