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LM2771 - Step-Down DC/DC Converter

General Description

The LM2771 is a switched capacitor step-down regulator that produces a 1.5V output without the use of an inductor.

It is capable of supplying loads up to 250mA.

The LM2771 operates with an input voltage from 2.7V to 5.5V, and requires only 3 low-cost ceramic capacitors.

Key Features

  • 1.
  • 2 Low-Noise Fixed Frequency Operation.
  • 1.5V Output Voltage.
  • Li-Ion (3.6V) to 1.5V with 81% Efficiency.
  • 1.7% Output Voltage Accuracy.
  • Very Low Output Ripple: 8mV @ 250mA.
  • Output Currents up to 250mA.
  • 2.7V to 5.5V Input Range.
  • Shutdown Disconnects Load from VIN.
  • 1.1MHz Switching Frequency.
  • No Inductors…Small Solution Size.
  • Current Limit and Thermal Protection.
  • WSON-10 Package (3mm × 3mm ×.

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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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LM2771 www.ti.com SNVS435A – MARCH 2006 – REVISED MAY 2013 LM2771 Low-Ripple 250mA Switched Capacitor Step-Down DC/DC Converter Check for Samples: LM2771 FEATURES 1 •2 Low-Noise Fixed Frequency Operation • 1.5V Output Voltage • Li-Ion (3.6V) to 1.5V with 81% Efficiency • 1.7% Output Voltage Accuracy • Very Low Output Ripple: 8mV @ 250mA • Output Currents up to 250mA • 2.7V to 5.5V Input Range • Shutdown Disconnects Load from VIN • 1.1MHz Switching Frequency • No Inductors…Small Solution Size • Current Limit and Thermal Protection • WSON-10 Package (3mm × 3mm × 0.8mm) APPLICATIONS • DSP, Memory, and Microprocessor Power Supplies • Mobile Phones and Pagers • Portable Electronic Devices DESCRIPTION The LM2771 is a switched capacitor step-down regulator that produces a 1.