DESCRIPTION
The LTC®3526/LTC3526B are synchronous, fixed frequency step-up DC/DC converters with output disconnect. Synchronous rectification enables high efficiency in the low profile 2mm × 2mm DFN package. Battery life in single AA/AAA powered products is extended further with an 850mV start-up voltage and operation down to 500mV once started.

FEATUREs
■ Delivers 3.3V at 100mA from a Single Alkaline/NiMH Cell or 3.3V at 200mA from Two Cells
■ VIN Start-Up Voltage: 850mV
■ 1.6V to 5.25V VOUT Range
■ Up to 94% Efficiency
■ Output Disconnect
■ 1MHz Fixed Frequency Operation
■ VIN > VOUT Operation
■ Integrated Soft-Start
■ Current Mode Control with Internal Compensation
■ Automatic Burst Mode® Operation with 9µA Quiescent Current (LTC3526)
■ Low Noise PWM Operation (LTC3526B)
■ Internal Synchronous Rectifier
■ Logic Controlled Shutdown (IQ < 1µA)
■ Anti-Ringing Control
■ Low Profile (2mm × 2mm × 0.75mm) DFN Package

APPLICATIONS
■ Medical Instruments
■ Flash-Based MP3 Players
■ Noise Canceling Headphones
■ Wireless Mice
■ Bluetooth Headsets