Datasheet Linear Technology LTC1261CS8-4#PBF

LTC1261
Switched Capacitor
Regulated Voltage Inverter
FEATURES DESCRIPTION Regulated Negative Voltage from a Single Positive Supply
n Can Provide Regulated –5V from a 3V Supply
n REG Pin Indicates Output is in Regulatio Low Output Ripple: 5mV Typ
n Supply Current: 600ВµA Typ
n Shutdown Mode Drops Supply Current to 5ВµA
n Up to 15mA Output Current
n Adjustable or Fixed Output Voltages
n Requires Only Three or Four External Capacitors
n Available in SO-8 Packages The LTCВ®1261 is a switched-capacitor voltage inverter
designed to provide a regulated negative voltage from
a single positive supply. The LTC1261CS operates from
a single 3V to 8V supply and provides an adjustable
output voltage from –1.25V to –8V. An on-chip resistor
string allows the LTC1261CS to be configured for output
voltages of –3.5V, –4V, –4.5V or –5V with no external
components. The LTC1261CS8 is optimized for applications which use a 5V or higher supply or which require
low output voltages. It requires a single external 0.1ВµF
capacitor and provides adjustable and fixed output voltage
options in 8-lead SO packages. The LTC1261CS requires
one or two external 0.1ВµF capacitors, depending on input …