{"product_id":"4894-7-5v-3a-step-down-voltage-regulator-d30v30f7","title":"7.5V, 3A Step-Down Voltage Regulator D30V30F7","description":"\u003cp\u003eThis small synchronous switching step-down (or buck) regulator takes an input voltage of up to 45 V and efficiently reduces it to \u003cstrong\u003e7.5 V.\u003c\/strong\u003e The board measures only 0.7″ × 0.8″ yet delivers typical maximum continuous output currents between \u003cstrong\u003e2 A\u003c\/strong\u003e and \u003cstrong\u003e3.5 A\u003c\/strong\u003e , depending on the input voltage. An optional enable input can put the regulator in a low-power state with a current draw of 10 µA to 20 µA per volt on VIN. The regulator also features reverse voltage protection and a power-good output that indicates when the regulator cannot adequately maintain the output voltage. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.\u003c\/p\u003e\n\n\u003cbr\u003e\u003ch2\u003e Overview\u003c\/h2\u003e\n\n\u003ctable class=\"picture_with_caption right\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J12303.1200.jpg?4f7551ae3638cc8e977627e7fb12083d\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id voltage regulator d30v30fx bottom view with dimensions. data-picture-id=\"0J12303\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12303.250.jpg?4f7551ae3638cc8e977627e7fb12083d\"\u003e\u003c\/a\u003e \u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003ctable class=\"picture_with_caption right\"\u003e\n\n\u003ctr\u003e\u003ctd style=\"max-width: 250px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J12305.1200.jpg?7140d97f7384addc5867431a880692c6\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id voltage regulator d30v30fx assembled on breadboard. data-picture-id=\"0J12305\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12305.250.jpg?7140d97f7384addc5867431a880692c6\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 250px\"\u003e \u003cp\u003eStep-Down Voltage Regulator D30V30Fx, assembled on breadboard.\u003c\/p\u003e\n\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003cp\u003e The D30V30Fx family of buck (step-down) voltage regulators generates lower output voltages from input voltages as high as 45 V. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters), which makes them much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large. These regulators can typically support continuous output currents between 2 A and 4 A, depending on the input voltage and output voltage (see the \u003cem\u003eMaximum continuous output current\u003c\/em\u003e section below). In general, the available output current is a little higher for the lower-voltage versions than it is for the higher-voltage versions, and it decreases as the input voltage increases.\u003c\/p\u003e\n\n\u003cp\u003e This family includes seven versions with fixed output voltages ranging from 3.3 V to 15 V:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/4891\"\u003eD30V30F3: Fixed 3.3V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\t \u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/product\/4892\"\u003eD30V30F5: Fixed 5V output\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/4893\"\u003eD30V30F6: Fixed 6V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/4894\"\u003eD30V30F7: Fixed 7.5V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/4895\"\u003eD30V30F9: Fixed 9V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/4896\"\u003eD30V30F12: Fixed 12V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/4897\"\u003eD30V30F15: Fixed 15V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e The regulators have reverse voltage protection up to 40 V, input under-voltage lockout, over-current protection, and short-circuit protection. A thermal shutdown feature also helps prevent damage from overheating and a soft-start feature limits the inrush current and gradually ramps the output voltage on startup.\u003c\/p\u003e\n\n \u003cp\u003eIf you need more output current, consider the very similar \u003ca href=\"https:\/\/www.pololu.com\/category\/270\/d36v50fx-step-down-voltage-regulators\"\u003eD36V50Fx family\u003c\/a\u003e of step-down voltage regulators, and if you need higher input voltages, consider the very similar \u003ca href=\"https:\/\/www.pololu.com\/category\/261\/d36v28fx-step-down-voltage-regulators\"\u003eD36V28Fx family\u003c\/a\u003e .\u003c\/p\u003e\n\n\u003cp class=\"note\"\u003e We manufacture these boards in-house at our Las Vegas facility, which gives us the flexibility to make these regulators with customized components to better meet the needs of your project. For example, if you have an application where the input voltage will always be below 20 V and efficiency is very important, we can make these regulators a bit more efficient at high loads by replacing the 40V reverse voltage protection MOSFET with a 20V one. We can also customize the output voltage. If you are interested in customization, please \u003ca href=\"\/en\/contact\"\u003econtact us\u003c\/a\u003e . \u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"max-width: 450px\"\u003e\u003cimg alt=\"\" class=\"\" data-gallery-pictures=\"[{\" id voltage regulator d30v30fx side view. data-picture-id=\"0J12304\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12304.450.jpg?7f86b62addcd5c8ec394f67d8ebf7fab\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 450px\"\u003e\u003cp\u003e Step-Down Voltage Regulator D30V30Fx, side view.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch2\u003e\n\n Details for item #4894 \n\n\u003c\/h2\u003e\n\n\u003ctable class=\"side_by_side_pics\"\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e \u003ctd style=\"max-width: 300px\"\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J12287.1200.jpg?e9dce8ca14129b252b429c18ceed5037\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d30v30f7 top view. data-picture-id=\"0J12287\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12287.300.jpg?e9dce8ca14129b252b429c18ceed5037\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 300px\"\u003e\u003cp\u003e 7.5V, 3A Step-Down Voltage Regulator D30V30F7, top view. \u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\u003ctd style=\"max-width: 300px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J12276.1200.jpg?03b67559d32ce5050c280e3d37894504\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id voltage regulator d30v30fx bottom view. data-picture-id=\"0J12276\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12276.300.jpg?03b67559d32ce5050c280e3d37894504\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 300px\"\u003e\u003cp\u003e Step-Down Voltage Regulator D30V30Fx, bottom view.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003ch3\u003e Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Input voltage: 7.5 V to 45 V (minimum input subject to dropout voltage considerations; see the \u003ca href=\"#dropout\"\u003edropout voltage section\u003c\/a\u003e for details)\u003c\/li\u003e\n\n\u003cli\u003e Output voltage: 7.5 V with 4% accuracy\u003c\/li\u003e\n\n\u003cli\u003e Typical maximum continuous output current: 2 A to 3.5 A (see the \u003ca href=\"#maxcurrent\"\u003emaximum continuous output current graph\u003c\/a\u003e below)\u003c\/li\u003e\n\n\u003cli\u003e Typical efficiency of 80% to 95%, depending on input voltage, output voltage, and load (see the \u003ca href=\"#efficiency\"\u003eefficiency graph\u003c\/a\u003e below)\u003c\/li\u003e\n\n\u003cli\u003e Very low dropout voltage\u003c\/li\u003e\n\n\u003cli\u003e Switching frequency: ~700 kHz under heavy loads\u003c\/li\u003e\n\n\u003cli\u003e Power-save mode that increases light load efficiency by reducing switching frequency\u003c\/li\u003e\n\n\t \u003cli\u003eLow quiescent current (see the \u003ca href=\"#quiescent\"\u003equiescent current graph\u003c\/a\u003e below)\u003c\/li\u003e\n\n\u003cli\u003e Enable input with precise cutoff threshold for disconnecting the load and putting the regulator into a low-power state that draws approximately 10 µA to 20 µA per volt on VIN\u003c\/li\u003e\n\n\u003cli\u003e “Power good” output indicates when the regulator cannot adequately maintain the output voltage\u003c\/li\u003e\n\n\u003cli\u003e Frequency spread spectrum operation that lowers peak EMI noise\u003c\/li\u003e\n\n\u003cli\u003e Under-voltage lockout protection\u003c\/li\u003e\n\n\u003cli\u003e Soft-start feature limits inrush current and gradually ramps output voltage\u003c\/li\u003e\n\n\u003cli\u003e Integrated reverse-voltage protection up to 40 V, over-current and short-circuit protection, over-temperature shutoff\u003c\/li\u003e\n\n\u003cli\u003e Compact size: 0.7″ × 0.8″ × 0.355″ (17.8 mm × 20.3 mm × 9 mm); see the \u003ca href=\"\/en\/file\/0J2002\/d30v30fx-step-down-voltage-regulators-dimensions.pdf\"\u003edimension diagram\u003c\/a\u003e (719k pdf) for more information\u003c\/li\u003e\n\n\u003cli\u003e Two 0.086″ mounting holes for #2 or M2 \u003ca href=\"https:\/\/www.pololu.com\/category\/101\/nuts-and-screws\"\u003escrews\u003c\/a\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e Using the Regulator\u003c\/h2\u003e\n\n\u003ch3\u003e Connections\u003c\/h3\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n \u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J12273.1200.jpg?de3790192ddccdc0eb9ebdb7e9387490\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id voltage regulator d30v30fx pinout. data-picture-id=\"0J12273\" data-picture-longest_side=\"1199\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12273.300.jpg?de3790192ddccdc0eb9ebdb7e9387490\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003cp\u003e This regulator has six connections: power good (PG), enable (EN), input voltage (VIN), output voltage (VOUT), and two ground (GND) connections.\u003c\/p\u003e\n\n\u003cp\u003e The “power good” indicator, \u003cstrong\u003ePG\u003c\/strong\u003e , is an open-drain output that goes low when the regulator's output voltage either rises more than 7.5% above or falls more than 9% below the nominal voltage (with hysteresis).\u003cins\u003e An external pull-up resistor is required to use this pin.\u003c\/ins\u003e\u003c\/p\u003e\n\n \u003cp\u003eThe regulator, which is enabled by default, can be put into a low-power sleep state by reducing the voltage on the \u003cstrong\u003eEN\u003c\/strong\u003e pin below 0.85 V, and it can be brought out of this state again by increasing the voltage on EN past 1 V The shutdown current draw in this sleep mode is dominated by the current in the 100 kΩ pull-up resistor from EN to VIN and in the reverse-voltage protection circuit, which altogether will be between 10 µA and 20 µA per volt on VIN. (Note that for high input voltages the, shutdown current draw when it is disabled is greater than the quiescent draw while enabled; see the \u003ca href=\"#quiescent\"\u003equiescent current graph\u003c\/a\u003e below for more details.) A low-voltage cutoff can be set by adding an appropriately sized external pull-down resistor between EN and GND. This resistor and the on-board 100 kΩ pull-up would together form a VIN voltage divider with the output connected to EN.\u003c\/p\u003e\n\n \u003cp\u003eThe input voltage, \u003cstrong\u003eVIN\u003c\/strong\u003e , powers the regulator. Voltages between 3.3 V and 45 V can be applied to VIN, but generally the effective lower limit of VIN is VOUT plus the regulator's dropout voltage, which varies approximately linearly with the load (see below for \u003ca href=\"#dropout\"\u003egraphs of the dropout voltage\u003c\/a\u003e as a function of the load).\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eVOUT\u003c\/strong\u003e is the regulated output voltage.\u003c\/p\u003e\n\n\u003ch3\u003e Included hardware \u003c\/h3\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"max-width: 350px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J12302.1200.jpg?d9f30b126265b439e2d83b6b723f4fcd\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id voltage regulator d30v30fx with included hardware. data-picture-id=\"0J12302\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12302.350.jpg?d9f30b126265b439e2d83b6b723f4fcd\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 350px\"\u003e\u003cp\u003e Step-Down Voltage Regulator D30V30Fx, with included hardware.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n \u003cp\u003eThe six connection through-holes are arranged on a 0.1″ grid for compatibility with solderless \u003ca href=\"https:\/\/www.pololu.com\/category\/28\/solderless-breadboards\"\u003ebreadboards\u003c\/a\u003e , \u003ca href=\"https:\/\/www.pololu.com\/category\/19\/connectors\"\u003econnectors\u003c\/a\u003e , and other prototyping arrangements that use a 0.1″ grid. The PG connection is the only one not located along the edge of the board. A 6×1 \u003ca href=\"https:\/\/www.pololu.com\/product\/965\"\u003estraight male header strip\u003c\/a\u003e and a 5×1 \u003ca href=\"https:\/\/www.pololu.com\/product\/967\"\u003eright-angle male header strip\u003c\/a\u003e are included with the regulator; one pin of the straight header can optionally be broken off and soldered into PG.\u003c\/p\u003e\n\n\u003ch3 id=\"efficiency\"\u003e Typical efficiency\u003c\/h3\u003e\n\n\u003cp\u003e The efficiency of a voltage regulator, defined as (Power out)\/(Power in), is an important measure of its performance, especially when battery life or heat are concerns. \u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center wide\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e\u003cimg alt=\"\" class=\"wide\" data-gallery-pictures=\"[{\" id efficiency of step-down voltage regulator d30v30f7. data-picture-id=\"0J12266\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12266.600.png?fd72d89bced572c26abaa9550b2c316e\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003ch3 id=\"maxcurrent\"\u003e Maximum continuous output current\u003c\/h3\u003e\n\n \u003cp\u003eThe maximum achievable output current of these regulators varies with the input voltage but also depends on other factors, including the ambient temperature, air flow, and heat sinking. The graph below shows maximum output currents that these regulators can deliver continuously at room temperature in still air and without additional heat sinking. \u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center wide\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e\u003cimg alt=\"\" class=\"wide\" data-gallery-pictures=\"[{\" id maximum continuous output current of step-down voltage regulator d30v30fx. data-picture-id=\"0J12272\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12272.600.png?e806eaa186b36eff21278f422d249a88\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003cp class=\"note_warning clear\"\u003e During normal operation, this product can get hot enough to burn you. Take care when handling this product or other components connected to it.\u003c\/p\u003e\n\n\u003ch3 id=\"quiescent\"\u003e Quiescent current\u003c\/h3\u003e\n\n\u003cp\u003e The quiescent current is the current the regulator uses just to power itself, and the graph below shows this for the different regulator versions as a function of the input voltage. The module's EN input can be driven low to put the board into a low-power state where it typically draws between 10 µA and 20 µA per volt on VIN. \u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center wide\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e\u003cimg alt=\"\" class=\"wide\" data-gallery-pictures=\"[{\" id quiescent current of step-down voltage regulator d30v30fx. data-picture-id=\"0J12271\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12271.600.png?9b27d54057efc344e6a4e4f02a283d92\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003ch3 id=\"dropout\"\u003e Typical dropout voltage\u003c\/h3\u003e\n\n \u003cp\u003eThe dropout voltage of a step-down regulator is the minimum amount by which the input voltage must exceed the regulator's target output voltage in order to ensure the target output can be achieved. For example, if a 5 V regulator has a 1 V dropout voltage, the input must be at least 6 V to ensure the output is the full 5 V. Generally speaking, the dropout voltage increases as the output current increases. The graph below shows the dropout voltages for the different members of this regulator family: \u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center wide\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e\u003cimg alt=\"\" class=\"wide\" data-gallery-pictures=\"[{\" id dropout voltage of step-down regulator d30v30fx. data-picture-id=\"0J12270\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J12270.600.jpg?41c1bc2e6523ae6b4eb17dfc7cb74f68\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e","brand":"Pololu","offers":[{"title":"2-4 Weeks","offer_id":47696623042905,"sku":"POL-4894","price":20.42,"currency_code":"EUR","in_stock":true},{"title":"1 day","offer_id":47885972308313,"sku":"POL-4894\/A","price":20.42,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/1009\/7753\/files\/0J12286.1200.jpg?v=1705454865","url":"https:\/\/robot-italy.com\/en\/products\/4894-7-5v-3a-step-down-voltage-regulator-d30v30f7","provider":"Robot Italy","version":"1.0","type":"link"}