Datasheet4U Logo Datasheet4U.com

LT3991-3.3 - 1.2A Step-Down Regulator

This page provides the datasheet information for the LT3991-3.3, a member of the LT3991 1.2A Step-Down Regulator family.

Description

The LT®3991 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 55V.

Low quiescent current design consumes only 2.8µA of supply current while regulating with no load.

Features

  • n Ultralow Quiescent Current: 2.8µA IQ Regulating 12VIN to 3.3VOUT n Fixed Output Voltages: 3.3V, 5V 2.1µA IQ Regulating 12VIN n Low Ripple Burst Mode® Operation: Output Ripple < 15mVP-P n Wide Input Voltage Range: 4.3V to 55V n 1.2A Maximum Output Current n Adjustable Switching Frequency: 200kHz to 2MHz n Synchronizable Between 250kHz to 2MHz n Fast Transient Response n Accurate 1V Enable Pin Threshold n Low Shutdown Current: IQ = 700nA n Power Good Flag n Soft-Start CapabilityV n.

📥 Download Datasheet

Datasheet preview – LT3991-3.3

📁 Similar Datasheet

  • LT3991 - 1.2A Step-Down Regulator (Linear Technology)
  • LT3990 - 350mA Step-Down Regulator (Linear Technology)
  • LT3990 - 350mA Step-Down Regulator (Analog Devices)
  • LT3990-3.3 - 350mA Step-Down Regulator (Analog Devices)
  • LT3990-5 - 350mA Step-Down Regulator (Analog Devices)
  • LT3905 - Boost DC/DC Converter (Linear Technology)
  • LT390AW - Ceramic Filter (LGE)
  • LT3932 - 2A Synchronous Step-Down LED Driver (Linear Technology)
  • LT3932-1 - 2A Synchronous Step-Down LED Driver (Analog Devices)
  • LT3950 - 1.5A LED Driver (Analog Devices)
Other Datasheets by Linear
  • LT3991-5 - 1.2A Step-Down Regulator
  • LT3990-3.3 - 350mA Step-Down Regulator
  • LT3990-5 - 350mA Step-Down Regulator
  • LT3999 - 1MHz Push-Pull DC/DC Driver
  • LT3922 - 2A Synchronous Step-Up LED Driver
  • LT3952 - 60V LED Driver
  • LT3955 - LED Converter
  • LT3959 - Wide Input Voltage Range Boost/SEPIC/Inverting Converter

Full PDF Text Transcription

Click to expand full text
Features n Ultralow Quiescent Current: 2.8µA IQ Regulating 12VIN to 3.3VOUT n Fixed Output Voltages: 3.3V, 5V 2.1µA IQ Regulating 12VIN n Low Ripple Burst Mode® Operation: Output Ripple < 15mVP-P n Wide Input Voltage Range: 4.3V to 55V n 1.2A Maximum Output Current n Adjustable Switching Frequency: 200kHz to 2MHz n Synchronizable Between 250kHz to 2MHz n Fast Transient Response n Accurate 1V Enable Pin Threshold n Low Shutdown Current: IQ = 700nA n Power Good Flag n Soft-Start CapabilityV n Internal Compensation n Saturating Switch Design: 0.44Ω On-Resistance n Output Voltage: 1.
Published: |