Datasheet Linear Technology LTC1261LCS8-4#PBF

LTC1261L
Switched Capacitor
Regulated Voltage Inverter
FEATURES DESCRIPTION Regulated Negative Voltage from a Single Positive Supply
n REG Pin Indicates Output is in Regulatio Adjustable or Fixed Output Voltages
n Output Regulation: В±4.5%
n Supply Current: 650ВµA Typ
n Shutdown Mode Drops Supply Current to 5ВµA
n Up to 20mA Output Current
n Requires Only Three or Four External Capacitors
n Available in MS8 and SO-8 Packages The LTCВ®1261L is a switched-capacitor voltage inverter
designed to provide a regulated negative voltage from a
single positive supply. The LTC1261L operates from a
single 2.7V to 5.25V supply and provides an adjustable
output voltage from –1.23V to – 5V. The LTC1261L-4/
LTC1261L-4.5 needs a single 4.5V to 5.25V supply and
provides a fixed output voltage of –4V to –4.5V respectively. Three external capacitors are required: a 0.1µF flying
capacitor and an input and output bypass capacitors. An
optional compensation capacitor at ADJ (COMP) can be
used to reduce the output voltage ripple. APPLICATIONS Each version of the LTC1261L will supply up to 20mA
output current with guaranteed output regulation of В±4.5%.
The LTC1261L includes an open-drain REG output that
pulls low when the output is within 5% of the set value. …