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LM3668 - High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter

General Description

The LM3668 is a synchornous buck or boost DC-DC converter optimized for powering low voltage circuits from a Li-Ion battery and input voltage rails between 2.5V and 5.5V.

It has the capability to support up to 1A output current over a output voltage range of 2.8V/3.3V.

Overview

www.DataSheet4U.com June 2007 LM3668 1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC Converter LM3668 1A, High Efficiency Dual Mode Single Inductor Buck-Boost DC/DC.

Key Features

  • 45µA typical quiescent current 1A maximum load current for VIN = 2.8V to 5.5V 800mA maximum load current for VIN = 2.7V 600mA maximum load current for VIN = 2.5V 2.2 MHz PWM fixed switching frequency (typ. ) Automatic PFM-PWM Mode or Forced PWM Mode Wide Input Voltage Range: 2.5V to 5.5V Output Voltage Range: 2.8V/3.3V Internal synchronous rectification for high efficiency Internal soft start: 600µs Maximum start-up tim.