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RioRand DC/DC 3.5-30V to 4.0-30V Booster Converter Step Up Voltage Regulator LM2587

by RioRand
4.3 out of 5 stars 36 customer reviews
| 20 answered questions
Price: $8.73 Free Shipping for Prime Members | Fast, FREE Shipping with Amazon Prime
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Frequently Bought Together

  • RioRand DC/DC 3.5-30V to 4.0-30V Booster Converter Step Up Voltage Regulator LM2587
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  • SUNKEE LM2577 DC-DC Adjustable Step-up Power Converter Module
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  • DROK Micro LED DC-DC Digital Boost Voltage Converter LM2577 3-34V to 4-35V 5V/12V 2.5A Step-up Adjustable Volt Regulator Board Module Power Supply Transformer
Total price: $25.14
Buy the selected items together

Technical Details

  • Panel LED Display

Product Description

DC/DC 3.5-30V to 4.0-30V
Booster Converter Step Up Voltage Regulator LM2587 Volume: length (3.8) * W (5.2) * (2.0) (CM) Weight 32G
Item: LLL-DY-01
Note: If the output voltage is not higher than the input voltage, please adjust potentiometer clockwise, the output voltage will rise, please do not counterclockwise adjustment when you test the module in the case of high input voltage will be damaged or even damaged!
Indicators: Input voltage range: 3.5V-30V (output set voltage higher than the input voltage must be guaranteed)
Output voltage range: 4.0V-30V
Input maximum current: 5A (based on power conservation under nominal conditions the output current Uin * Iin * efficiency = Uout * Iout)
Continuous operating current: 3A (good ventilation conditions, the output voltage and input voltage ratio can not be greater than 3)

Product Information

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Customer Reviews

Top Customer Reviews

4.0 out of 5 starsDoes waht is is supposed to
By Auton on December 21, 2013
Verified Purchase
I bought this for a hobby project and it fit my needs exactly. I seems capable of delivering the advertised step up and current without difficulty. I used to in conjunction with the circuit board from a failed Battery Tender junior (failed transformer). With this set up I am able to charge my 12v starting battery from my 12 deep cycle battery. With the charger drawing just over an amp at 18v, the boost convereter was drawing about 2.1 amps, about 80% efficient. Efficiency seems to fall of as the load does, so when the charger dropped down to trickle mode the boost converter was still drawing almost 1.8 amps.

The only reason I didn't give this five stars is that it came with no documentation at all. The information I needed was in the Amazon item description, but it would have been nice to have a copy included with the item as well. Here are the vital facts to using this:

1 Input voltage MUST be lower than the output voltage. So if you have a 12v input, you need to set the output to at least 12.5v
2 Output voltage cannot be more than 3 times the input voltage. So if your input is 12v, do not set the output greater than 36v
3 Turn the potentiometer (the brass screw head on the blue box) clockwise to increase output voltage, counter-clockwise to decrease.
4 Max continuous operating current must not exceed 3 amps, description is not clear on this, so I am operating under the assumption this is Input current.

Hints to get this unit set up safely.

1 use a lower input voltage than you plan to for the final installation. For example if you intend to run a 12v input, use a 5v input to adjust the output voltage, this will reduce the risk of setting the output less than the input.

2 use a 5 amp fuse inline with this module input to protect against over current.
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5.0 out of 5 starsA good and reliable product
By Luiz Camargo Da Silva on December 2, 2012
Verified Purchase
Works perfectly; I use it from 12Vdc to 24Vdc, for months I already have used many, no one failed ever.
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5.0 out of 5 starsWorks great
By 2close2call on March 11, 2014
Verified Purchase
No issues, this does exactly what it says, I took a 5 volt solar panel up to 12 volts to charge a car battery.
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5.0 out of 5 starsGreat converter, highly sensitive
By Clubbby on September 24, 2013
Verified Purchase
This does as advertised. Very sturdy too. Well secured parts, thick board.

The trim pot (for mine anyway) was set at the high end of the spectrum. I generally use this for a 5V output and it was set to put out the 30V by default. The trim pot is VERY sensitive. It took me a couple of minutes to turn it enough to get it down to my desired voltage. This isn't a bad thing, it means the voltage can be set very precisely. Just a hassle initially is all.
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3.0 out of 5 starsFragile unit
By MH. on June 27, 2013
Verified Purchase
This is a fragile unit. I can say that "please do not counterclockwise adjustment when you test the module in the case of high input voltage will be damaged or even damaged!" is very true.

Thing is - what constitutes high input voltage? They don't say. 5 or 6? Popped. What's a low enough input voltage, that will still properly energize the unit, to then set the output voltage? So that you can then switch to your desired input voltage (without destroying the unit) ? They don't say. From other reviewers say - they didn't pop theirs. But maybe they're used to "walking up" these fragile chinese units?

All I can say is this is pretty fragile as well as under-specified wrt proper setup procedures.

Before you ding me on this as "they told you so" consider the exact work flow I went through on my lab bench.
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4.0 out of 5 starsGiven my abbreviated verification testing was rudimentary at best; the results showed the converters work
By T. RANEY on June 14, 2015
Verified Purchase
DC/DC Boost Converter with LM2587S Voltage Regulator. Input: 3.5V to 30V. Output: 4.0V to 30V.

I want to thank all who contributed their insights on the DC/DC Boost Converter with LM2587S Regulator. Since the converters did not have their own instructions, the experiences of others were very valuable to me. So, I decided to do my own tests for a future thermoelectric generator application. Given my abbreviated verification testing was rudimentary at best; the results showed the converters work.

Note. The LM2587 is rated for 5A, but that's a maximum rating for a particular application. Other components in this converter impose limits: the SS34 diode has a 3A rating and 40V [repetitive] peak inverse voltage max. The capacitors are limited to 35V max. Please keep these limits in mind.

So, the purpose of this exercise was to test and compile instructions for the DC/DC boost converter. Test instrumentation and other equipment included a regulated DC power supply, a fuse assembly, digital multimeter and the requisite test leads.

The procedures included first placing a 2 ampere (A) fuse in series with the negative input lead from a regulated DC power supply and setting its potential to 5-volts (V). Initially, I tried to adjust the converter while connected to a 100 load resistor as others suggested. This closed circuit method did not work for me. Thus, all adjustments were done “open circuit”.

I then turned the converter’s potentiometer (blue trim pot) counterclockwise (CCW) with it connected to the 5V supply and adjusted the converter’s output to 18V.

The 18V output remained stable even with a 3V input potential. With a 3V input, the converter’s input current fluctuated from 0.01 to 0.02A, but the 18V output was essentially stable.Read more ›
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5.0 out of 5 starsGreat boost converter.
By Jose C on September 14, 2014
Verified Purchase
I am very impressed with this product. I was using this thing to raise the voltage from 12V to 20V, and I have to say, no matter what voltage I put between 12V and 18V, the voltage stayed at 20V and it wouldn't fluctuate by more than .2V at most. I'm only using about 1-2amps at most. I wouldn't know how this would work with higher current applications since I didn't test it beyond that. That being said, I did notice the unit wouldn't get hot at all, so, it could definitely handle more than what I was using it for.
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Most Recent Customer Reviews

5.0 out of 5 starsWorks as described, no issues. Ran a few ...

Works as described, no issues. Ran a few different items including LED light and audio amp board. Didn't get hot, but probably only running a amp or 2 draw on it.

Published 4 months ago by J Walker
4.0 out of 5 starsWorks well

A neat little booster, just make sure the input voltage is less than the set output voltage. I fried the first one I had and for me, I had to replace D1 on the board to fix it.

Published 14 months ago by Sean S
5.0 out of 5 starsGood value

Worked well for my application.

Published 16 months ago by M John. Ellis
5.0 out of 5 starsGreat little converter

Great value. Works great.

Published 16 months ago by Jorda G Levy
3.0 out of 5 starsGets SUPER HOT at 3 amps

The unit works, for the most part. The black chip gets EXTREMELY hot when you feed it 3 amps @ 12v, boosting to 15v. Read more

Published 17 months ago by Jonathan
5.0 out of 5 starsGreat DC/DC power adapter for POE injectors

I have purchased a few of these in the past. I use them to power my Ubiquity wifi radios using a POE injector and a 12v battery system. Works great. Read more

Published 18 months ago by G. Petrivelli
5.0 out of 5 starsGreat little gadget for projects

Disclosure of Material Connection: I received this product for free so that I could provide product feedback to the company and post a product review. Read more

Published 18 months ago by Victor
5.0 out of 5 starsEasy to use, and does it exactly what it's supposed to.

I'm using this to drive LEDs off a couple of AA batteries, and so far it's working great. The low input voltage of 3. Read more

Published 21 months ago by W.D. Mclain
5.0 out of 5 starsFive Stars

good as I expected.

Published 21 months ago by Mnf
3.0 out of 5 starsEasy to set up and I was hopeful but could ...

Worked but not under load. If your load is very low then it should work but for my application this was not the case and I sent it back. Read more

Published 23 months ago by Merv

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