{"product_id":"3795-9v-600ma-step-down-voltage-regulator-d36v6f9","title":"9V, 600mA Step-Down Voltage Regulator D36V6F9","description":"\u003cp\u003e This compact (0.4″ × 0.5″) switching step-down (or buck) voltage regulator takes input voltages up to 50 V and efficiently reduces them to \u003cstrong\u003e9 V\u003c\/strong\u003e while allowing for a maximum output current of \u003cstrong\u003e600 mA\u003c\/strong\u003e . It has a very low dropout, so it can be used with input voltages that are within a few hundred millivolts of its output. 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\n\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4270.1200.jpg?2b609a2c91b3affea9e195c0296b94ee\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d36v6fx bottom view with dimensions. data-picture-id=\"0J4270\" data-picture-longest_side=\"419\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4270.250.jpg?2b609a2c91b3affea9e195c0296b94ee\"\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: 251px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4273.1200.jpg?c47a169c87aeeb838a2e4fbe6c9227da\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d36v6fx next to a in to-220 package. data-picture-id=\"0J4273\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4273.251.jpg?c47a169c87aeeb838a2e4fbe6c9227da\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 251px\"\u003e\u003cp\u003e Pololu step-down voltage regulator D36V6Fx\/D24V6Fx\/D24V3Fx next to a 7805 voltage regulator in TO-220 package.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003cp\u003e The D36V6x family of buck (step-down) voltage regulators generates lower output voltages from input voltages as high as 50 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. This family includes seven versions with fixed output voltages ranging from 3.3 V to 15 V and two adjustable versions that can be set using a trimmer potentiometer:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3791\"\u003eD36V6F3: Fixed 3.3V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\t \u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/product\/3792\"\u003eD36V6F5: Fixed 5V output\u003c\/a\u003e\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3793\"\u003eD36V6F6: Fixed 6V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3794\"\u003eD36V6F7: Fixed 7.5V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3795\"\u003eD36V6F9: Fixed 9V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3796\"\u003eD36V6F12: Fixed 12V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3797\"\u003eD36V6F15: Fixed 15V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3798\"\u003eD36V6ALV: Adjustable 2.5 – 7.5 V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e \u003ca href=\"https:\/\/www.pololu.com\/product\/3799\"\u003eD36V6AHV: Adjustable 4 – 25 V output\u003c\/a\u003e\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e The regulators feature short-circuit\/over-current protection, and thermal shutdown helps prevent damage from overheating. The boards do \u003cstrong\u003enot\u003c\/strong\u003e have reverse-voltage protection.\u003c\/p\u003e\n\n\u003ch2\u003e\n\n Details for item #3795\n\n\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\/0J4271.1200.jpg?5980e69db7522552c6f985a5e904db92\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulators d36v6fx in a breadboard. data-picture-id=\"0J4271\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4271.250.jpg?5980e69db7522552c6f985a5e904db92\"\u003e\u003c\/a\u003e\n\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\u003ctr\u003e \u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4272.1200.jpg?231457569ed30d372150309c2c4b697b\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d36v6fx in a breadboard. data-picture-id=\"0J4272\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4272.250.jpg?231457569ed30d372150309c2c4b697b\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003ch3\u003e Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Input voltage: 9.2 V to 50 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: 9 V with 4% accuracy\u003c\/li\u003e\n\n\u003cli\u003e Maximum output current: 600 mA (see the \u003ca href=\"#maxcurrent\"\u003emaximum continuous output current graph\u003c\/a\u003e below)\u003c\/li\u003e\n\n\u003cli\u003e Fixed 2.1 MHz switching frequency\u003c\/li\u003e\n\n\u003cli\u003e High-voltage enable input can put the board into a low-power state where it draws less than 2 μA (typical)\u003c\/li\u003e\n\n\u003cli\u003e Low quiescent current: \u0026lt; 0.2 mA (see the \u003ca href=\"#quiescent\"\u003equiescent current graph\u003c\/a\u003e below)\u003c\/li\u003e\n\n\u003cli\u003e Over-current and short-circuit protection, over-temperature shutoff\u003c\/li\u003e\n\n\u003cli\u003e Small size: 0.5″ × 0.4″ × 0.1″ (13 mm × 10 mm × 3 mm)\u003c\/li\u003e\n\n\u003cli\u003e Weight: 0.5 g\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3\u003e Connections\u003c\/h3\u003e\n\n\u003cp\u003e This regulator has four connections: shutdown ( \u003cfont style=\"text-decoration: overline;\"\u003eSHDN\u003c\/font\u003e ), input voltage (VIN), ground (GND), and output voltage (VOUT).\u003c\/p\u003e\n\n \u003cp\u003eThe \u003cfont style=\"text-decoration: overline;\"\u003eSHDN\u003c\/font\u003e pin can be driven low (under 1.25 V) to turn off the output and put the board into a low-power state (\u0026lt; 2 μA typical). The regulator is enabled by default, and this input can be left disconnected if you do not need this feature.\u003c\/p\u003e\n\n\u003cp\u003e The input voltage, VIN, powers the regulator. Voltages between 4 V and 50 V can be applied to VIN, but for versions of the regulator that have an output voltage higher than 4 V, 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). Additionally, please be wary of destructive LC spikes ( \u003ca href=\"#lcspikes\"\u003esee below for more information\u003c\/a\u003e ).\u003c\/p\u003e\n\n \u003cp\u003eThe four connections are labeled on the back side of the PCB and are arranged with a 0.1″ spacing along the edge of the board 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. You can solder wires directly to the board or solder in either the 4×1 \u003ca href=\"https:\/\/www.pololu.com\/product\/965\"\u003estraight male header strip\u003c\/a\u003e or the 4×1 \u003ca href=\"https:\/\/www.pololu.com\/product\/967\"\u003eright-angle male header strip\u003c\/a\u003e that is included.\u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J9263.1200.jpg?9db312b8a8d9563866e88513f0e70167\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id voltage regulator d36v6fx with included male headers. data-picture-id=\"0J9263\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J9263.300.jpg?9db312b8a8d9563866e88513f0e70167\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003ch3\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 d36v6f9. data-picture-id=\"0J9271\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J9271.600.png?b59266b249fb90c7e2b33636ec4b6487\"\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 continous output currents of step-down voltage regulator d36v6fx. data-picture-id=\"0J9275\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J9275.600.png?312f87aa66802d4fa75ce2e9c955e929\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\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 \u003cfont style=\"text-decoration: overline;\"\u003eSHDN\u003c\/font\u003e input can be driven low to put the board into a low-power state where it typically draws under 2 μA. \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 currents of step-down voltage regulator d36v6fx. data-picture-id=\"0J9276\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J9276.600.png?d675910d3bbe2c407ac671d66e89e6fc\"\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 voltages of step-down voltage regulator d36v6fx. data-picture-id=\"0J9274\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J9274.600.png?0b3db6a3cc882ed86a45f30cee26fa9c\"\u003e\u003c\/td\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/tr\u003e\u003c\/table\u003e\n\n\u003cp class=\"clear\"\u003e\u003c\/p\u003e\n\n\u003ch2 id=\"lcspikes\"\u003eLC voltage spikes\u003c\/h2\u003e\n\n\u003cp\u003e When connecting voltage to electronic circuits, the initial rush of current can cause voltage spikes that are much higher than the input voltage. If these spikes exceed the regulator's maximum voltage (50 V), the regulator can be destroyed. In our tests with typical power leads (~30″ test clips), input voltages above 28 V caused spikes over 50 V.\u003c\/p\u003e\n\n \u003cp class=\"note_warning\"\u003eIf you are connecting more than 28 V or your power leads or supply has high inductance, we recommend soldering a suitably rated 33 μF or larger electrolytic capacitor close to the regulator between VIN and GND.\u003c\/p\u003e\n\n\u003cp\u003e More information about LC spikes can be found in our application note, \u003ca href=\"https:\/\/www.pololu.com\/docs\/0J16\"\u003eUnderstanding Destructive LC Voltage Spikes\u003c\/a\u003e .\u003c\/p\u003e","brand":"Pololu","offers":[{"title":"2-4 Weeks","offer_id":47696624648537,"sku":"POL-3795","price":10.17,"currency_code":"EUR","in_stock":true},{"title":"1 day","offer_id":47885973061977,"sku":"POL-3795\/A","price":10.17,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/1009\/7753\/files\/0J9260.1200.jpg?v=1705454956","url":"https:\/\/robot-italy.com\/en\/products\/3795-9v-600ma-step-down-voltage-regulator-d36v6f9","provider":"Robot Italy","version":"1.0","type":"link"}