LM27761DSGT Description

The LM27761DSGT low-noise regulated switched-capacitor voltage inverter delivers a very low-noise adjustable output for an input voltage in the range of 2.7 V to 5.5 V. The low-cost capacitor LM27761DSGT is used in the application solution to provide up to 250 mA of output current. The regulated output for LM27761DSGT is adjustable between -1.5 V and -5 V. The LM27761DSGT operates at a 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 370 μA (charge-pump power efficiency greater than 80% with most loads) and a 7-μA typical shutdown current, the LM27761DSGT provides ideal performance when driving power amplifiers, DAC bias rails, and other high-current, low-noise voltage applications.

LM27761DSGT Features

• Inverts and Regulates the Input Supply Voltage

• Low Output Ripple

• Shutdown Lowers Quiescent Current to 7 μA(Typical)

• Up to 250-mA Output Current

• 2.5-? Inverter Output Impedance, VIN= 5 V

• ±4% Regulation at Peak Load

• 370-μA Quiescent Current

LM27761DSGT Applications

• Operational Amplifier Power

• Wireless Communication Systems 

• Cellular-Phone Power-Amplifier Biasing

• Interface Power Supplies

• Handheld Instrumentation

• Hi-Fi Headphone Amplifiers

• Powering Data Converters