--- product_id: 5699607 title: "RioRandLM2596 DC-DC Buck Converter Step Down Module Power Supply Output 1.23V-30V (5Pcs-LM2596)" brand: "riorand" price: "$26.70" currency: USD in_stock: true reviews_count: 8 url: https://www.desertcart.us/products/5699607-riorandlm2596-dc-dc-buck-converter-step-down-module-power-supply store_origin: US region: United States of America --- # 3A max output Compact 45x20x14mm Adjustable 1.5V-35V RioRandLM2596 DC-DC Buck Converter Step Down Module Power Supply Output 1.23V-30V (5Pcs-LM2596) **Brand:** riorand **Price:** $26.70 **Availability:** ✅ In Stock ## Summary > 🔋 Power Your Passion with Precision! ## Quick Answers - **What is this?** RioRandLM2596 DC-DC Buck Converter Step Down Module Power Supply Output 1.23V-30V (5Pcs-LM2596) by riorand - **How much does it cost?** $26.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/5699607-riorandlm2596-dc-dc-buck-converter-step-down-module-power-supply) ## Best For - riorand enthusiasts ## Why This Product - Trusted riorand brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Design:** Space-saving dimensions fit seamlessly into any setup. - • **Solid Reliability:** Built with SANYO capacitors for long-lasting performance. - • **Power Up Your Projects:** Transform your voltage with precision and ease! - • **High-Quality Components:** Thickened circuit boards and high-Q inductance for superior output. - • **Efficiency Meets Versatility:** Achieve up to 3A output for all your power needs. ## Overview The RioRand LM2596 DC-DC Buck Converter is a high-efficiency power supply module designed for versatile applications. With an input range of DC 3V to 40V and an adjustable output from 1.5V to 35V, it delivers a maximum output current of 3A. Constructed with premium SANYO solid capacitors and a robust circuit board, this compact module is perfect for DIY projects and professional applications alike. ## Description RioRandLM2596 DC-DC Buck Converter Step Down Module Power Supply Output 1.23V-30V (5Pcs-LM2596) ## Features - Input: DC 3V to 40V (input voltage must be higher than the output voltage to 1.5v above can not boost) - Output: DC 1.5V to 35V voltage continuously adjustable, high-efficiency maximum output current of 3A. - Features: All SANYO solid capacitors, the 36u thickening circuit boards, high-Q inductance with output value of high-power LED indicator - Dimensions: 45 (L) * 20 (W) * 14 (H) mm (with potentiometer) ## Product Details - **Brand:** RioRand - **Power Source:** Dc Powered - **Current Rating:** 3 Amps - **UPC:** 619636102448 - **Manufacturer:** RioRand ## Images ![RioRandLM2596 DC-DC Buck Converter Step Down Module Power Supply Output 1.23V-30V (5Pcs-LM2596) - Image 1](https://m.media-amazon.com/images/I/41oDKWEa9RL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best Bang For Your Buck (Converter) *by J***I on September 14, 2016* Rarely do I give a product 5 stars but this item is the exception. What struck me right from the start was the professional packaging for each board. They were individually sealed in an anti-static bag. I've gotten electronics (LASERS, 365 nm UV LEDs, etc) that have either been shipped in a plain plastic baggie or just in a shipping envelope. Then there is the price. Less than $2 per piece! I had originally intended to build an adjustable regulator based on the LM2576-adj; however, this board is exactly what I need for a lab supply I am building and will also go into a solar cell battery charger.As to the devices performance under load I modified one unit by replacing the output cap with a 1000 uF 35v cap and also used Arctic Alumina thermally conductive epoxy to glue a Cosmos copper RAM heatsink to both of them both available via Amazon. (see attached pic) One word of caution - Arctic Alumina gels after 3 minutes and is rock hard after 5 so work quickly bearing in mind that once the epoxy sets the heatsink isn't going to come off without destruction. I hooked the unmodified device up to my scope and attached a homemade dynamic load to the output terminals. The open circuit voltage was set to 12.6v. With a 1 ma load there were 3 usec pulses impressed on the DC output @ 56 KHz. Pk-pk amplitude was 64 mv. @ 1.5 amps the pk-pk amplitude rose to 134 mv with a 6.4 usec pulse width. The one with the 1000 uf cap at 1 ma had a pulse width of 2.8 usec and a pk-pk amplitude of 16 mv. At 1.5 amps the pulse width widened to 7.8 usec with a pk-pk amplitude of 33 mv. A vast improvement over the unmodded version. Both versions lost regulation at about 1.75 amps which I attribute to the time constant of the DC supply I am using. (18 v pk-pk fullwave rectified into a 4700 uf cap) I had noticed that while my load got significantly hot the regulator was only a couple of degrees above ambient so adding the heatsink might be overkill. Since I am building a lab supply and want the output as clean as possible I will mod the other board and use a low pass filter on the output of each board. Caveat: NatSemi's data sheet doesn't recommend going over 820 uf for the output cap. I believe it's because too large a cap might inhibit starting as it looks like a very low impedance at power up. I didn't notice any problems.I am extremely satisfied with the boards performance and would recommend it to anyone looking for a cheap reliable regulator board. However, depending on the application, one may not need to mod the board. Bear in mind that the negative lead of the output cap is soldered to the ground plane and is difficult to clear of solder. I've got years of soldering skills both with thru hole and surface mount devices and clearing the ground hole took a little bit of effort. I would also recommend, if you decide to use Arctic Alumina thermal epoxy, that you download the MSDS and application instructions from their web site.Update 30 Oct: 16: I modified two modules changing the output cap to 1000 uF and removing the trim pot so I could use a panel mounted pot to control the output. Since the pot was located about 4 inches from the board I used shielded RG218 mini-coax to connect the board to the pot minimizing stray fields from influencing the units stability. I wanted the power switch on the front panel but was concerned about running the hot side of the line past the regulators. That issue was avoided by twisting the wires and dressing them close to the chassis and then covered them with conductive copper tape to further shield the wires. Below are two views of the finished power supply. The front panel turned out real well and internally the layout is neatly done. Most of the parts can be obtained from Amazon. The panel meters are Hopesun 15 volt D'Arsonval movement analog meters. I used them because they don't require a power supply and, if I need precision, I can use my DVM. The unit cost me about $60 to build as compared to over $200 bucks for a decent lab supply of similar performance. All parts are new. I originally wanted a multi-turn pot to control the voltage but a 10 turn pot would have set me back $10.00; the 1 turn pot cost me a little over $1.00 and is precise enough for my needs. For really precision voltages I have a device I designed that uses 10 turn pots and a precision op-amp circuit that is stable to to .1 mv which makes it great for testing open loop op-amp gain. Anyway, I am really pleased with the supply. It will source 1500 ma up to 12 volts. At around 15 volts the current drops to about 750 ma since the transformers I am using only give a filtered output at 21 volts. The current draw at 15 volts starts to overwhelm the time constant of the filters. No biggie. However, I probably should have used bigger transformers but that would have added to the weight and would have crowded the layout. The goal of this project was to construct a unit with two isolated supplies that would emulate a differential power source while not breaking the bank since most designs I am working on utilize a +/- supply. I'd be more than happy to provide a BOM, a schematic, and construction notes if anyone is interested. ### ⭐⭐⭐⭐⭐ Worked great *by A***E on December 10, 2024* Allows you to adjust desired output voltage ### ⭐⭐⭐ So so but function is spotty. *by E***S on May 13, 2016* This product does as intended in that it allows you to vary the voltage from what comes in to output. However the adjustment is spotty and doesn't seem to work all the time. I'm still testing and hope I can find a happy medium for the adjustment so I can use this to reduce the voltage on a small solar panel. Build quality seems pretty good. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/5699607-riorandlm2596-dc-dc-buck-converter-step-down-module-power-supply](https://www.desertcart.us/products/5699607-riorandlm2596-dc-dc-buck-converter-step-down-module-power-supply) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-06-21*