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AAT - CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS

Numéro de référence AAT1500
Description CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS
Fabricant AAT 
Logo AAT 





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AAT1500 fiche technique
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
General Description
z Up to 4 LEDs at 2.8V Supply
mz High Efficiency (85%)
oz Output Over Voltage Protection
.cz HV Internal Switch
z 1 MHz PWM Switching Frequency
Uz Uses Tiny 1 mm Height Inductor
t4z 2.6V to 6V Input Range
ez 0.1µA Shutdown Current
ez SOT-25, SOT-26 & VQFN-8
hPackage Available
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. Except in SOT-25 package,
protection features include output over voltage
protections. The AAT1500 consists of a 0.1µA
shutdown current, and HV internal switch. Input
supple range allows operation from 2.6V to 6V.
taSPin Configuration
TOP
aVIEW
.DSW 1
5 VDD SW
GND 2
GND
wIE 3
4 EN IE
TOP
VIEW
16
VDD
2 5 OVP
3 4 EN
wSOT- 25 PACKAGE SOT- 26 PACKAGE
w TOP
VIEW
omOVP 1
8 SW
.cVDD 2
7 GND1
t4UEN 3
6 IE
eGND 4
5 NC
The AAT1500 is available in 5-pin SOT-25, 6-pin
SOT-26 and 8-pin VQFN-8 package.
Applications
z Palmtops
z MP3 Player
z Digital Still Cameras
z Portable Media Player
z Cell Phones and Smart Phones
z Electronic Information Organizers
SheVQFN-8 PACKAGE
ata– –
.DAdvanced Analog Technology, Inc.
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