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10pcs JacobsParts Mini360 3A DC Voltage Step Down Power Converter Buck Module 3.3V 5V 9V 12V

4.1 4.1 out of 5 stars 113 ratings
$8.99 $0.90 per Item
Mini360 Adjustable (10-Pack)
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Purchase options and add-ons

Brand JacobsParts
Power Source Battery Powered
Current Rating 3 Amps
Minimum Frequency 50 Hz
Item Weight 0.35 Ounces

About this item

  • Adjustable non-isolated DC buck voltage regulator, incredibly small module 17x11x3.8mm
  • Great for LED lights, micro-controllers, battery chargers, and most other low power devices.
  • Input: 4.75-23V, Output:1.0-17V, 3A Peak / 1.8A Sustained
  • Efficiency: Up to 96% (depends on the difference between input and output voltage) This module uses synchronous rectification, the most efficient power conversion available.
  • 340KHz switching frequency, <30mV ripple (no load), MP2307 IC

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Product details

  • Package Dimensions ‏ : ‎ 5 x 4.41 x 0.35 inches; 0.35 ounces
  • Item model number ‏ : ‎ DCMOD-H
  • Date First Available ‏ : ‎ November 29, 2017
  • Manufacturer ‏ : ‎ JacobsParts
  • ASIN ‏ : ‎ B078C7ZS74
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.1 4.1 out of 5 stars 113 ratings

WARNING:

CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

What's in the box

  • 10 buck modules

    • Looking for specific info?

    Customer reviews

    4.1 out of 5 stars
    4.1 out of 5
    113 global ratings

    Customers say

    Customers like the performance and value of the buck converter. They say it works well and is worth the purchase. However, some customers have reported issues with the heat and adjustment of the product. They mention that the output voltage is not adjustable and the potentiometer is sensitive. Customers also dislike noise. Opinions are mixed on quality.

    AI-generated from the text of customer reviews

    21 customers mention15 positive6 negative

    Customers like the performance of the transformer. They say it works well, has no issues, and produces no heat.

    "I've used these in many projects and they perform very well...." Read more

    "...With the LEDs pulling about 1A at 10V the driver seems to be working flawlessly and I even noticed that because its fully regulated the small..." Read more

    "...The ripple was now at 2.5Vpp (now at 160 KHz). Unacceptable junk. I will try to see how much cap is needed to make these work...." Read more

    "...Cons:I tried driving a digital LED strip, and while the module seems to work fine, it gets waay too hot...." Read more

    8 customers mention8 positive0 negative

    Customers find the transformer worth the purchase, and say it's a great board for the price. They also say it is a decent dc-dc converter.

    "...And they are inexpensive." Read more

    "...sure about running it continuously at 1.8A, but this is a great board for the price.... would (probably will) buy again...." Read more

    "...12V. Still a pretty decent dc-dc converter, assuming there isn't too much difference between input and..." Read more

    "...These buck converters work like a charm! Definitely worth the purchase!" Read more

    3 customers mention3 positive0 negative

    Customers are satisfied with the size of the transformer. They mention that it works well, is small, and can fit on a breadboard.

    "Crazy tiny which makes them extra easy to use...." Read more

    "Pros:Truly tiny, and seem to fit on a breadboard.Works for smaller currents.Cons:..." Read more

    "Good quality, small and work well. So far running for 4 straight days with .8 amp load." Read more

    9 customers mention6 positive3 negative

    Customers are mixed about the quality of the transformer. Some mention that the outputs appear rock solid, very reliable, and stable. However, others say that it fried immediately and gets too hot under no load.

    "...Their outputs appear rock solid on my multimeter and I've had zero problems so far...." Read more

    "...One fried instantly with a tiny zap when I accidentally plugged it in backwards." Read more

    "...This is the best. Stable, handles fluctuating load and fluctuating supply (supply is also driving the motors, so it varies a lot)...." Read more

    "Good quality board ans components...." Read more

    5 customers mention0 positive5 negative

    Customers are dissatisfied with the heat produced by the transformer. Some mention that it gets too hot.

    "...a digital LED strip, and while the module seems to work fine, it gets waay too hot...." Read more

    "Good quality board ans components. The inductor got a little warm at 1/2 amp (0.5 metric amps) so I'm not too sure about running it continuously at..." Read more

    "...Although they do get pretty hot taking in >12V. Still a pretty decent dc-dc converter, assuming there isn't too much difference between input and..." Read more

    "...but no. this thing actually warms up. then i measured the current it was using while not hooked up to anything: about 40mA !..." Read more

    4 customers mention0 positive4 negative

    Customers are dissatisfied with the adjustment of the transformer. They mention that the potentiometer for voltage adjustment can be really sensitive, and the adjustment won't allow for finite control. Some say that the knob is a little touchy to get it right where they want it.

    "...Just beware the potentiometer for voltage adjustment can be really sensitive." Read more

    "The voltage adjustment knob is a little touchy to get it right where you want it but it works great. No problems with it burning out or overheating." Read more

    "...so you need to find a spot that works but the adjustment wont allow for finite control. All 5 of mine had the same issue... Waste of 6 bucks...." Read more

    "...The few that did have output voltage were not adjustable. Total waste of money." Read more

    3 customers mention0 positive3 negative

    Customers are dissatisfied with the noise produced by the transformer.

    "...They also seem to have a small amount of high frequency noise, though this isn't an issue in most cases...." Read more

    "Noisy and not stable" Read more

    "Very noisy but small..." Read more

    Best 5V buck converter
    5 Stars
    Best 5V buck converter
    I've tried a bunch of 5V buck converters, to power the Raspberry Pi Zero 2W in the autonomous toy car I built. This is the best. Stable, handles fluctuating load and fluctuating supply (supply is also driving the motors, so it varies a lot). And they are inexpensive.
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    Top reviews from the United States

    F Volker
    5.0 out of 5 stars Great value
    Reviewed in the United States on March 8, 2024
    Style: MP1584 3.3V Fixed (5-Pack)Verified Purchase
    I've used these in many projects and they perform very well. They are advertised to work with input voltages from 4.5 to 28Vdc with a fixed output of 3.3V. Note that these are step down converters and to test the output voltage, there must be a load attached. With no load, the output will approach 4 Vdc when the input voltage is less than 5.2V or so.
    Helpful
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    Ari
    5.0 out of 5 stars Perfect for automotive lighting and general LED use
    Reviewed in the United States on February 13, 2018
    Style: Mini360 Adjustable (10-Pack)Verified Purchase
    Crazy tiny which makes them extra easy to use. I used a few to regulate voltage to interior LED lights I installed in my car so that they didn't pull direct ~13.5v since they were a bit too bright and got too hot. It is very nice to be able to just turn the potentiometer to set the lights to a desired output. With the LEDs pulling about 1A at 10V the driver seems to be working flawlessly and I even noticed that because its fully regulated the small fluctuations I noticed in the lights before have completely stopped.

    On a side note, there is absolutely no reverse polarity protection. One fried instantly with a tiny zap when I accidentally plugged it in backwards.
    6 people found this helpful
    Helpful
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    Zachary Gauthier
    4.0 out of 5 stars Almost Perfect
    Reviewed in the United States on November 10, 2023
    Style: Mini360 Adjustable (10-Pack)Verified Purchase
    I'm using these to replace the onboard regulator on ESP devkits, so I can run them at 3.5ish volts, and charge a lifepo4 battery. They're awesome. None of mine even get warm running ESP32s and ESP32-S3s with wifi etc. Their outputs appear rock solid on my multimeter and I've had zero problems so far. Just beware the potentiometer for voltage adjustment can be really sensitive.
    Helpful
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    GRACE
    3.0 out of 5 stars Great for low current, but overheats at 1.45A
    Reviewed in the United States on May 23, 2018
    Style: Mini360 Adjustable (10-Pack)Verified Purchase
    Pros:

    Truly tiny, and seem to fit on a breadboard.
    Works for smaller currents.

    Cons:
    I tried driving a digital LED strip, and while the module seems to work fine, it gets waay too hot. I can smell the heat after about 1 minute of continuous operation (At 5V, 1.45A). The other one that is driving an ESP32 and an audio player/amplifier module works great with no heat. The ESP/Audio setup is drawing anywhere from 10-30mA (I didn't test with Audio playing, though. Likely it would have similar results).
    They also seem to have a small amount of high frequency noise, though this isn't an issue in most cases.

    If you just need a tiny module to power something that draws low current, this is perfect. If you need more current, get something beefier.
    3 people found this helpful
    Helpful
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    GeooeG
    5.0 out of 5 stars Way easier to use than the adjustable voltage versions
    Reviewed in the United States on August 8, 2022
    Style: MP1584 3.3V Fixed (5-Pack)Verified Purchase
    I do a lot of sensor/microcontroller experiments and I had been using adjustable versions of this regulator. The adjustable ones can be challenging to tune to the right output voltage as small movements make big swings in output voltage. These are really plug and play for 3.3v projects. Way faster and no worry of bumping the pot and changing the voltage accidentally. Of the 5 or so that I have used so far, they all have put out between 2.9 and 3.2 volts when fed 12-13 volts from a solar charged battery. For my application, the variance is not an issue, but do I recommend testing each with a multimeter before using in a project to make sure it will meet your needs.
    One person found this helpful
    Helpful
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    Bob C.
    5.0 out of 5 stars Best 5V buck converter
    Reviewed in the United States on November 2, 2022
    Style: MP1584 5V Fixed (5-Pack)Verified Purchase
    I've tried a bunch of 5V buck converters, to power the Raspberry Pi Zero 2W in the autonomous toy car I built. This is the best. Stable, handles fluctuating load and fluctuating supply (supply is also driving the motors, so it varies a lot). And they are inexpensive.
    Customer image
    Bob C.
    5.0 out of 5 stars Best 5V buck converter
    Reviewed in the United States on November 2, 2022
    I've tried a bunch of 5V buck converters, to power the Raspberry Pi Zero 2W in the autonomous toy car I built. This is the best. Stable, handles fluctuating load and fluctuating supply (supply is also driving the motors, so it varies a lot). And they are inexpensive.
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
    2 people found this helpful
    Helpful
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    J. Dehn
    1.0 out of 5 stars Look with an oscilloscope! It is BAD.
    Reviewed in the United States on January 8, 2019
    Style: Mini360 Adjustable (10-Pack)Verified Purchase
    Bought the 10 pack of adjustable buck regulators for a LED lighting application. You get what you pay for in this case. These are so terrible! A quick test on my work bench proved just how bad...

    I tuned it for 5V(no load), 12V intput. At only 0.5A load these exhibit > 1.0Vpp ripple at 340 KHz! BAD! The regulation dropped to 4.4V average... So I turned it up to 5V. (was then 7V at no load)

    Things only get worse from there. At 2A, it started to cut out periodically. The thermal camera showed the chip as the hottest part, about 70C on the surface. The ripple was now at 2.5Vpp (now at 160 KHz). Unacceptable junk. I will try to see how much cap is needed to make these work.

    The efficiency is only marginally better than a linear regulator. Nowhere near 90%, much less than advertised. Cap will not help this.

    So, they got my money. I'm only out 6 USD.
    20 people found this helpful
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    George R. Blake
    5.0 out of 5 stars Great part. Exactly what I needed.
    Reviewed in the United States on January 28, 2023
    Style: MP1584 Adjustable (5-Pack)Verified Purchase
    This is a required part for a project board I am building. I installed it and it works great.
    Helpful
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