LT3473
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LT3473

Micropower 1A Boost Converter with Schottky and Output Disconnect

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $2.66
Features
  • Tiny Solution Size
  • Low Quiescent Current:
    • 150µA in Active Mode (VIN = 3.6V, VOUT = 15V, No Load)
    • 1µA in Shutdown Mode
  • Internal 1A, 36V Switch
  • Integrated Schottky Diode
  • Integrated PNP Output Disconnect
  • Internal Reference Override Pin
  • PGOOD Pin
  • 25V at 80mA from 3.6V Input
  • Auxiliary NPNs for Intermediate Bias Voltages (LT3473A)
  • Automatic Burst Mode® Operation at Light Load
  • Constant Switching Frequency: 1.2MHz
  • Thermal Shutdown
  • Input Range: 2.2V to 16V
  • Low Profile (3mm × 3mm) DFN Package (LT3473)
  • Low Profile (4mm × 3mm) DFN Package (LT3473A)
Additional Details
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The LT3473/LT3473A are micropower step-up DC/DC converters with integrated Schottky diode and output disconnect circuitry in low profile DFN packages. The small package size, high level of integration and the use of tiny SMT components yield a solution size of less than 50mm2. The internal 1A switch allows the device to deliver 25V at up to 80mA from a Li-Ion cell, while automatic Burst Mode operation maintains efficiency at light load. An auxiliary reference input (CTRL) allows the user to override the internal 1.25V feedback reference with any lower value, allowing full control of the output voltage during operation. A PGOOD pin sinks current when the output voltage reaches 90% of final value.

The LT3473A includes two NPN transistors for generating intermediate bias voltages from the output and is offered in a 12-lead (4mm × 3mm) DFN package. The LT3473 does not include these NPNs and is offered in an 8-lead (3mm × 3mm) package.

The rugged 36V switch and output disconnect circuitry allow outputs up to 34V to be easily generated in a simple boost topology.

Applications

  • OLED Bias
  • CCD Bias
Part Models 4
1ku List Price Starting From $2.66

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3473AEDE#PBF
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LT3473AEDE#TRPBF
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LT3473EDD#PBF
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LT3473EDD#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC883A

LT3473EDD | Li-Ion to 25V Step-Up DC/DC Converter, 3V to 4.2VIN, 25VOUT @ 80mA

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DC883A

LT3473EDD | Li-Ion to 25V Step-Up DC/DC Converter, 3V to 4.2VIN, 25VOUT @ 80mA

LT3473EDD | Li-Ion to 25V Step-Up DC/DC Converter, 3V to 4.2VIN, 25VOUT @ 80mA

Product Detail

Demonstration circuit DC883 features the LT3473 micropower step-up DC/DC converters with integrated Schottky diode and output disconnect circuitry. The output on DC883 is 25V at up to 80mA from a 3~4.2V input, while automatic Burst Mode operation maintains efficiency at light load. The lithium ion battery input voltage range, high output voltage, internal NPN power switch, minimal external components and simple design make the LT3473 an excellent solution for OLED and CCD Bias.

Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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