LT3493-3

PRODUCTION

1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN

Data Sheet Product Selection Table
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Overview

  • Wide Input Range: 6.8V to 36V Operating, 40V Maximum
  • 1.2A Output Current
  • Fixed Frequency Operation: 750kHz
  • Output Adjustable Down to 780mV
  • Short-Circuit Robust
  • Uses Tiny Capacitors and Inductors
  • Soft-Start
  • Internally Compensated
  • Low Shutdown Current: <2µA
  • Low VCESAT Switch: 330mV at 1A
  • Thermally Enhanced, Low Profile 2mm × 3mm DFN-6 Package

The LT3493-3 is a current mode PWM step-down DC/DC converter with an internal 1.75A power switch. The wide operating input range of 6.8V to 36V (40V maximum) makes the LT3493-3 ideal for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.

Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The low current (<2µA) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems.

VIN Range
LT3493 3.6V to 36V Operating, 40V Maximum
LT3493-3 6.8V to 36V Operating, 40V Maximum

Applications

  • Automotive Battery Regulation
  • Industrial Control Supplies
  • Wall Transformer Regulation
  • Distributed Supply Regulation
  • Battery-Powered Equipment
LT3493-3
1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN
3.3V Step-Down Converter Efficiency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Power System Management (PSM) & Sequencers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Protection Switches & Controllers 2
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LT3493
  • LT3493-3
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.

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