Fractal 5V Boostyboi High Efficiency Voltage Booster


Our custom-made, high-efficiency 5V booster to extend your VTX voltage range on 1S builds

2 in stock

Categories: , , SKU: ELEC-5V-BOOSTYBOI


Radically extend your flight time and improve your video reliability on 1S Li-ion builds with this 5V voltage booster

One of the major challenges with digital or longer-range 1S builds is supplying enough voltage to the video transmitter, along the whole discharge curve of the battery.

In most cases, Li-po batteries can be discharged down to 3.5 or even 3.3v.

That is already edging the limit of the HDZero Whoop Lite VTX (which tends to completely brownout below 2.8V and will not restart unless power-cycled)

But even more so on Li-ion builds whose batteries can be discharged down to 2.5v – All while showing higher voltage sag under load, which can turn off your video under the slightest punchout past mid-battery capacity


That is why I use a voltage booster on my digital and discrete analog VTX Wingman BNF builds.


I’ve tested quite a mouthful of modules of various sizes and specs, and thought I had found the best one at a time,

But it had it’s quirks and when I started noticing the quality going down over the batches I thought it was time to make my own.


I then went on to select the best-suited power IC for our specific 1S need and found this outstanding chip, boasting impressive specs, on a very recent design from 2022

Then designed the circuit around it from the most reputable component manufacturers,

And out came this remarkably capable piece of gear that I can definitely trust to supply consistent, reliable power all the way through our 1S batteries.


Why do you need one:

  • It will power your HDZero Whoop lite or Walksnail VTX all the way down to 2.5V and below, even at full output power.
  • Small package and light weight of only 1.3g; fits most whoop builds and I’ve made it to fit perfectly between the wingman rear standoffs.
  • Built from top quality components from reputable manufacturers (Kemet, Samsung, TDK…) with high reliability in mind; rigorously tested to the limits.

It is in my experience a vital element in building a reliable 18650 1S build, whether be it with a digital or a high-power analog VTX


Entirely removing the video brownout bottleneck and enabling you to experience flights upwards of 20 minutes on a digital Wingman!




  • Module Properties:  non-isolated step-up module (BOOST)
  • Input voltage:  1.8-5V
  • Output voltage:  5V
  • Output Current:  Rated 2.1A
  • Conversion efficiency:  up to 96%
  • Switching Frequency:  500KHz
  • Output ripple:  40mV (Max)  20M Bandwidth ( Input 3.6V, Output 5V 1A)
  • Operating temperature: Industrial grade (-40 Celsius to +85  Celsius )
  • Quiescent Current: 90uA
  • Load regulation:  ± 1.5%
  • Voltage regulation:  ± 3%
  • Short circuit protection: Output only
  • Input Reverse Polarity Protection: None
  • Output over-voltage protection



1x Voltage Booster Module

Additional information

Electronic module

Fractal 5V Boostyboi


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