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Documents LM27761
SNVSA85C – OCTOBER 2015 – REVISED JANUARY 2017 LM27761 Low-Noise, Regulated, Switched-Capacitor Voltage Inverter
1 Features 3 Description The LM27761 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. Four low-cost capacitors are used in the
application solution to provide up to 250 mA of output
current. The regulated output for the device is
adjustable between -1.5 V and -5 V. The LM27761
operates at 2-MHz (typical) switching frequency to
reduce output resistance and voltage ripple. With an
operating current of only 370 ВµA (charge-pump power
efficiency greater than 80% with most loads) and 7ВµA typical shutdown current, the LM27761 provides
ideal performance when driving power amplifiers,
DAC bias rails, and other high-current, low-noise
voltage applications. 1 Inverts and Regulates the Input Supply Voltage
Low Output Ripple
Shutdown Lowers Quiescent Current to 7 ВµA …
