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LM2773 - Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator

General Description

The LM2773 is a switched capacitor step-down regulator that produces a selectable 1.8V or 1.6V output.

It is capable of supplying loads up to 300mA.

The LM2773 operates with an input voltage from 2.5V to 5.5V, accommodating 1-cell Li-Ion batteries and chargers.

Key Features

  • Low-Noise Spread Spectrum Operation 1.8V/1.6V Selectable Output Voltage 2% Output Voltage Regulation > 75% Efficiency in 1.8V Mode Very Low Output Ripple: 10mV @ 300mA Output Currents up to 300mA 2.5V to 5.5V Input Voltage Range Shutdown Disconnects Load from VIN 1.15MHz Switching Frequency No Inductors…Small Solution Size Short Circuit and Thermal Protection 0.5mm pitch, µSMD-9 (1.511 × 1.511mm × 0.6mm).

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator January 22, 2008 LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator General Description The LM2773 is a switched capacitor step-down regulator that produces a selectable 1.8V or 1.6V output. It is capable of supplying loads up to 300mA. The LM2773 operates with an input voltage from 2.5V to 5.5V, accommodating 1-cell Li-Ion batteries and chargers. The LM2773 utilizes a regulated charge pump with gains of 2/3x and 1x. It has very low ripple and noise on both the input and output due to its pre-regulated 1.15MHz (typ.) switching frequency and spread spectrum operation.