{"product_id":"lm2596-dc-dc","title":"LM2596 3-Output DC-DC Buck Converter Module — 3.3V, 5V \u0026 Adjustable","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\r\n\u003cp\u003eThis compact DC-DC step-down power module provides three voltage rails: 3.3V, 5V, and an adjustable output. It is designed for electronic prototyping, sensor power distribution, and DIY projects that require multiple DC supply voltages. The 60 × 40 mm PCB includes a DC barrel input, a screw terminal input, an onboard power switch, and output indicator LEDs.\u003c\/p\u003e\r\n\u003cp\u003eEach rail provides five output\/GND connection positions for convenient wiring to multiple loads at the same voltage. These are three voltage rails, not fifteen independently regulated outputs.\u003c\/p\u003e\r\n\u003cp\u003eThis description covers the black PCB version with output headers not soldered. Images with installed headers illustrate the assembled connection layout.\u003c\/p\u003e\r\n\u003ch2\u003eFeatures\u003c\/h2\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eThree output rails: fixed 3.3V, fixed 5V, and one potentiometer-adjustable output.\u003c\/li\u003e\r\n\u003cli\u003eTwo input options: a DC barrel jack or a two-position screw terminal. Use only one input at a time.\u003c\/li\u003e\r\n\u003cli\u003eOnboard power switch: slide left to turn on, using the front-view orientation shown in the pinout diagram.\u003c\/li\u003e\r\n\u003cli\u003eOutput status LEDs: PWR1, PWR2, and PWR3 correspond to the 3.3V, 5V, and adjustable rails.\u003c\/li\u003e\r\n\u003cli\u003eFive connection pairs per rail: each output group has a 2 × 5 layout, with voltage outputs in the top row and GND in the bottom row.\u003c\/li\u003e\r\n\u003cli\u003eCompact mounting: 60 × 40 mm PCB with four corner mounting holes.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\r\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eModule type\u003c\/td\u003e\n\u003ctd\u003eDC-DC step-down \/ buck converter\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eProduct series designation\u003c\/td\u003e\n\u003ctd\u003eLM2596\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eBrand marking on PCB\u003c\/td\u003e\n\u003ctd\u003eRYDZ\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eVersion\u003c\/td\u003e\n\u003ctd\u003eBlack PCB; output headers not soldered\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eOutput rails\u003c\/td\u003e\n\u003ctd\u003e3.3V, 5V, and adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eMaximum input voltage\u003c\/td\u003e\n\u003ctd\u003e35V DC, as marked by the supplier on the PCB\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eRecommended input for fixed outputs\u003c\/td\u003e\n\u003ctd\u003e7–35V DC when using only 3.3V\/5V; application recommendation, not tested over the full range\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eInput for adjustable output\u003c\/td\u003e\n\u003ctd\u003eAbove the target output with sufficient headroom; 35V maximum; approximately 15V input recommended for 13.5V output\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eMinimum input voltage\u003c\/td\u003e\n\u003ctd\u003eNot specified by the supplier or established in this test\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eAdjustable output ceiling\u003c\/td\u003e\n\u003ctd\u003e13.5V, as marked by the supplier; achievable output depends on input voltage and load conditions\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eOutput current marking\u003c\/td\u003e\n\u003ctd\u003eSupplier-stated maximum of 3A per rail; this is not a continuous-load rating for one rail or all three rails simultaneously\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eInput connectors\u003c\/td\u003e\n\u003ctd\u003eDC005 barrel jack and KF301-2P screw terminal (5 mm pitch); use one only\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eOutput connections\u003c\/td\u003e\n\u003ctd\u003eThree 2 × 5 groups, with five voltage\/GND connection pairs per rail\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eVoltage adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard potentiometer for the adjustable rail\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003ePower control\u003c\/td\u003e\n\u003ctd\u003eOnboard slide switch\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003ePWR1, PWR2, and PWR3\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003ePCB dimensions\u003c\/td\u003e\n\u003ctd\u003e60 × 40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eMounting-hole center spacing\u003c\/td\u003e\n\u003ctd\u003e54 × 33.9 mm, according to the supplier's drawing\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\n\u003c\/table\u003e\r\n\u003cp\u003eUsable load current depends on input\/output voltage, cooling, wiring, and ambient temperature. The five connection pairs on each rail share that rail's current capacity; they are not individually rated for 3A. Do not connect different voltage outputs together.\u003c\/p\u003e\r\n\u003ch2\u003eChoosing the Input Supply\u003c\/h2\u003e\r\n\u003cp\u003eFor the fixed 3.3V and\/or 5V outputs only, the recommended input is 7–35V DC. This is an application recommendation. The supplier has not specified the module's minimum input voltage, and the full input range has not been tested in this evaluation.\u003c\/p\u003e\r\n\u003cp\u003eWhen using the adjustable output, select the input according to the target output voltage. The input must be higher than the target output, with sufficient voltage headroom for step-down regulation, and must not exceed 35V. Do not treat 12–35V as a universal operating range or assume that an arbitrarily small voltage difference is sufficient. If the fixed outputs are also used, their input requirements must also be met.\u003c\/p\u003e\r\n\u003cp\u003eFor example, an input of approximately 15V DC is recommended for a 13.5V output. The tested sample produced approximately 13.55V without an external load while the supply displayed 15.00V. Required headroom, voltage stability, and temperature rise under load have not been verified and should be checked in the intended application. A 12V input cannot be boosted to 13.5V by this module.\u003c\/p\u003e\r\n\u003cp\u003e35V is the supplier's maximum input limit. Allow for supply tolerance and voltage fluctuations so that the actual input does not exceed this limit.\u003c\/p\u003e\r\n\u003ch2\u003eNo-Load Test Results\u003c\/h2\u003e\r\n\u003cp\u003eThe following readings are from sample test photographs with no external load connected. Input values are the power supply's displayed readings, not separate measurements at the module's input terminals.\u003c\/p\u003e\r\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTest\u003c\/th\u003e\n\u003cth\u003eSupply display\u003c\/th\u003e\n\u003cth\u003eMultimeter output reading\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eAdjustable output, trimmer at minimum\u003c\/td\u003e\n\u003ctd\u003e20.00V\u003c\/td\u003e\n\u003ctd\u003e1.24V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eAdjustable output, trimmer at maximum\u003c\/td\u003e\n\u003ctd\u003e15.00V\u003c\/td\u003e\n\u003ctd\u003e13.55V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eAdjustable output, trimmer at maximum\u003c\/td\u003e\n\u003ctd\u003e20.00V\u003c\/td\u003e\n\u003ctd\u003e13.60V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eFixed 5V output\u003c\/td\u003e\n\u003ctd\u003e15.00V\u003c\/td\u003e\n\u003ctd\u003e5.03V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eFixed 3.3V output\u003c\/td\u003e\n\u003ctd\u003e15.00V\u003c\/td\u003e\n\u003ctd\u003e3.30V\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\n\u003c\/table\u003e\r\n\u003cp\u003eThe supplier specifies a maximum adjustable output of 13.5V. These sample readings are for reference only and do not establish a guaranteed adjustment range, output accuracy, or performance under load for all units. The 13.60V reading does not replace the specified output ceiling, and 1.24V is not a guaranteed adjustment minimum. Continuous current, full-load performance, and simultaneous loading of all three rails have not been tested.\u003c\/p\u003e\r\n\u003ch2\u003eConnections and Pinout\u003c\/h2\u003e\r\n\u003cp\u003eThe following positions refer to the component side facing you, with the input connectors at the top and output headers at the bottom.\u003c\/p\u003e\r\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePosition or marking\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\r\n\u003ctr\u003e\n\u003ctd\u003ePower Input 1: blue screw terminal\u003c\/td\u003e\n\u003ctd\u003eExternal DC input; follow the + \/ − markings on the PCB\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003ePower Input 2: black barrel jack\u003c\/td\u003e\n\u003ctd\u003eAlternative DC input connection\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eTop slide switch\u003c\/td\u003e\n\u003ctd\u003eModule power control; slide left to turn on\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eOrange potentiometer at the upper right\u003c\/td\u003e\n\u003ctd\u003eAdjusts the variable output voltage\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eLeft output group, top row\u003c\/td\u003e\n\u003ctd\u003e3.3V output\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eCenter output group, top row\u003c\/td\u003e\n\u003ctd\u003e5V output\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eRight output group, top row\u003c\/td\u003e\n\u003ctd\u003eAdjustable output\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003eBottom row of all three groups\u003c\/td\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003ctr\u003e\n\u003ctd\u003ePWR1 \/ PWR2 \/ PWR3\u003c\/td\u003e\n\u003ctd\u003e3.3V \/ 5V \/ adjustable-output indicators\u003c\/td\u003e\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\n\u003c\/table\u003e\r\n\u003cp\u003eThe top row is nearer the components; the bottom row is nearer the board edge. Left and right are reversed when viewing the back of the board. Always check the PCB markings.\u003c\/p\u003e\r\n\u003ch2\u003eGetting Started\u003c\/h2\u003e\r\n\u003col\u003e\r\n\u003cli\u003eWith power disconnected, check the required input and load voltages, polarity, and connection positions.\u003c\/li\u003e\r\n\u003cli\u003eConnect a DC supply to one input connector only. Do not use both inputs simultaneously.\u003c\/li\u003e\r\n\u003cli\u003eLeave the load disconnected and turn on the module. For the adjustable rail, measure between its output and GND with a multimeter, then adjust the potentiometer gradually to the required voltage.\u003c\/li\u003e\r\n\u003cli\u003eTurn power off, connect the load to the appropriate output and GND, then turn power on again.\u003c\/li\u003e\r\n\u003cli\u003eCheck output voltage and indicator LEDs. Monitor temperature and voltage stability under the actual load. Disconnect power and investigate any abnormal behavior.\u003c\/li\u003e\r\n\u003c\/ol\u003e\r\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eThis is a DC step-down module. It cannot boost a lower input voltage. The input must be above the required output with sufficient operating headroom.\u003c\/li\u003e\r\n\u003cli\u003eDo not exceed the supplier-marked 35V maximum input. A maximum rating is not a recommended continuous operating point.\u003c\/li\u003e\r\n\u003cli\u003eMeasure and set the adjustable output before connecting a load.\u003c\/li\u003e\r\n\u003cli\u003eUse only one input connector. Follow the polarity markings on the screw terminal.\u003c\/li\u003e\r\n\u003cli\u003eVerify plug dimensions and polarity before using a DC barrel power adapter.\u003c\/li\u003e\r\n\u003cli\u003eAvoid output shorts and do not parallel different voltage rails. Keep the underside of the PCB away from conductive surfaces.\u003c\/li\u003e\r\n\u003cli\u003eOutput headers are not soldered on this version. Soldering is required before using pin-header connections.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch2\u003eFAQ\u003c\/h2\u003e\r\n\u003ch3\u003eAre the five connection pairs five separate regulated outputs?\u003c\/h3\u003e\r\n\u003cp\u003eNo. The five pairs in each voltage group belong to the same rail and share its available load capacity.\u003c\/p\u003e\r\n\u003ch3\u003eCan both input connectors be used at the same time?\u003c\/h3\u003e\r\n\u003cp\u003eNo. Choose either the DC barrel jack or the screw terminal input.\u003c\/p\u003e\r\n\u003ch3\u003eIs the adjustable rail a fixed 12V output?\u003c\/h3\u003e\r\n\u003cp\u003eNo. Set it with the potentiometer and verify the voltage before connecting a load. The achievable voltage depends on the input supply and operating conditions.\u003c\/p\u003e\r\n\u003ch3\u003eCan it power any development board directly?\u003c\/h3\u003e\r\n\u003cp\u003eCheck the device's voltage, current, connector, and power-input requirements first. This module does not provide USB power negotiation, so a matching voltage alone does not establish compatibility.\u003c\/p\u003e","brand":"Geekworm","offers":[{"title":"Default Title","offer_id":67548926607673,"sku":"111111","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0068\/8481\/9002\/files\/LM2596-02-front-no-pins.jpg?v=1790508664","url":"https:\/\/geekworm.com\/en-au\/products\/lm2596-dc-dc","provider":"Geekworm","version":"1.0","type":"link"}