DESCRIPTION

The LTC®3526-2/LTC3526B-2 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

■ VIN Operating Range: 0.5V to 5V

■ 1.6V to 5.25V VOUT Range

■ Up to 94 Efficiency

■ Output Disconnect

■ 2MHz Fixed Frequency Operation

■ VIN > VOUT Operation

■ Integrated Soft-Start

■ Current Mode Control with Internal Compensation

■ Burst Mode® Operation with 9µA Quiescent Current (LTC3526-2)

■ Low Noise PWM Operation (LTC3526B-2)

■ Internal Synchronous Rectifier

■ Logic Controlled Shutdown (IQ < 1µA)

■ Anti-Ringing Control

■ Low Profile (2mm × 2mm × 0.75mm) DFN-6 Package

APPLICATIONS

■ Medical Instruments

■ Flash-Based MP3 Players

■ Noise Canceling Headphones

■ Wireless Mice

■ Bluetooth Headsets