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Your cart is empty. Features:
- DC to DC step-down module
- Thickened circuit boards
- Advanced solid-state capacitor
- Short circuit and over-temperature protection
- 100% tested, sealed in anti-static packaging
Kindly Note:
1. Input voltage must be 1.5 V higher than the output voltage, no boost
2. Do not reverse the input and output interface
3. Keep output under 2.5A (or 10W) and use a heat sink when for a long time working
4. The factory settings stay a high voltage, you may need to contrarotate the screw on blue potentiometer about 7-15 circles before the output voltage changes
Specifications:
- Type: DC-DC buck converter
- Input voltage: DC 3.2V - 35V
- Output Voltage: DC 1.25V - 30V (adjustable)
- Output Current: 3A (max.)
- Output Power: 15W (max.)
- Conversion Efficiency: 92% (max.)
- Switching Frequency : 65KHz
- Rectification: non-synchronous rectification
- Module property: non-isolated buck module
- Operating Temperature: -45℃ to +85℃
- Load Regulation: ± 0.5%
- Voltage Regulation: ± 2.5%
- Size(L x W x H): 45*23*14mm / 1.77*0.91*0.55inch
- Weight: 14g
Package List:
10x DC to DC Buck Converter Module
Bob
Reviewed in the United States on February 26, 2025
At first, all of the units I ordered seemed to output just barely less than the input voltage. I turned the adjustment screw left and right, but the output didn't change.What I discovered is that if this happens, turn the adjustment screw counter clockwise until you see the output voltage change. It takes a good bit of turning, but when you reach this spot in the settings, you have very good control over the output voltage.So don't send them back right away. Try unscrewing the adjustment screw until the controller kicks in.
Nikola
Reviewed in Canada on January 2, 2025
I used this converter to drop the voltage from a USB charger to power the string lights. It successfully dropped the voltage from 5v to 3v. It took 13 full counterclockwise turns on a screw to drop to 3v where the first 12 turns made no change. The lights are pulling 0.3 amp and the IC is running cool.
Darrell G.
Reviewed in the United States on April 10, 2025
The output voltage is always the same as the input. You can't adjust it even with turning the POT.
Timo Spingat
Reviewed in Canada on May 8, 2024
The 10 units arrived inside of a box, sealed individually inside anti-electrostatic packaging.I hooked up each individual buck regulator and it's a 10/10 for me as far as getting working units goes. The potentiometer needs a solid 5 or 6 turns counter-clockwise for the voltage to come down, but I got all of them down to 5v from a 12v source. Did some quick load-testing by connecting power resistors to see if the voltage would drop, it did not. Unfortunately I don't have a scope handy so I can't comment on the output noise. I think as a simple power supply for home crafts and DIY projects these will suffice just fine.Build quality is perfectly reasonable, if anything I wish the through-holes were a bit bigger as well as the soldering pads, but it's still workable if one doesn't try to connect a 14G wire.
RealDeal_Rc
Reviewed in the United States on March 30, 2024
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Customer
Reviewed in Canada on February 23, 2024
I built a Max97220 headphone amplifier/line driver/preamplifier and to prevent it ever being destroyed by overpowering the 5 volts DC limit, I used this power supply regulator. I blew up the first one with reverse polarity so I added two 1N4004 diodes to the front to prevent reverse polarity destruction. The diodes drop a few millivolts but better safe than sorry. Works like a charm. The resistor in the photo was just a dummy load for test and setup but I ended up leaving a 10k ohm resistor in parallel with the MAX97220 supply VCC to maintain an idle current of 0.5mA on the 2596 board. It also has an LED in series with a 1k ohm resistor drawing another 3mA. The 1N4004s turned the LM2596/Max97220 combination into a radio receiver so I connected the audio ground on the negative terminal of the LM2596 PCB and it ran 100% perfect and silent.Great little board!
Jose M. Arechiga
Reviewed in the United States on December 30, 2024
LOVED THE PRODUCT WILL REORDER IF NEEDED
kirk m wilson
Reviewed in the United States on October 19, 2024
These are good to have on hand for hobby electronics or project builds. Versatile.
Andrew Terranova
Reviewed in the United States on March 21, 2023
So far, so good. I bought a six pack of these voltage regulators. The first one I hooked up I messed up and reversed the input voltage. This immediately smoked the regulator; so beware that there is no reverse voltage protection on the input. This was completely my mistake, and not an issue with the product.I hooked the second voltage regulator up to my test setup, and it worked great. I used a 32VDC power supply salvaged from an old HP printer as the input supply. I tested the output with a high power 2kohm resistor. I was able to adjust the output voltage to a steady 12.00 volts according to my digital multimeter. The input voltage remained approximately the same as before I connected the output load.Then I switched the load to a small DC motor with a gear train attached. The voltage output remained very stable at +/- 0.01 volts from the 12.00 volts I had set with the resister test.Overall I'd say these are inexpensive and very nice little voltage regulators, and a good value for the money. I intend to add a little voltage meter and build a little benchtop power supply with this one.
T. Knight
Reviewed in the United States on January 2, 2023
Did what they were supposed to do, but they do have to be adjusted with a load attached. I wasn't able to fine tune the voltage until after I put a load on it, but after that I found it easy to adjust. Though it took a lot of turns until I saw a change.Just use a bench power supply set right above your target voltage and adjust the buck converter down until you see the output voltage drop, then raise your bench supply to your target input voltage and readjust for your target output voltage. These do automatically handle changes in input voltage while maintaining a stable output voltage.Used approx 11mA @ 12v input w/ no output load.Tested with a 0.5 steady, 2A periodically spiked load and maintains a stable voltage without getting too hot to touch. I did install thermal tape connecting it to the chassis for extended operation.
Drew P.
Reviewed in the United States on July 27, 2022
I purchased this 10-pack of Valefod 10 Pack DC to DC High Efficiency Voltage Regulator 3.0-40V to 1.5-35V Buck Converter to use in converting emergency light / exit signs to use low voltage DC. The converters do what they are supposed to, largely.They are easy to use - power in, power out - not much more to it than that. They are compact. Voltage stays where you set it and doesn't drift (except when overloaded, of course). With 12 V input well regulated, output voltage stayed fairly constant from no load to a 500 mA test load - within 40 mV of the 5.4 V output to which I had set it.One drawback, and as mentioned by others, is a relatively high defect rate, that is, in my very limited sample of just 10 pieces. One of 10 was defective - the output voltage stayed same as the input voltage no matter the setting of the buck module's adjustment pot. A moment's inspection revealed that one pin of the LM2596 switching regulator chip was bent and touching an adjacent pin, creating a solder bridge. In less time than it took to write this review, I warmed the soldering iron and fixed it.Efficiency of these buckers (Valefod) isn't quite as high as I would have expected. At 12 V in and 5.4 V out, with 200 mA load, I measured 125 mA at the input for an efficiency of about 72% - the buck module was slightly warm to the touch. Perhaps the effciency would be better at greater load. However, it still easily beats an LM317 or other linear regulator.Regarding RFI generation by these Valefod buck modules, there are essentially no measures incorporated in the module's design to suppress same. There is just an electrolytic on the input and another on the output. However, with 2 of these buckers running, fed by 12 V through about 200 ft. of twisted bell wire, and each in turn feeding its 200 mA load through about 2 ft. of same twisted bell wire, interference was inaudible. This was checked using an on-premises HF radio transceiver on the 80, 60, and 40 meter bands and with a crummy end-fed antenna which invariably gets noise from being inevitably coupled to the AC power lines via power line ground. If I put a finger on one of the bucker's input leads or output leads, then RFI became audible but not strong. If your application demands low RFI and your setup is not at least somewhat balanced with respect to ground as was mine, then you may need to add some bypass caps and series chokes.
Andrew Stegner
Reviewed in Australia on July 16, 2022
I originally bought these for a home solar project as I needed to convert 6V to 3.3V. I then used another from 12V to 5V conversion. Then I used another to fix a charging problem in another device. There working well so far and I am chuffed that I am using them up and they are not languishing in a storage box.Is this a "Right place Right time" purchase or a product that fits well, at a good price, nice delivery and my gadgets are working. Yay!
John Burns
Reviewed in Australia on December 14, 2021
Great product - works well.
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