描述
The LTC®1522 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 V
IN and V
OUT) make the
LTC1522 ideally suited for small, light load battery-powered applications. Typical efficiency (V
IN = 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 V
OUT to GND. In shutdown the load is disconnected from V
IN. The part is available in 8-pin MSOP and SO packages. The LTC1522 is pin compatible with the LTC1516 in applications where V
IN >/= 2.7V and I
OUT
