The LTC1515, 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. A unique architecture allows the parts to accommodate a wide input voltage range (2V to 10V) while maintaining ±4% regulation. Additional circuitry prevents excessive inrush current and output voltage ripple when large VIN to VOUT differentials are present. An internal power-on reset circuit forces the POR pin low on initial power-up. The POR output remains low until 200ms (typ) after VOUT is in regulation. The parts are short-circuit and over-temperature protected. Battery life is maximized by very low operating currents (ICC = 60µA typ, ICC<1µA in shutdown). All three parts are available in an SO-8 package. Applications * SIM Interface in GSM Cellular Telephones * Smart Card Readers * Local Power Supplies * Portable Equipment * 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 https://elecena.pl/product/250976/step-up-step-down-switched-capacitor-dc-dc-converters-with-reset 2007-03-02 https://elecena.pl/product/250976/step-up-step-down-switched-capacitor-dc-dc-converters-with-reset 2014-04-19 https://elecena.pl/product/250976/step-up-step-down-switched-capacitor-dc-dc-converters-with-reset 2025-01-21