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AAT1500

CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS

Unspecified 

Advanced Analog Technology, Inc.

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

SOT-26 & VQFN-8 Package Available

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 Ion 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. Protection feature includes

output over voltage protection. The AAT1500

consists of a 0.1µA shutdown current, and HV

internal switch. Input supple range allows operation

from 2.6V to 6V.

Pin Configuration

The AAT1500 is available in 6-pin SOT-26 and

8-pin VQFN-8 package.

TOP

VIEW

TOP

VIEW

SW 1

GND 2

6 VDD OVP 1

VDD 2

5 OVP

EN 3

8 SW

7 GND1

6 IE

IE

3

4 EN GND 4

5 NC

SOT-26 PACKAGE

VQFN-8 PACKAGE

Applications

Palmtops

MP3 Player

Digital Still Cameras

Portable Media Player

Cell Phones and Smart Phones

Electronic Information Organizers

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– Advanced Analog Technology, Inc. –

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