特点
Ultralow Power: Typical Operating ICC = 12μA
Short Circuit/Thermal Protection
Regulated 5V ±4% Output
2V to 5V Input Range
No Inductors
ICC in Shutdown: <1μA
Output Current:20mA (VIN > 2V)
50mA (VIN > 3V)
Shutdown Disconnects Load from VIN
Internal Oscillator: 600kHz
Compact Application Circuit (0.1 in2)
8-Pin SO Package
典型应用
典型应用
描述
描述 The LTC?1516 is a micropower charge pump DC/DC converter that produces a regulated 5V output from a 2V to 5V supply. Extremely low supply current (12μA typical with no load, < 1μA in shutdown) and low external parts count (two 0.22μF flying capacitors and two 10μF capacitors at V IN and V OUT ) make the LTC1516 ideally suited for small, light load battery-powered applications. Typical efficiency (V IN = 3V) exceeds 70% with load currents between 50μA and 50mA. Modulating the SHDN pin keeps the typical efficiency above 70% with load currents all the way down to 10μA. The LTC1516 operates as either a doubler or a tripler depending on V IN and output load conditions to improve overall efficiency. The part has thermal shutdown and can survive a continuous short from V OUT to GND. In shut-down the load is disconnected from V IN . The LTC1516 is available in an 8-pin SO package in both commercial and industrial temperature grades.