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LT3973-3.3 - Step-Down Regulator

This page provides the datasheet information for the LT3973-3.3, a member of the LT3973 Step-Down Regulator family.

Description

The LT®3973 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 42V, and consumes only 2.5µA of quiescent current.

Features

  • nn Ultralow Quiescent Current nn 2.5µA IQ at 12VIN to 3.3VOUT nn Low Ripple Burst Mode® Operation nn Output Ripple < 10mVP-P nn Wide Input Voltage Range: 4.2V to 42V Operating nn Adjustable Switching Frequency: 200kHz to 2.2MHz nn Integrated Boost and Catch Diodes nn 750mA Output Current nn Excellent Start-Up and Dropout Performance nn Fixed Output Voltages: 3.3V, 5V nn 1.9µA IQ at 12VIN nn Accurate Programmable Undervoltage Lockout nn Low Shutdown Current: IQ = 0.75µA nn Internal Catch Diode Cu.

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Full PDF Text Transcription

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FEATURES nn Ultralow Quiescent Current nn 2.5µA IQ at 12VIN to 3.3VOUT nn Low Ripple Burst Mode® Operation nn Output Ripple < 10mVP-P nn Wide Input Voltage Range: 4.2V to 42V Operating nn Adjustable Switching Frequency: 200kHz to 2.2MHz nn Integrated Boost and Catch Diodes nn 750mA Output Current nn Excellent Start-Up and Dropout Performance nn Fixed Output Voltages: 3.3V, 5V nn 1.9µA IQ at 12VIN nn Accurate Programmable Undervoltage Lockout nn Low Shutdown Current: IQ = 0.75µA nn Internal Catch Diode Current Limit nn Power Good Flag nn Thermal Shutdown nn Small, Thermally Enhanced 10-Lead MSOP and (3mm × 3mm) DFN Packages APPLICATIONS nn Automotive Battery Regulation nn Power for Portable Products nn Industrial Supplies nn Gate Drive Bias LT3973/LT3973-3.
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