AOZ1081AI datasheet(1/16 Pages) AOSMD

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Rev. 1.1 April 2009

www.aosmd.com

Page 1 of 16

AOZ1081

EZBuck™ 1.8A High Efficiency

Constant Current Regulator for LEDs

General Description

The AOZ1081 is a high efficiency, simple to use, 1.8A

buck regulator for White LED. The AOZ1081 works from

a 4.5V to 16V input voltage range, and provides up to

1.8A of continuous output current with an output voltage

adjustable down to 0.25V.

The AOZ1081 comes in an SO-8 package and is rated

over a -40°C to +85°C ambient temperature range.

Features

● 4.5V to 16V operating input voltage range

● 100 mΩ internal PFET switch for high efficiency:

up to 95%

● Internal Schottky Diode

● Internal soft start

● 0.25V internal reference with ±5% accuracy over

temperature

● 1.8A continuous output current

● Fixed 1MHz PWM operation

● Cycle-by-cycle current limit

● Short-circuit protection

● Under voltage lockout

● Output over voltage protection

● Thermal shutdown

● Small size SO-8 package

Applications

● Buck regulator for white LEDs

● Landscape lighting

● Flashlights

● Battery powered backlight applications

Typical Application

Figure 1.

LX

VIN

VOUT

FB

PGND

EN

COMP

AGND

C1

22µF

C3

22µF

RFB

HB

LED

R1

C2

4.7µH

VIN

AOZ1081

Số phần tương tự - AOZ1081AI

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