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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


Pin Configuration
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.

The AAT1500 is available in 6-pin SOT-26 and
8-pin VQFN-8 package.


Applications
Palmtops
MP3 Player
Digital Still Cameras
Portable Media Player
Cell Phones and Smart Phones
Electronic Information Organizers



TOP
VIEW
SOT-26 PACKAGE
SW
GND
IE EN
OVP
VDD1
2
3 4
5
6
TOP
VIEW
VQFN-8 PACKAGE
SW
GND
IEEN
OVP
VDD
1
2
3
4 5
6
7
8
NC
GND1