DESCRIPTION

The A7534 is a step-up converter that provides a boosted output voltage from a low voltage source. Because of its proprietary design, it starts up at a very low input voltage down to 0.9V, and only consumes 15uA at standby, making it an ideal choice for single cell alkaline/NiMH battery operations.

A switching frequency of 1MHz minimizes solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count.

The A7534 is available in SOT-23 and SOT89-3 packages.

FEATURES

? Efficiency up to 9 5 V IN 2.7 V , V OUT 3.3 V

? Typical 15uA standby current

? 1MHz Switching Frequency allows small

inductor and output cap

? Input boost strapping all ows using small or no

input cap

? Low Vin Start up Voltage down to 0.9V Ideal for

Single Alkaline Cell operations

? Max imum Output Current up to 300mA

? Low Noise PWM control

? Internally C ompensated Current Mode Control

? Internal Sync hronous Rectifier

? Available in SOT-23 and SOT89-3 p ackage s

APPLICATION

? One to Thre e Cell Battery Operated Devices

? Medical Instruments

? Bluetooth Headsets

? Flash Based MP3 Players

? Noise Canceling Headphones