The LTC1522 is a micropower charge pump DC/DC converter that produces a regulated 5V output from a 2.7V to 5V input supply. Extremely low supply current (6µA typical with no load, <1µA in shutdown) and low external parts count (one 0.22µF flying capacitor and two 10µF capacitors at VIN and VOUT) make the LTC1522 ideally suited for small, light load battery-powered applications. Typical efficiency (VIN = 3V) exceeds 75% with load currents between 50µA and 20mA. Modulating the SHDN pin keeps the typical efficiency above 75% with load currents all the way down to 10µA. The LTC1522 has thermal shutdown and can survive a continuous short from VOUT to GND. In shutdown the load is disconnected from VIN. The part is available in 8-pin MSOP and SO packages. The LTC1522 is pin compatible with the LTC1516 in applications where VIN ≥ 2.7V and IOUT ≤ 20mA. Applications * SIM Interface Supplies for GSM Cellular Telephones * Li-Ion Battery Backup Supplies * Local 3V to 5V Conversion * Smart Card Readers * PCMCIA Local 5V Supplies * Ultralow Power: Typical Operating ICC = 6µA * Short-Circuit/Thermal Protected * Regulated 5V ±4% Output Voltage * 2.7V to 5V Input Range * No Inductors * Very Low ICC in Shutdown: <1µA * Output Current: * 10mA (VIN ≥ 2.7V) * 20mA (VIN ≥ 3V) * Shutdown Disconnects Load from VIN * Internal Oscillator: 700kHz * Compact Application Circuit (<0.1 in2) * 8-Pin MSOP and SO Packages https://elecena.pl/product/251042/micropower-regulated-5v-charge-pump-dc-dc-converter 2007-03-02 https://elecena.pl/product/251042/micropower-regulated-5v-charge-pump-dc-dc-converter 2016-04-27 https://elecena.pl/product/251042/micropower-regulated-5v-charge-pump-dc-dc-converter 2025-01-21