DESCRIPTION
The LTC®3521 combines a 1A buck-boost DC/DC converter and dual 600mA synchronous buck DC/DC converters. The 1.1MHz switching frequency minimizes the solution footprint while maintaining high efficiency. All three converters feature soft-start and internal compensation to minimize the solution footprint and simplify the design process.

FEATUREs
■ Three High Efficiency DC/DC Converters:
   Buck-Boost (VOUT: 1.8V to 5.25V, IOUT: 1A)
   Dual Buck (VOUT: 0.6V to VIN, IOUT: 600mA)
■ 1.8V to 5.5V Input Voltage Range
■ Pin-Selectable Burst Mode® Operation
■ 30µA Total Quiescent Current in Burst Mode
   Operation
■ Independent Power Good Indicator Outputs
■ Integrated Soft-Start
■ Thermal and Overcurrent Protection
■ <2µA Current in Shutdown
■ Small 4mm × 4mm QFN and Thermally Enhanced
   TSSOP Packages

APPLICATIONS
■ Bar Code Readers
■ Medical Instruments
■ Handy Terminals
■ PDAs, Handheld PCs
■ GPS Receivers