The LTC1261CS8#PBF is a switched-capacitor charge-pump Regulated Voltage Inverter designed to provide a regulated negative voltage from a single positive supply. It operates from a single 3 to 8V supply and provides an adjustable output voltage from -1.25 to -8V. An on-chip resistor string allows the LTC1261CS to be configured for output voltages of -3.5/-4/-4.5/-5V with no external components. The LTC1261CS8 is optimized for applications which use a 5V or higher supply or which require low output voltages. The LTC1261CS requires one or two external 0.1µF capacitors, depending on input voltage. It requires additional external input and output bypass capacitors. An optional compensation capacitor at ADJ/COMP can be used to reduce the output voltage ripple. It will supply up to 12mA output current with guaranteed output regulation of 5%. The LTC1261 includes an open-drain REG output which pulls low when the output is within 5% of the set value. Output ripple is typically as low as 5mV.
Regulated negative voltage from a single positive supply
