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DROK Buck Converter 12v to 5v, 5A USB Voltage Regulator DC 9V-36V Step Down to DC 5V-5.3V 5.2V 3.5-6A Volt Transformer Power Supply Module for Phone Fast Charging
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Learn more
Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
Bundles with this item
Purchase options and add-ons
Brand | DROK |
Color | Black Pro |
Connectivity Technology | USB |
Compatible Devices | Power Tools |
Item Weight | 22 Grams |
About this item
- DROK buck converter input voltage is DC 9v-36v, output voltage is 5.2V (5V-5.3V available according to your input voltage).
- The step down regulator adopts synchronous rectification scheme to provide wide voltage range, large current and high efficiency.
- Our buck voltage regulator is user-friendly, accompany with DC interface and connecting terminals, make it easier to be connected to different devices.
- The voltage reducer is with USB interface and quick charge identifying chip, and is compatible with Android and Apple.
- Note: Input different voltage will output different power: input DC 9-24V, output 5.2V/6A/30W; input DC 24-32V, output 5.2V/5A/25W; input DC 32-36V, output 5.2V/3.5A/18W.
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From the brand

Enjoy Life, Enjoy DIY.
DROK
- An expert in this field for over 10 years.
- A seller who cares you a lot.
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Power Converter
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How did we get our start?
DROK has been an expert in this field since 2010. Originally, two of our engineers would like to make our own products and sell to everyone. With love and enthusiasm, DROK was established.
Why do we love what we do?
We cares you a lot. We believe that a good product can bring happiness to our customer. Your satisfaction is our strength.
How do we do, if there's some issue with product?
We care you a lot. Each product you purchase from DROK can share one-year long period service. You can get a brand new replacement if there's any quality issue with your items.
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Product Description

Integrity, Quality, Innovation, Customer----DROK
DROK has been engaged in technical research, development, manufacture and sale of all kinds of buck converters for many years.
With acquisition of leading technology, we strictly enforce quality management system and improve operational management, dedicate to produce high performance voltage step down transformers for our valued customers.


Reverse Connection Protection Diode
Much safer to use the converter module with the protection.
DC Plug
There are connection terminals and a DC plug, which is very easy to use the voltage converter.
Different Input for Different Output
Input DC 9-24V, output 5.2V/6A/30W;
Input DC 24-32V, output 5.2V/5A/25W;
Input DC 32-36V, output 5.2V/3.5A/18W.
USB Output DC 5.0V/5A
With a USB port and fast charging identification chip which is compatible with Android and iPhone.
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Customer Reviews |
4.5 out of 5 stars 719
|
4.3 out of 5 stars 2,083
|
4.1 out of 5 stars 102
|
4.3 out of 5 stars 1,640
|
4.5 out of 5 stars 719
|
4.3 out of 5 stars 2,083
|
Price | $9.99$9.99 | $14.99$14.99 | — no data | $16.99$16.99 | $12.99$12.99 | $16.99$16.99 |
Input Voltage | DC 9-36V | DC 6-32V | DC 5-23V | DC 6.5-36V | DC 6-32V | DC 6-30V |
Output Voltage | 5-5.3V | DC 1.5-32V | DC 0.01-18V | DC 1.2-32V | DC 3-12V | DC 7-32V |
Max Current | 3.5A/5A/6A | 5A | 3A | 4.5A | 5V/3.4A; 9V/2.5A; 12V/2A, etc. | 5A |
CC/CV mode | no data | ✓ | no data | ✓ | no data | ✓ |
Display | no data | LCD | LCD | LCD | no data | LCD |
Case | no data | ✓ | ✓ | ✓ | no data | ✓ |
USB Output | ✓ | ✓ | no data | no data | ✓ | no data |
Compare with similar items
This Item ![]() DROK Buck Converter 12v to 5v, 5A USB Voltage Regulator DC 9V-36V Step Down to DC 5V-5.3V 5.2V 3.5-6A Volt Transformer Power Supply Module for Phone Fast Charging | Recommendations | |||||
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | $9.99$9.99 | $8.99$8.99 | $26.99$26.99 | $14.99$14.99 | -17% $17.49$17.49 List: $20.99 | $12.89$12.89 |
Delivery | Get it as soon as Thursday, Apr 17 | Get it as soon as Thursday, Apr 17 | Get it as soon as Thursday, Apr 17 | Get it as soon as Thursday, Apr 17 | Get it as soon as Thursday, Apr 17 | Get it as soon as Thursday, Apr 17 |
Customer Ratings | ||||||
Sold By | DROK | Aceirmc US | Meizhou | DROK | DROK | Valefod-direct |
power source | Corded Electric | Dc Power Supply | Dc Power Supply | Battery Powered | Battery Powered | Battery Powered |
current rating | 5.0 amps, 6.0 amps | 5.0 amps, 6.0 amps | 20 amps | 2.0 amps, 3.0 amps | 12 amps | 3.0 amps, 2.5 amps |
mounting type | — | No Mount | — | — | Panel Mount | PCB Mount |
model number | 200217 | 16528 | 20-90V to 12V20A 5L | 180040 5x | REES-1822 | VA-139-52 |
Videos
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DROK 5v USB Buck ConverterDROK
Product information
Customer Package Type | Standard Packaging |
---|---|
Unit Count | 1.0 Count |
Style | Black/1pcs |
Manufacturer | DROK |
Package Dimensions | 3.78 x 2.28 x 0.98 inches |
Item Weight | 0.776 ounces |
ASIN | B01NALDSJ0 |
Item model number | 200217 |
Customer Reviews |
4.5 out of 5 stars |
Best Sellers Rank | #49,656 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #172 in Power Converters |
Is Discontinued By Manufacturer | No |
Date First Available | December 21, 2016 |
Country of Origin | China |
Warranty & Support
Feedback

DROK Buck Converter 12v to 5v, 5A USB Voltage Regulator DC 9V-36V Step Down to DC 5V-5.3V 5.2V 3.5-6A Volt Transformer Power Supply Module for Phone Fast Charging
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the buck converter works well, delivering steady high power and being constructed solidly. The device is easy to solder and connect, and customers appreciate its fast-charging capabilities. The power source aspect receives mixed feedback - while some say it's perfect for Raspberry Pi, others report no power at all. The heat level also gets mixed reviews, with some noting it doesn't get too hot while others mention it can get warm.
AI-generated from the text of customer reviews
Customers find that the transformer works well, particularly for Raspberry Pi applications and as a charger.
"...Works perfectly. I bought 4 as a set. Now, I have 2 left over." Read more
"...Works like a charm. I really didn't want more than a single power cord to my pedalboard, and this converter makes that possible...." Read more
"These buck converters work well and are very versatile." Read more
"...Overall, I love it. It's tiny, efficient, and works well with my Raspberry pi's in waterproof boxes, powered by 12V LiFePo's." Read more
Customers praise the transformer's power output, noting its steady high performance and rock-solid voltage delivery. One customer mentions it can provide up to 3A of power.
"...this little converter that will take various voltages and convert them to the needed 5V, so I purchased one, hoping for the best...." Read more
"...Overall, I love it. It's tiny, efficient, and works well with my Raspberry pi's in waterproof boxes, powered by 12V LiFePo's." Read more
"Amperage is ok, running small wireless cameras from this 5V output, from a 12V 8AH battery. Lasts for days...." Read more
"...I am very impressed by it. It definitely needs a good power supply. For sure. as you see in one of my photos. only time will tell." Read more
Customers praise the build quality of the buck converter, noting its solid construction and high-quality components, with one customer specifically mentioning its well-designed circuitry.
"...recommend to anyone needing USB-level power from other DC voltages in a neat, convenient package." Read more
"...that already had a 12v power supply and this has been rock solid for years...." Read more
"...Lasts for days. Much better conversion rate than a 7805. Not even comparable. So far this unit has performed...." Read more
"This module seems to be well designed and they squeezed in two sizable filter capacitors, one for the applied power source and a second for the USB..." Read more
Customers find the transformer easy to install and solder, with quick installation time, and one customer mentions it simplifies the wire run.
"...That worked and install time was very quick with this method...." Read more
"I really like how easy this is! I needed to lower my solar power voltage from 12v to 5v for the raspberry pi and this does an amazing job!..." Read more
"...Easy, found that it fits inside a prescription pill container. I used the barrel connector for the input voltage." Read more
"...To simplify the wire run, I got a 3A 12v supply, and split it off at the spotlight to power the USB camera...." Read more
Customers appreciate the transformer's fast charging capabilities, with one customer noting it performs better than a 7805 converter.
"...Lasts for days. Much better conversion rate than a 7805. Not even comparable. So far this unit has performed...." Read more
"...a QC3 device (I only seem to have one unfortunately) the charging voltage is increased...." Read more
"Quick Charge works as expected (12V input and 9V@1.5A output using my cellphone)" Read more
"...Very quickly. It could definitely charge my earpiece very quickly. I am very impressed by it. It definitely needs a good power supply. For sure...." Read more
Customers praise the voltage converter's performance, with one mentioning its critical components and another highlighting its 12v to 5v functionality.
"...These are critical components of a DC-DC converter, to prevent output overshoot at startup and maintain better regulation through load current..." Read more
"...Seriously folk. It’s a DC to DC converter! How are you supposed to review THAT? It works, the price is cool. Not a bother. Want a moan?..." Read more
"...fans in the size I needed were out of stock so this buck converter came in real handy, plus it was less expensive than the fan would’ve been...." Read more
"Very cool converter to run USB devices hardwired...." Read more
Customers have mixed experiences with the power source: some find it perfect for Raspberry Pi, while others report receiving no power at all.
"Nice little efficient step-down module! It draws about 2ma in idle, so you can't ever just leave it connected to a battery when not in use...." Read more
"...Also the ideal solution for powering a Pi from an automotive DC source." Read more
"...of 12v-5v buck convertors to power a Raspberry Pi, but they provide inadequate power...." Read more
"...It is flawlessly powering a traffic camera in my car while wired to a 12 volt circuit in the windshield mirror so that no wires hang down towards..." Read more
Customers have mixed opinions about the transformer's heat level, with some noting it runs cool while others mention it can get a little warm.
"...It also only ever got slightly warm, never hot. It does however lack holes to screw it to anything...." Read more
"...I wanted to see how warm they would get. The converter module does get warm, but not too hot to handle...unlike another similar product that got..." Read more
"...Unit can get a little warm but not hot to the touch, even under a constant 2A load. I have not tested higher amperage than that." Read more
"...These things get Really Hot when you are pushing them up there. I mean, so Hot you wouldn't be able to keep your finger on the chip!..." Read more
Reviews with images

It Works GREAT With a Battery Made of 2, 3.65v LiFEPO4 Prismatic Cells
Top reviews from the United States
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- Reviewed in the United States on April 3, 2025Style: Black Mini/4pcsVerified PurchaseI’m into electronics and need a 5v supply to mod a Bose Wave Radio. The minus supply and output rails are common and is exactly what I needed for my project. I removed the usb connector and soldered the wires to the usb output in order to miniaturize the board. Works perfectly. I bought 4 as a set. Now, I have 2 left over.
- Reviewed in the United States on August 10, 2020Style: Black/1pcsVerified PurchaseI am a working musician and was putting together an effects pedalboard, when I noticed my wireless unit (Line 6 G10) actually runs off 5VDC through a USB cord instead of the more typical 9VDC barrel plug. After a brief search I discovered this little converter that will take various voltages and convert them to the needed 5V, so I purchased one, hoping for the best.
I wired it into my pedalboard power supply, fired it up, and tested the voltage as a precaution - 5VDC and some change - exactly as described. I tested it with the wireless unit and it worked perfectly.
The *only* drawback I can see to this product is that there is really no easy way to mount it - I didn't see any sort of project box sized for it. I modified an empty Altoids tin, Velcroing this adapter in place inside with plastic surrounding it to prevent contact between the board and the tin. I then Velcroed the tin to the bottom frame of my pedalboard.
Works like a charm.
I really didn't want more than a single power cord to my pedalboard, and this converter makes that possible. Highly recommend to anyone needing USB-level power from other DC voltages in a neat, convenient package.
- Reviewed in the United States on February 24, 2025Style: Blue/2pcsVerified PurchaseThese buck converters work well and are very versatile.
- Reviewed in the United States on September 2, 2020Style: Black Mini/4pcsVerified PurchaseNice little efficient step-down module! It draws about 2ma in idle, so you can't ever just leave it connected to a battery when not in use. Add a switch. It might draw less if you smash the tiny blue LED to bits :p
The solder terminals are also a wee bit small, maybe 22AWG or smaller wire only. I carefully tack-soldered 18AWG, which was way overkill obviously, but it's what I had to use to get a prototype in the field that day. You can do it if you are good with the iron.
There are no mounting holes, so if you need to mount this, you have to use foam tape or some rubber band solution, lol. I want to shrink wrap mine, but then I can't see the tiny blue LED anymore :( Just remember, stock, you need to be careful not to short the input wires when handling it with the power on.
Overall, I love it. It's tiny, efficient, and works well with my Raspberry pi's in waterproof boxes, powered by 12V LiFePo's.
- Reviewed in the United States on November 4, 2024Style: Black/1pcsVerified PurchaseNeeded to power a Raspberry Pi 4 and 5 in some project enclosures that already had a 12v power supply and this has been rock solid for years. The Pi 5 is very "hungry" for power (5 amps) and if you power from a common 12v/24v power supply you will get 5+ amps from this converter without an issue. Also the ideal solution for powering a Pi from an automotive DC source.
- Reviewed in the United States on August 12, 2022Style: Black Mini/4pcsVerified PurchaseAlmost 1 & 1/2 years ago, I ordered a 10 pack of 3.2v, 50ah, Prismatic Lifepo4 cells from an online vendor. With 8 of those cells I built a 100 amp hour LiFEPO4 battery. But I had 2, 3.2v, 50ah cells remaining that I did not know what to do with.
I started wondering if there was a USB module that would accept an input of a minimum of 6 volts to which I could connect the battery to charge and power USB devices. Then I discovered the DROK USB DC-DC Step Down Buck Converter capable of taking 6 volts minimum and converting it to a 5V QC 3.0 Charging Module. I read the reviews, good and bad...bad to see what people were complaining about, and decided to buy a set of 4.
I figured that the converter module should work as a USB charging device when connected to the 2 remaining LiFEPO4 cells if the cells are wired in series to produce the required 6+ volts. (See the first picture of the 2 LiFEPO4 cells connected in series with one of the 2 connections coming from the converter module connected.)
The second photo shows both wires connected, and the blue illuminated LED on the converter module. You can see "78% 10 m until full" on the screen of my phone. The third photo shows the charging symbol on the screen. It shows 79%. Sorry for the fuzziness of that picture.
I used a few of the converter modules to charge my phone and tablet for quite a while over the last few days. I wanted to see how warm they would get. The converter module does get warm, but not too hot to handle...unlike another similar product that got far too hot to be safe. And that was only at about 1 amp of current output. I'll be submitting a brutally honest review on that one soon.
I foresee finding an appropriate container in which I will cut holes for the 4 converter modules and the the 50 amp hour battery and use the power source for a portable mega-USB charging station. I'll upload pictures when I get around to making it.
I am very happy that my idea panned out!
5.0 out of 5 starsAlmost 1 & 1/2 years ago, I ordered a 10 pack of 3.2v, 50ah, Prismatic Lifepo4 cells from an online vendor. With 8 of those cells I built a 100 amp hour LiFEPO4 battery. But I had 2, 3.2v, 50ah cells remaining that I did not know what to do with.It Works GREAT With a Battery Made of 2, 3.65v LiFEPO4 Prismatic Cells
Reviewed in the United States on August 12, 2022
I started wondering if there was a USB module that would accept an input of a minimum of 6 volts to which I could connect the battery to charge and power USB devices. Then I discovered the DROK USB DC-DC Step Down Buck Converter capable of taking 6 volts minimum and converting it to a 5V QC 3.0 Charging Module. I read the reviews, good and bad...bad to see what people were complaining about, and decided to buy a set of 4.
I figured that the converter module should work as a USB charging device when connected to the 2 remaining LiFEPO4 cells if the cells are wired in series to produce the required 6+ volts. (See the first picture of the 2 LiFEPO4 cells connected in series with one of the 2 connections coming from the converter module connected.)
The second photo shows both wires connected, and the blue illuminated LED on the converter module. You can see "78% 10 m until full" on the screen of my phone. The third photo shows the charging symbol on the screen. It shows 79%. Sorry for the fuzziness of that picture.
I used a few of the converter modules to charge my phone and tablet for quite a while over the last few days. I wanted to see how warm they would get. The converter module does get warm, but not too hot to handle...unlike another similar product that got far too hot to be safe. And that was only at about 1 amp of current output. I'll be submitting a brutally honest review on that one soon.
I foresee finding an appropriate container in which I will cut holes for the 4 converter modules and the the 50 amp hour battery and use the power source for a portable mega-USB charging station. I'll upload pictures when I get around to making it.
I am very happy that my idea panned out!
Images in this review
- Reviewed in the United States on March 2, 2023Style: Black/1pcsVerified PurchaseAmperage is ok, running small wireless cameras from this 5V output, from a 12V 8AH battery. Lasts for days. Much better conversion rate than a 7805. Not even comparable.
So far this unit has performed. Had a bad camera that made it look as though the buck converter was failing. It was not. It was the esp32-cam card, it eventually fried.
- Reviewed in the United States on January 30, 2025Style: Black Mini/4pcsVerified PurchaseNo ability to say input wasn't enough for QC3.... Fed the part 32V at 5amps max on my supply...
Max voltage it can receive. Same results at 24V....
It's a 5V regulator, that's all. It is no longer a QC3 device with high ratings.
Part has changed to a cheaper part.
SCAM SCAM SCAM. I could get the same for half the cost. Lasered part numbers so you cannot proof the design... Straight up 5 Volt 1.2 Amp 10 year old Junk being sold as QC 3.0. Swapped device to ride a different device... 10 of 11 images show a different part! Now add mine!
1.0 out of 5 starsNo ability to say input wasn't enough for QC3.... Fed the part 32V at 5amps max on my supply...Not what it used to be. 5V 1.2A maximum!!!
Reviewed in the United States on January 30, 2025
Max voltage it can receive. Same results at 24V....
It's a 5V regulator, that's all. It is no longer a QC3 device with high ratings.
Part has changed to a cheaper part.
SCAM SCAM SCAM. I could get the same for half the cost. Lasered part numbers so you cannot proof the design... Straight up 5 Volt 1.2 Amp 10 year old Junk being sold as QC 3.0. Swapped device to ride a different device... 10 of 11 images show a different part! Now add mine!
Images in this review
Top reviews from other countries
- Alberta-HamReviewed in Canada on December 14, 2023
5.0 out of 5 stars Awsome QC 3.0 board for projects.
Style: Black Mini/4pcsVerified PurchaseI removed the USB connector as I wanted to direct-wire a USB cable to the board. I would be nice to have a solder-pad output option rather than only the USB port.
- Wes M.Reviewed in Canada on November 5, 2021
5.0 out of 5 stars Work great!
Style: Black Mini/4pcsVerified PurchaseProduct looks as sold. Each unit has performed well. Recommend!
-
LucReviewed in Canada on February 21, 2021
5.0 out of 5 stars Bon achat
Style: Black Mini/4pcsVerified PurchaseFonctionne tel qu'espéré.
- Jinyi LeangReviewed in Canada on July 15, 2020
5.0 out of 5 stars good item
Style: Black Mini/4pcsVerified PurchaseExcellent product
- Amazon CustomerReviewed in Canada on December 10, 2022
2.0 out of 5 stars Does the bare minimum
Style: Black Mini/4pcsVerified PurchaseWill fast charge when initially plugged in, but overheats and drops to 3 watt charging in about 30 seconds...
Tested multiple boards from the pack on multiple devices (phone, gps, etc)