LM27761

Product Folder Order Now Technical Documents Tools & Software Support & Community LM27761 SNVSA85C – OCTOBER 2015 – REVISED JANUARY 2017 LM27761 Low-Noise, Regulated, Switched-Capacitor Voltage Inverter 1 Features 1 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-Ω Inverter Output Impedance, VIN = 5 V ±4% Regulation at Peak Load 370-µA Quiescent Current 2-MHz (Typical) Low-Noise Fixed-Frequency Operation 35-dB (Typical) LDO PSRR at 2 MHz With 80-mA Load Current 30-mV LDO Dropout Voltage at 100 mA, VOUT = –5 V Current Limit and Thermal Protection Create a Custom Design Using the LM27761 With the WEBENCH® Power Designer 2 Applications Operational Amplifier Power Wireless Communication Systems Cellular-Phone Power-Amplifier Biasing Interface Power Supplies Handheld Instrumentation Hi-Fi Headphone Amplifiers Powering Data Converters 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 µA (charg...