DESCRIPTION
The LTC®1515, LTC1515-3/5 and LTC1515-3.3/5 are micropower switched capacitor DC/DC converters that produce a regulated output voltage by either stepping up or stepping down the input voltage. Output voltage is adjustable using an external resistor divider (LTC1515) or programmable to either 3V/5V (LTC1515-3/5) or 3.3V/5V (LTC1515-3.3/5) using a logic pin.

FEATURES
■ Adjustable/Selectable 3V, 3.3V or 5V Output Voltages
■ 2V to 10V Input Voltage Range
■ Up to 50mA Output Current
■ Only Three External Capacitors Required
■ Soft Start Limits Inrush Current at Turn-On
■ Low Operating Current: 60µA
■ Very Low Shutdown Current: < 1µA
■ Shutdown Disconnects Load from VIN
■ VOUT Programmable to 3V/5V or 3.3V/5V
■ Short-Circuit and Overtemperature Protected
■ 650kHz Switching Frequency
■ Open-Drain Power-On Reset Output
■ Available in SO-8 Package

APPLICATIONS
■ SIM Interface in GSM Cellular Telephones
■ Smart Card Readers
■ Local Power Supplies
■ Portable Equipment