LT3431

PRODUCTION

High Voltage, 3A, 500kHz Step-Down Switching Regulator

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $6.57
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Part Details

  • Wide Input Range: 5.5V to 60V
  • 3A Peak Switch Current
  • Small Thermally Enhanced 16-Pin TSSOP Package
  • Constant 500kHz Switching Frequency
  • Saturating Switch Design: 0.1Ω
  • Peak Switch Current Maintained Over Full Duty Cycle Range
  • Effective Supply Current: 2.5mA
  • Shutdown Current: 30µA
  • 1.2V Feedback Reference Voltage
  • Easily Synchronizable
  • Cycle-by-Cycle Current Limiting
LT3431
High Voltage, 3A, 500kHz Step-Down Switching Regulator
5V, 2A Buck Converter Efficiency vs Load Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

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Surge Stopper, Overvoltage, and Overcurrent Protection 1
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3431
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC549A

LT3431EFE Demo Board | 60V Transients, 7.5V ≤ VIN ≤ 20V, VOUT = 5V @ 2A

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Product Details

Demonstration circuit 549 is a monolithic step-down DC/DC switching converter using the LT3431. The board is optimized for 5V output at up to 2A load current for a steady state input voltage range of 7.5V to 20V. The LT3431 is capable of withstanding input transients to 60V and runs at 500kHz with steady state input voltages that require duty cycles between 25% and 75%.
DC549A
LT3431EFE Demo Board | 60V Transients, 7.5V ≤ VIN ≤ 20V, VOUT = 5V @ 2A
DC549A - Schematic

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