{"product_id":"2106-pololu-3-3v-600ma-step-down-voltage-regulator-d24v6f3","title":"Pololu 3.3V, 600mA Step-Down Voltage Regulator D24V6F3","description":"\u003cp\u003eThe compact (0.4″ × 0.5″) D24V6F3 switching step-down (or buck) voltage regulator takes an input voltage between 4.8 V and 42 V and efficiently reduces it to \u003cstrong\u003e3.3 V\u003c\/strong\u003e while allowing for a maximum output current of \u003cstrong\u003e600 mA\u003c\/strong\u003e . The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.\u003c\/p\u003e\n\n\u003cbr\u003e \u003cp class=\"note_warning\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e We recommend our newer \u003ca href=\"https:\/\/www.pololu.com\/category\/247\/d36v6x-step-down-voltage-regulators\"\u003e\u003cstrong\u003e600 mA D36V6Fx family\u003c\/strong\u003e\u003c\/a\u003e of step-down voltage regulators over this product. They offer a wider 4 V to 50 V operating voltage range and lower quiescent current, and they can generally be used as drop-in replacements for this product (they use the same PCB, just populated with different parts). Please also consider our \u003ca href=\"https:\/\/www.pololu.com\/category\/209\/d24v5fx-step-down-voltage-regulators\"\u003e\u003cstrong\u003e500 mA D24V5Fx\u003c\/strong\u003e\u003c\/a\u003e and \u003ca href=\"https:\/\/www.pololu.com\/category\/248\/d24v10fx-step-down-voltage-regulators\"\u003e\u003cstrong\u003e1 A D24V10Fx\u003c\/strong\u003e\u003c\/a\u003e families for synchronous alternatives that offer similar functionality with much lower dropout voltages and higher efficiencies at light loads. All of these newer families also have more output voltage options available.\u003c\/p\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\u003ch2\u003e Overview\u003c\/h2\u003e\n\n\u003cp\u003e These buck (step-down) voltage regulators generate lower output voltages from input voltages as high as 42 V. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) and have a typical efficiency between 80% to 90%, which is much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large. This regulator is available with a fixed 3.3 V, 5 V, 9 V, or 12 V output, and two versions are available for each voltage, one with a 300 mA maximum output current (D24V3Fx) and one with a 600 mA maximum output current (D24V6Fx):\u003c\/p\u003e\n\n \u003cp\u003eAlternatives available with variations in these parameter(s):\n \u003ca class=\"select_by_specification_link\" data-lightbox-link=\"true\" data-lightbox-height=\"20rem\" data-lightbox-width=\"50rem\" href=\"\/en\/catalog\/select-by-specification?parameters=0J130%2C0J50\u0026amp;product=2106\u0026amp;products=2097\"\u003e\u003cspan class=\"select_by_specification_parameter\"\u003eoutput voltage\u003c\/span\u003e \u003cspan class=\"select_by_specification_parameter\"\u003emaximum output current\u003c\/span\u003e\n \u003cspan class=\"select_by_specification_main_link\"\u003eSelect variant…\u003c\/span\u003e\n\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e We also offer versions of this regulator with a user-adjustable output voltage:\u003c\/p\u003e\n\n\u003cp\u003e Alternatives available with variations in these parameter(s):\n \u003ca class=\"select_by_specification_link\" data-lightbox-link=\"true\" data-lightbox-height=\"20rem\" data-lightbox-width=\"50rem\" href=\"\/en\/catalog\/select-by-specification?parameters=0J99%2C0J50\u0026amp;product=2106\u0026amp;products=2101\"\u003e\u003cspan class=\"select_by_specification_parameter\"\u003emaximum output voltage\u003c\/span\u003e \u003cspan class=\"select_by_specification_parameter\"\u003emaximum output current\u003c\/span\u003e\u003c\/a\u003e \n\u003cspan class=\"select_by_specification_main_link\"\u003eSelect variant…\u003c\/span\u003e\n\u003c\/p\u003e\n\n\u003cp\u003e The regulator has short-circuit protection, and thermal shutdown prevents damage from overheating. The board does \u003cstrong\u003enot\u003c\/strong\u003e have reverse-voltage protection.\u003c\/p\u003e\n\n\u003ch2\u003e Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Input voltage: [ \u003ci\u003eoutput voltage + dropout voltage\u003c\/i\u003e ] to 42 V (see below for more information on dropout voltage)\u003c\/li\u003e\n\n\u003cli\u003e Fixed 3.3 V, 5 V, 9 V, or 12 V output (depending on regulator version) with 4% accuracy\u003c\/li\u003e\n\n\u003cli\u003e Maximum output current: 300 mA or 600 mA (depending on regulator version)\u003c\/li\u003e\n\n\u003cli\u003e 1.25 MHz switching frequency\u003c\/li\u003e\n\n\u003cli\u003e 2 mA typical no-load quiescent current (20 μA typical quiescent current with \u003cfont style=\"text-decoration: overline;\"\u003eSHDN\u003c\/font\u003e = LOW)\u003c\/li\u003e\n\n\u003cli\u003e Integrated over-temperature and over-current 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\n\u003c\/ul\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\u003ch2\u003e Using the Regulator\u003c\/h2\u003e\n\n\u003ch3\u003e Connections\u003c\/h3\u003e\n\n\u003cp\u003e The buck 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\u003e The \u003cfont style=\"text-decoration: overline;\"\u003eSHDN\u003c\/font\u003e pin can be driven low (under 0.3 V) to turn off the output and put the board into a low-power state that typically draws 20 μA, and it can be driven high (above 2.3 V) to enable the board. If you do not need to use the shutdown feature, the \u003cfont style=\"text-decoration: overline;\"\u003eSHDN\u003c\/font\u003e pin can be directly connected to VIN to permanently enable the board. \u003cstrong\u003eYou should not leave this pin disconnected\u003c\/strong\u003e as this can result in unpredictable behavior.\u003c\/p\u003e\n\n \u003cp\u003eThe input voltage, VIN, should exceed VOUT by at least the regulator's dropout voltage (see below for graphs of dropout voltages as a function of the load), and you must ensure that noise on your input does not exceed the 42 V maximum. Additionally, please be wary of destructive LC spikes (see below for more information).\u003c\/p\u003e\n\n\u003cp\u003e The output voltage, VOUT, is fixed and depends on the regulator version: the D24VxF3 version outputs 3.3 V, the D24VxF5 version outputs 5 V, the D24VxF9 version outputs 9 V, and the D24VxF12 version outputs 12 V.\u003c\/p\u003e\n\n \u003cp\u003eThe four connections are labeled on the back side of the PCB, and they 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\/0J4269.1200.jpg?c1f7ffc329daad2e02266e0a9eb5d423\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24vxfx with included hardware. data-picture-id=\"0J4269\" data-picture-longest_side=\"800\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4269.300.jpg?c1f7ffc329daad2e02266e0a9eb5d423\"\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 and Output Current\u003c\/h3\u003e\n\n \u003cp\u003eThe 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. As shown in the graphs below, these switching regulators have typical efficiencies of 80% to 90%. \u003c\/p\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4274.1200.png?580ef6c6116dbf9314a02f04beb135e3\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of pololu step-down voltage regulator d24vxf3. data-picture-id=\"0J4274\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4274.400.jpg?580ef6c6116dbf9314a02f04beb135e3\"\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\n\u003c\/div\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4275.1200.png?712cd4c98a34bb3d4eef4e5549fa132c\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of pololu step-down voltage regulator d24vxf5. data-picture-id=\"0J4275\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4275.400.jpg?712cd4c98a34bb3d4eef4e5549fa132c\"\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\n\u003c\/div\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4276.1200.png?cd346eb6279adf12093aa159d1091ff3\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of pololu step-down voltage regulator d24vxf9. data-picture-id=\"0J4276\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4276.400.jpg?cd346eb6279adf12093aa159d1091ff3\"\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\n\u003c\/div\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4277.1200.png?ddb0ff2fddd46b714b8f3ace65ceedf2\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of pololu step-down voltage regulator d24vxf12. data-picture-id=\"0J4277\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4277.400.jpg?ddb0ff2fddd46b714b8f3ace65ceedf2\"\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\n\u003c\/div\u003e\n\n\u003cp class=\"clear\"\u003e Note that the above graphs apply to both the 300 mA and 600 mA versions, which is why the x axis extends to 600 mA. You should not expect to get more than 300 mA from the 300 mA versions (D24V3Fx). These graphs and ones below do\u003cins\u003e note \u003c\/ins\u003eapply to our newer 500 mA \u003ca href=\"2843\"\u003eD24V5Fx buck regulators\u003c\/a\u003e , which have different operating characteristics, including much lower dropout voltages.\u003c\/p\u003e\n\n\u003ch3\u003e Typical Dropout Voltage\u003c\/h3\u003e\n\n\u003cp\u003e The 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. The following graphs show the dropout voltages for the eight D24V3Fx and D24V6Fx regulators as a function of the output current: \u003c\/p\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4320.1200.png?5017efd095d38a16cd37f8a10a084f62\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id dropout voltage of pololu step-down regulator d24vxf3. data-picture-id=\"0J4320\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4320.400.jpg?5017efd095d38a16cd37f8a10a084f62\"\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\n\u003c\/div\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4321.1200.png?3079e6798f1c74f6391dcae652e14718\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id dropout voltage of pololu step-down regulator d24vxf5. data-picture-id=\"0J4321\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4321.400.jpg?3079e6798f1c74f6391dcae652e14718\"\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\n\u003c\/div\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4322.1200.png?4925e6a8227d9bd01344d8aa683114c4\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id dropout voltage of pololu step-down regulator d24vxf9. data-picture-id=\"0J4322\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4322.400.jpg?4925e6a8227d9bd01344d8aa683114c4\"\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\n\u003c\/div\u003e\n\n\u003cdiv style=\"float:left;\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n \u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J4323.1200.png?172089f52c6ace49b20f45211d7ac997\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id dropout voltage of pololu step-down regulator d24vxf12. data-picture-id=\"0J4323\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J4323.400.jpg?172089f52c6ace49b20f45211d7ac997\"\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\n\u003c\/div\u003e\n\n\u003cp class=\"clear\"\u003e As you can see from the last two graphs, the dropout voltage of the low-current 9 V and 12 V versions (D24V3F9 and D24V3F12) spikes as the output current nears the 300 mA limit. For similar regulators with much lower dropout voltages, please consider our newer 500 mA \u003ca href=\"2843\"\u003eD24V5Fx buck regulators\u003c\/a\u003e .\u003c\/p\u003e\n\n\u003ch3\u003e LC Voltage Spikes\u003c\/h3\u003e\n\n \u003cp\u003eWhen 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 (42 V), the regulator can be destroyed. In our tests with typical power leads (~30″ test clips), input voltages above 20 V caused spikes over 42 V. If you are connecting more than 20 V or your power leads or supply has high inductance, we recommend soldering at 33μF or larger electrolytic capacitor close to the regulator between VIN and GND. The capacitor should be rated for at least 50 V.\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":47696622354777,"sku":"POL-2106","price":10.17,"currency_code":"EUR","in_stock":true},{"title":"1 day","offer_id":47885971882329,"sku":"POL-2106\/A","price":10.17,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/1009\/7753\/files\/0J4327.1200_eda1cdbc-ab02-4c2b-b7cc-227bada4fc1d.jpg?v=1705454835","url":"https:\/\/robot-italy.com\/en\/products\/2106-pololu-3-3v-600ma-step-down-voltage-regulator-d24v6f3","provider":"Robot Italy","version":"1.0","type":"link"}