LT1616

PRODUCTION

600mA, 1.4MHz Step-Down Switching Regulator in SOT-23

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Overview

  • Wide Input Range: 3.6V to 25V
  • 5V at 400mA from 7V to 25V Input
  • 3.3V at 400mA from 4.7V to 25V Input
  • Fixed Frequency 1.4MHz Operation
  • Uses Tiny Capacitors and Inductors
  • Internally Compensated
  • Low Shutdown Current: <1µA
  • Low VCESAT Switch: 220mV at 300mA
  • Tiny 6-Lead SOT-23 Package

The LT1616 is a current mode PWM step-down DC/DC converter with internal 0.6A power switch, packaged in a tiny 6-lead SOT-23. The wide input range of 3.6V to 25V makes the LT1616 suitable for regulating a wide variety of power sources, from 4-cell batteries and 5V logic rails to unregulated wall transformers and lead-acid batteries. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors. With its internal compensation eliminating additional components, a complete 400mA step-down regulator fits onto 0.15 square inches of PC board area.

The constant frequency current mode PWM architecture and stable operation with ceramic capacitors results in low, predictable output ripple. Current limiting provides protection against shorted outputs. The low current (<1µA) shutdown provides complete output disconnect, enabling easy power management in battery-powered systems.

Applications

  • Wall Transformer Regulation
  • Local Logic Supply Conversion:
    • 12V to 5V
    • 12V or 5V to 3.3V, 2.5V or 1.8V
  • Battery-Powered Equipment
  • Distributed Supply Regulation
  • Digital Cameras
LT1616
600mA, 1.4MHz Step-Down Switching Regulator in SOT-23
3.3V Step-Down Converter Efficiency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
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LTC2960
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LTC2974
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Protection Switches & Controllers 1
LT4363
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Switching Regulators & Controllers 1
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT1616
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