DESCRIPTION
The LTC®3527/LTC3527-1 are dual high efficiency, step-up DC/DC converters in a space saving 16-lead 3mm × 3mm QFN package. Battery life is maximized with a 700mV start-up voltage and operation down to 500mV once started. The SHDN and PGOOD pins enable the converters to be sequenced or started together.

FEATURES
■ Dual Synchronous Step-Up DC/DC Converters
■ Delivers 3.3V at 200mA/100mA from one Alkaline/
   NiMH Cell, or 3.3V at 400mA/200mA from Two Cells
■ VIN Start-Up Voltage: 700mV
■ 0.5V to 5V VIN Range after Start-Up
■ 1.6V to 5.25V VOUT Range
■ Output Disconnect in Shutdown
■ VIN > VOUT Operation
■ 1.2MHz or 2.2MHz Operation
■ Up to 94% Effi ciency
■ 12µA Quiescent Current in Burst Mode® Operation
■ Inrush Current Limiting and Soft-Start
■ Internal Synchronous Rectifi ers
■ Logic-Controlled Shutdown (< 2µA)
■ Quick VOUT Discharge (LTC3527-1)
■ 16-Lead, 0.75mm × 3mm × 3mm QFN Package

APPLICATIONS
■ MP3/Personal Media Players
■ Noise Canceling/Bluetooth Headsets
■ Wireless Mice
■ Portable Medical Instruments