--- product_id: 204864704 title: "- 5pcs JacobsParts MP1584 3.3V Fixed Output 3A DC Step Down Converter Buck Module 4.5-28V in" brand: "jacobsparts" price: "£15.59" currency: GBP in_stock: true reviews_count: 8 url: https://www.desertcart.co.uk/products/204864704-5pcs-jacobsparts-mp1584-3-3v-fixed-output-3a-dc-step store_origin: GB region: United Kingdom --- # 3A Peak Power 92% Efficiency Ultra Compact Size - 5pcs JacobsParts MP1584 3.3V Fixed Output 3A DC Step Down Converter Buck Module 4.5-28V in **Brand:** jacobsparts **Price:** £15.59 **Availability:** ✅ In Stock ## Summary > 🔋 Power Your Passion with Precision! ## Quick Answers - **What is this?** - 5pcs JacobsParts MP1584 3.3V Fixed Output 3A DC Step Down Converter Buck Module 4.5-28V in by jacobsparts - **How much does it cost?** £15.59 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/204864704-5pcs-jacobsparts-mp1584-3-3v-fixed-output-3a-dc-step) ## Best For - jacobsparts enthusiasts ## Why This Product - Trusted jacobsparts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Space-Saving Design:** Ultra-small dimensions (22x17x4mm) fit anywhere. - • **Versatile Input Range:** Compatible with 4.5-28V for diverse applications. - • **Power Up Your Projects:** Unleash 3A peak power for your micro-controller needs. - • **Cutting-Edge Efficiency:** Achieve up to 92% efficiency with synchronous rectification. - • **Whisper-Quiet Operation:** Less than 30mV ripple ensures smooth performance. ## Overview The JacobsParts MP1584 is a compact 3.3V fixed output DC step-down converter designed for efficiency and versatility. With a peak output of 3A and an input range of 4.5-28V, this module is perfect for powering micro-controllers and battery-operated devices. Its ultra-small size and high efficiency make it an essential component for modern electronic projects. ## Description ## Features - 3.3V fixed output non-isolated DC buck voltage regulator, ultra small module 22x17x4mm - Great for micro-controllers like the ESP8266, devices designed for 2x AA batteries, and more. - Input: 4.5-28V, Output:3.3V, 3A Peak / 1.5A Sustained - Efficiency: Up to 92% (depends on the difference between input and output voltage) This module uses synchronous rectification, the most efficient power conversion available. - 1.0MHz Switching Frequency, <30mV ripple (no load), MP1584 IC ## Images ![- 5pcs JacobsParts MP1584 3.3V Fixed Output 3A DC Step Down Converter Buck Module 4.5-28V in - Image 1](https://m.media-amazon.com/images/I/61fbhkiZo0L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Will this item truly supply a 5V output all the way down to 4.5V input?** A: No, it cannot boost; but it will pass the 4.5V rather than cutting out. Below 4.5V it may cut out entirely. **Q: any chance this will handle 24v for small cooling fans? I want to run 12v silent fans in a 24v system and love how tiny these are.?** A: No way will they handle 24v. I smoked 3 of them instantly with 12v before ordering some real Pololu converters. **Q: I have a 5v 6a dc power brick and i'm looking to split it into two 5v 3a sources using this as protection. will it work?** A: It looks like it accepts 3A but only outputs 5V 1.5A. I wouldn't waste your money if I were you. Get a different module, these tend to blow easily. **Q: What is the lowest input voltage?** A: Lowest input voltage as marked is 4.75 V. Anything lower becomes unstable. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Great value *by F***R on Reviewed in the United States on March 8, 2024* 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. ### ⭐⭐⭐⭐ 4.0 out of 5 stars Good product *by L***. on Reviewed in the United States on May 31, 2024* Good product ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Perfect for automotive lighting and general LED use *by A***I on Reviewed in the United States on February 13, 2018* 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. --- ## 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.co.uk/products/204864704-5pcs-jacobsparts-mp1584-3-3v-fixed-output-3a-dc-step](https://www.desertcart.co.uk/products/204864704-5pcs-jacobsparts-mp1584-3-3v-fixed-output-3a-dc-step) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-14*