AAT1500 Datasheet, PDF (1/11 Pages) List of Unclassifed Manufacturers – CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS

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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