特点
Ultralow Power: Typical Operating I
CC
= 6μA
Short-Circuit/Thermal Protected
Regulated 5V ±4% Output Voltage
2.7V to 5V Input Range
No Inductors
Very Low I
CC
in Shutdown: <1μA
Output Current: 10mA (V
IN
>/=2.7V) 20mA (V
IN
>/=3V)
Shutdown Disconnects Load from V
IN
Internal Oscillator: 700kHz
Compact Application Circuit (<0.1 in
2
)
8-Pin MSOP and SO Packages
典型应用
典型应用
描述
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