DESCRIPTION
The LTC®3528/LTC3528B are synchronous, fixed frequency step-up DC/DC converters with output disconnect. High efficiency synchronous rectification, in addition to a 700mV start-up voltage and operation down to 500mV once started, provides longer run time for single or multiple cell battery-powered products.

FEATURES
■ Delivers 3.3V at 200mA from a Single Alkaline/NiMH Cell or 3.3V at 400mA from Two Cells
■ VIN Start-Up Voltage: 700mV
■ 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
■ Burst Mode® Operation with 12µA Quiescent Current (LTC3528)
■ Low Noise PWM Operation (LTC3528B)
■ Internal Synchronous Rectifier
■ Logic Controlled Shutdown: <1µA
■ Anti-Ringing Control
■ Low Profile (3mm × 2mm × 0.75mm) DFN Package

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