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AAT1500 Dataheets PDF



Part Number AAT1500
Manufacturers AAT
Logo AAT
Description CONSTANT CURRENT BOOST CONVERTER FOR 1 TO 4 WHITE LEDS
Datasheet AAT1500 DatasheetAAT1500 Datasheet (PDF)

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 z z z z z z z z z 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-25, SOT-26 & VQFN-8 Package Available General Descript.

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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 z z z z z z z z z 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-25, 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. 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. Pin Configuration TOP VIEW SW GND IE 1 2 3 5 VDD SW GND 4 EN SOT - 25 PACKAGE w 1 3 4 w IE w 8 7 6 5 1 2 3 .D 4 SW TOP VIEW t a OVP EN S a e h t e U 4 .c m o The AAT1500 is available in 5-pin SOT-25, 6-pin SOT-26 and 8-pin VQFN-8 package. 6 5 VDD Applications z z z z z z Palmtops MP3 Player Digital Still Cameras Portable Media Player Cell Phones and Smart Phones Electronic Information Organizers SOT - 26 PACKAGE TOP VIEW OVP VDD 2 EN GND GND1 IE NC VQFN-8 PACKAGE – – a – ¥xÆWÃþ¤ñ¬ì§ÞªÑ¥÷¦³-½q .D. – Advanced Analog Technology, w Inc Page 1 of 17 t h S a t e e 4U . m o c w w V 0.3 Advanced Analog Technology, Inc. AAT1500 Pin Description PIN NO SOT-25 1 2 3 4 5 PIN NO SOT-26 1 2 3 4 5 6 PIN NO VQFN-8 8 4 6 3 1 2 7 5 NAME SW GND IE EN OVP VDD GND1 NC I/O O I I I Switch Pin Ground Inverting Input Pin of Error Amplifier Chip Enable/Disable(Active High) Over Voltage Protection Supply Voltage SW MOS Ground NC DESCRIPTION Absolute Maximum Ratings (Note 1) CHARACTERISTICS Supply Voltage SYMBOL VDD VALUE − 0.3 to 7 − 0.3 to 21 − 0.3 to 6 UNIT V V V o o o o SW, OVP to GND Other I/O Pin Voltage Junction Temperature Storage Temperature Range Operating Temperature Range Lead Temperature Tstorage 125 − 45 to 125 − 40 to 85 C C C C TC TL 260 Recommended Operating Conditions CHARACTERISTICS Supply Voltage SYMBOL VDD VALUE UNIT 2.6 to 6 V Dissipation Ratings CHARACTERISTICS PACKAGE SYMBOL VALUE UNIT o o Package Thermal Resistance Power Dissipation, TC = 25 oC SOT-26 VQFN-8 SOT-26 VQFN-8 θ JA θ JA Pd Pd 208 50 0.48 2 C/W C/W W W – – – ¥xÆWÃþ¤ñ¬ì§ÞªÑ¥÷¦³-½q Advanced Analog Technology, Inc. – Page 2 of 17 V 0.3 Advanced Analog Technology, Inc. AAT1500 Electrical Characteristics, VDD = 3.6 V, TC = 25 oC (Unless Otherwise Specified) Operating Condition PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Supply Voltage Under Voltage Lockout Operating Current Quiescent Current Shutdown Current Osci.


28F320W18 AAT1500 80N02


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