AAT1500 查看數據表（PDF） - Advanced Analog Technology, Inc.

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AAT1500

CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS

Advanced Analog Technology, Inc. 

Advanced Analog Technology, Inc.

July 2008

AAT1500

Product information presented is current as of publication date. Details are subject to change without notice

CONSTANT CURRENT BOOST CONVERTER

FOR 1 TO 4 WHITE LEDS

FEATURES

Up to 4 LEDs at 2.8V Supply

High Efficiency (85%)

Output Over Voltage Protection

HV Internal Switch

1 MHz PWM Switching Frequency

Uses Tiny 1 mm Height Inductor

2.6V to 6V Input Range

0.1µA Shutdown Current

SOT23-5 , SOT23-6,TSOT23-6, and VSON8

Packages Available

APPLICATIONS

Palmtops

MP3 Player

Digital Still Cameras

Portable Media Player

Cell Phones and Smart Phones

Electronic Information Organizers

TYPICAL APPLICATION

GENERAL DESCRIPTION

The AAT1500 is a step-up converter that provides a

solution to drive 1 to 4 white LEDs with a constant

current from a lithium cell, and its switching frequency is

fixed at 1 MHz.

The AAT1500 offers a low 0.25V reference, which

minimizes power loss in the current setting resistor and

improves efficiency. Except in SOT23-5 package,

protection features include output over voltage

protections. The AAT1500 consists of a 0.1µA shutdown

current, and HV internal switch. Input supply range

allows operation from 2.6V to 6V.

The AAT1500 is available in SOT23-5, SOT23-6,

TSOT23-6 and VSON8 packages.

PIN CONFIGURATION

R1

=

VIE

IR1

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– Advanced Analog Technology, Inc. –

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