LTC1517-3.3

PRODUCTION

Micropower, Regulated 3.3V Charge Pump in a 5-Pin SOT-23 Package

Data Sheet Product Selection Table
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Overview

  • Ultralow Power: Icc = 6µA Typ
  • Short-Circuit/Thermal Protected
  • 3.3V ±4% Regulated Output
  • VIN Range: 2V to 4.4V
  • Output Current:
    • 8mA (VIN ≥ 2V)
    • 15mA (VIN ≥ 2.5V)
  • No Inductors
  • Ultrasmall Application Circuit (0.045in2)
  • 700kHz Switching Frequency
  • Available in 5-Pin SOT-23

The LTC1517-3.3 is a micropower charge pump DC/DC converter that produces a regulated 3.3V output. The input voltage range is 2V to 4.4V, allowing a single cell lithium battery to produce a regulated 3.3V output over the entire life of the battery. Extremely low operating current (typically 6µA with no load) and low external parts count (one 0.1µF flying capacitor and two small bypass capacitors at VIN and VOUT) make the part ideally suited for small, light load battery-powered applications. The total printed circuit board area of the application circuit shown below is only 0.045in2.

The part operates as a Burst Mode™ switched-capacitor voltage doubler to produce a regulated output. The part has thermal shutdown capability and can survive a continuous short circuit from VOUT to GND. The device is available in a 5-pin SOT-23 package.

Applications

  • Cellular Telephones
  • Battery-Operated Equipment
  • Local Power Supplies
  • Handheld Instruments
  • PCMCIA Supplies
LTC1517-3.3
Micropower, Regulated 3.3V Charge Pump in a 5-Pin SOT-23 Package
Typical Output Voltage vs Output Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

Data Sheet

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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC1517-3.3
  • LTC1517-5
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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