IR3821AMPBF_08 IRF [International Rectifier], IR3821AMPBF_08 Datasheet

IR3821AMPBF_08

Manufacturer Part Number

IR3821AMPBF_08

Description

HIGHLY INTEGRATED 9A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR

Manufacturer

IRF [International Rectifier]

Datasheet

1.IR3821AMPBF_08.pdf (21 pages)

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11/04/08

SupIRBuck

Features

•

Applications

•

WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR

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

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)

Distributed Point-of-Loads

Server and Workstations

Embedded Systems

Storage Systems

DDR Applications

Graphics Cards

Game Consoles

Computing Peripheral Voltage Regulators

Fig. 1. Typical application diagram

Description

The IR3821A SupIRBuck

fully integrated and highly efficient DC/DC

regulator. The onboard switching controller and

MOSFETs make the IR3821A a space-efficient

solution, providing accurate power delivery for

low output voltage applications.

The IR3821A 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 IR3821A’s fixed 300kHz switching

frequency allows the use of small external

components.

The IR3821A 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.

HIGHLY INTEGRATED 9A

IR3821AMPbF

is an easy-to-use,

PD-60332

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