LM27761DSGR Description

For an input voltage ranging from 2.7 V to 5.5 V, the LM27761DSGR low-noise regulated switched-capacitor voltage inverter provides an extremely low-noise adjustable output. The application solution uses four low-cost capacitors to deliver up to 250 mA of output current. The device's controlled output can be adjusted between 1.5 and 5 volts. To reduce output resistance and voltage ripple, the LM27761DSGR operates at a 2-MHz (typical) switching frequency. The LM27761DSGR provides optimal performance when driving power amplifiers, DAC bias rails, and other high-current, low-noise voltage applications, with an operating current of only 370 A (charge-pump power efficiency better than 80% with most loads) and a typical shutdown current of 7 A.

LM27761DSGR Features

? The Input Supply Voltage is inverted and regulated.

? Low Ripple Output

? Quiescent Current Drops to 7 A After Shutdown (Typical)

? Output Current of up to 250 mA

? VIN = 5 V, 2.5-inverter output impedance

? At peak load, there is a 4% regulation.

? Quiescent Current of 370 A

LM27761DSGR Applications

? Power of the Operational Amplifier

? Systems for Wireless Communication

? Biasing of cellular phone power amplifiers

? Power Supplies for Interfaces

? Instrumentation for use on the go

? Amplifiers for Hi-Fi Headphones

? Providing power to data converters