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Small green rectangular PCB breakout board with surface-mount components and pin headers

Adafruit

Adafruit TLV62569 3.3V Buck Converter Breakout 1.2A engineering development tool

SKU CH-DMYF-W4WFN

A 3.3V buck converter breakout delivering up to 1.2A continuous current from inputs up to 5.5V with 90-95% efficiency

  • Product typePrototyping Products
  • Delivers 3.3 V from 3.4–5.5 V input
  • Supplies 1.2 A continuous current for portable projects
  • Pin-compatible with LM1117-3.3V TO-220 for easy upgrades
  • Runs at 1.5 MHz fixed frequency for compact design
  • Thermal shutdown protects against overheating

Adafruit TLV62569 3.3V Buck Converter Breakout

The Adafruit TLV62569 breakout is a step-down switching regulator that delivers a fixed 3.3V output at up to 1.2A continuous current from an input range of 3.4V to 5.5V. It achieves 90-95% efficiency and runs at a 1.5-MHz fixed frequency. The board measures 15.2mm x 10.0mm x 2.9mm and includes thermal shutdown protection. It suits engineers and hobbyists prototyping portable 3.3V circuits powered by LiPoly batteries, triple alkaline cells or USB sources.

Pin-compatible LM1117-3.3V TO-220 replacement checks

Verify that your existing design uses the LM1117-3.3V in a TO-220 footprint, as this breakout is pin compatible with that specific linear regulator package. Confirm your input voltage stays within the 3.4V to 5.5V window; the converter will not regulate below 3.4V. Ensure the load does not exceed 1.2A continuous current, although short spikes up to 2A are possible. The enable pin must be driven high for normal operation or pulled low to shut down the output completely.

Thermals noise and power draw in normal use

The TLV62569 chip integrates thermal shutdown to protect the device during overload or high ambient temperature conditions. High 90-95% efficiency means minimal heat is generated compared to linear regulators, reducing the need for external heatsinking in typical 1.2A applications. Switching at 1.5-MHz allows the use of a small onboard inductor, keeping the profile low at 2.9mm height. No fan or active cooling is required for normal operation within the rated current and voltage limits.

How it compares

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Price $7.99
Cheaper than about 68% of the 170 comparable items (median $11.49).

Specifications

Product
Product typePrototyping Products

Questions about this item

Does the breakout board include pin headers or must they be purchased separately?

The board ships without pin headers; they must be purchased and soldered by the user.

Which version should I choose between the fixed 3.3V output and an adjustable alternative?

This breakout provides a fixed 3.3V output; no adjustable version is offered for this model.

What does the 1.2A rating mean when powering a 3.3V microcontroller from a LiPoly battery?

It delivers up to 1.2A continuously from 3.4V to 5.5V input, covering LiPoly, 3 alkalines or USB, with 90-95% efficiency and thermal shutdown protection.

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