DESCRIPTION
The LTC®3203/LTC3203-1/LTC3203B/LTC3203B-1 are low noise, high efficiency charge pump DC/DC converters capable of driving loads up to 500mA from a 2.7V to 5.5V input. Low external parts count (two flying capacitors and bypass capacitors at VIN and VOUT) make the LTC3203 family ideally suited for small, battery-powered applications.

FEATURES
■ Selectable Dual Mode Operation: 1:1.5 or 1:2
■ High Output Current: Up to 500mA
■ Low Noise Constant Frequency (1MHz/0.9MHz)
   Operation*
■ VIN Range: 2.7V to 5.5V
■ Adjustable Output Voltage (LTC3203/LTC3203B)
■ User Selectable Fixed Output Voltages: 4.5V or 5V
   (LTC3203-1 and LTC3203B-1)
■ Burst Mode® Operation with
   IQ ~ 120µA (LTC3203/LTC3203-1)
■ Constant Freqency Operation at All Loads
   (LTC3203B/LTC3203B-1)
■ Soft-Start Limits Inrush Current at Turn-On
■ Short-Circuit/Thermal Protection
■ Shutdown Disconnects Load from Input
■ Shutdown Current: < 1µA
■ Available in a 10-pin (3mm × 3mm) DFN Package

APPLICATIONS
■ High Current LED Backlight Supply for Cellphones/PDAs
■ Cellphone Camera Light Supply
■ General Purpose 3.3V or Li-Ion to 5V Supply
■ USB ON THE GO(OTG) Devices