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LT3991-5 - 1.2A Step-Down Regulator

Download the LT3991-5 datasheet PDF (LT3991 included). The manufacturer datasheet provides complete specifications, pinout details, electrical characteristics, and typical applications for 1.2a step-down regulator.

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

Note: The manufacturer provides a single datasheet file (LT3991_LinearTechnology.pdf) that lists specifications for multiple related part numbers.

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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.
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