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LT3973 Datasheet Step-down Regulator

Manufacturer: Linear Technology (now Analog Devices)

General 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.

A high efficiency switch is included on the die along with the catch diode, boost diode, and the necessary oscillator, control and logic circuitry.

Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 10mV in a typical application.

Key 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.

More Datasheets from Linear Technology (now Analog Devices)

Part Number Description
LT3973-3.3 Step-Down Regulator
LT3973-5 Step-Down Regulator
LT3971-3.3 2MHz Step-Down Regulator
LT3971-5 2MHz Step-Down Regulator
LT3971A Step-Down Regulator
LT3971A-5 Step-Down Regulator
LT3922 2A Synchronous Step-Up LED Driver
LT3952 60V LED Driver
LT3955 LED Converter
LT3959 Wide Input Voltage Range Boost/SEPIC/Inverting Converter

LT3973 Distributor