{"product_id":"2884-pololu-9v-15a-step-down-voltage-regulator-d24v150f9","title":"Pololu 9V, 15A Step-Down Voltage Regulator D24V150F9","description":"\u003cp\u003eThis synchronous switching step-down (or buck) regulator takes an input voltage of up to 40 V and efficiently reduces it to \u003cstrong\u003e9 V\u003c\/strong\u003e with an available output current of around \u003cstrong\u003e15 A\u003c\/strong\u003e.  Typical efficiencies of 80% to 95% along with its high current capabilities make this regulator well suited for powering large loads.  The regulator features reverse voltage protection and a power-good output that indicates when the regulator cannot adequately maintain the output voltage.\u003c\/p\u003e\n\u003cbr\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003ctable class=\"picture_with_caption right\"\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7405.1200.jpg?88be0ec0fc9752878a461f8764d2c310\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24v150fx bottom view with dimensions. data-picture-id=\"0J7405\" data-picture-longest_side=\"1253\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7405.300.jpg?88be0ec0fc9752878a461f8764d2c310\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\n\u003cp\u003eThe D24V150Fx family of step-down voltage regulators are high-current synchronous switching regulators that generate lower output voltages from input voltages as high as 40 V.  These types of regulators are also known as switched-mode power supplies (SMPS) or DC-to-DC converters, and they are much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large.  In particular, the D24V150Fx family of regulators have typical efficiencies of 80% to 95%, depending on factors like input voltage, output voltage, and load.\u003c\/p\u003e\n\u003cp\u003eThese regulators have an instantaneous current limit of approximately 32 A, but they are limited in the long term to much lower currents by power dissipation and the corresponding temperature rise that induces in the board.  The regulators can typically support continuous output currents between 5 A and 20 A without additional cooling (such as with a heat sink or forced airflow), depending on the input voltage and output voltage.  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.  See the \u003cem\u003eTypical efficiency and output current\u003c\/em\u003e section at the bottom of this page for more details.\u003c\/p\u003e\n\u003cp\u003eThese regulators have a typical quiescent (no load) current draw of around 100 mA, and an enable pin can be used to put the boards in a low-power state that reduces the quiescent current to approximately 5 µA to 10 µA per volt on VIN.\u003c\/p\u003e\n\u003cp class=\"clear note_warning\"\u003eDuring normal operation, this product can get hot enough to burn you. Even with very light loads, the regulator can run very hot if the input voltage is high, and the higher the input voltage the hotter the regulator will run.  Take care when handling this product or other components connected to it.\u003c\/p\u003e\n\u003cp\u003eThe modules have built-in reverse-voltage protection, short-circuit protection, a thermal shutdown feature that helps prevent damage from overheating, and a soft-start feature that reduces inrush current.  They also feature undervoltage lockout that disables the regulator if the input voltage falls below about 3.5 V.\u003c\/p\u003e\n\u003cp\u003eSeveral different fixed output voltages are available:\u003c\/p\u003e\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=\"\/catalog\/select-by-specification?parameters=0J130\u0026amp;product=2884\u0026amp;products=2885\"\u003e\u003cspan class=\"select_by_specification_parameter\"\u003eoutput voltage\u003c\/span\u003e\n\u003cspan class=\"select_by_specification_main_link\"\u003eSelect variant…\u003c\/span\u003e\n\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThe different voltage versions of this regulator all look very similar, so you should consider adding your own distinguishing marks or labels if you will be working simultaneously with multiple versions. A white box is provided on the bottom silkscreen of the regulator to make labeling easier.  This product page applies to all versions of the \u003ca href=\"https:\/\/www.pololu.com\/category\/207\/d24v150fx-step-down-voltage-regulators\"\u003eD24V150Fx family\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\t\u003cli\u003eInput voltage:\n\t\u003cul\u003e\n\t\t\u003cli\u003e4.5 V to 40 V for the version that outputs 3.3 V\u003c\/li\u003e\n\t\t\u003cli\u003e[\u003ci\u003eoutput voltage + dropout voltage\u003c\/i\u003e] to 40 V for output voltages of 5 V and higher (see below for more information on dropout voltage)\u003c\/li\u003e\n\t\u003c\/ul\u003e\n\u003c\/li\u003e\n\t\u003cli\u003eFixed 3.3 V, 5 V, 6 V, 7.5 V, 9 V, or 12 V output (depending on regulator version) with 4% accuracy\u003c\/li\u003e\n\t\u003cli\u003eTypical maximum continuous output current between 5 A and 20 A\u003c\/li\u003e\n\t\u003cli\u003eTypical efficiency of 80% to 95%, depending on input voltage, output voltage, and load\u003c\/li\u003e\n\t\u003cli\u003eIntegrated reverse-voltage protection, over-current and short-circuit protection, over-temperature shutoff, undervoltage lockout, and soft-start\u003c\/li\u003e\n\t\u003cli\u003eTypical no-load quiescent current of 100 mA ; this can be reduced to approximately 5 µA to 10 µA per volt on VIN by disabling the board\u003c\/li\u003e\n\t\u003cli\u003e“Power good” output indicates when the regulator cannot adequately maintain the output voltage\u003c\/li\u003e\n\t\u003cli\u003eCompact size:  1.7″ × 1.25″ × 0.43″ (43.2 mm × 31.8 mm × 11 mm)\u003c\/li\u003e\n\t\u003cli\u003eFour 0.086″ mounting holes for #2 or M2 \u003ca href=\"https:\/\/www.pololu.com\/category\/101\/nuts-and-screws\"\u003escrews\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eUsing the regulator\u003c\/h2\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cp\u003eThese buck regulators have six connections: input voltage (VIN), output voltage (VOUT), enable (EN), power good (PG), mode (MOD), and ground (GND).\u003c\/p\u003e\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7435.1200.png?419207b72325f3f1316ef294780ced73\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24v150fx top view with labeled pinout. data-picture-id=\"0J7435\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7435.250.jpg?419207b72325f3f1316ef294780ced73\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\n\u003cp\u003eThe input voltage, \u003cstrong\u003eVIN\u003c\/strong\u003e, powers the regulator.  Voltages between 4.5 V and 40 V can be applied to VIN, but for versions of the regulator that have an output voltage higher than 4.5 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 a graph of dropout voltages as a function of the load).\u003c\/p\u003e\n\u003cp\u003eThe output voltage, \u003cstrong\u003eVOUT\u003c\/strong\u003e, is fixed and depends on the regulator version: the \u003ca href=\"https:\/\/www.pololu.com\/product\/2880\"\u003eD24V150F3 version\u003c\/a\u003e outputs 3.3 V, the \u003ca href=\"https:\/\/www.pololu.com\/product\/2881\"\u003eD24V150F5 version\u003c\/a\u003e outputs 5 V, the \u003ca href=\"https:\/\/www.pololu.com\/product\/2882\"\u003eD24V150F6 version\u003c\/a\u003e outputs 6 V, the \u003ca href=\"https:\/\/www.pololu.com\/product\/2883\"\u003eD24V150F7 version\u003c\/a\u003e outputs 7.5 V, the \u003ca href=\"https:\/\/www.pololu.com\/product\/2884\"\u003eD24V150F9 version\u003c\/a\u003e outputs 9 V, and the \u003ca href=\"https:\/\/www.pololu.com\/product\/2885\"\u003eD24V150F12 version\u003c\/a\u003e outputs 12 V.\u003c\/p\u003e\n\u003cp\u003eThe regulator’s enable input, \u003cstrong\u003eEN\u003c\/strong\u003e, is pulled high (to 5 V)  internally, which enables the regulator by default.  The EN pin can be driven low (under 1 V) to disable the output and put the board into a low-power state.  The quiescent current draw in this sleep mode is dominated by the current in an internal pull-up resistor and the reverse-voltage protection circuit, which altogether will draw between 5 µA and 10 µA per volt on VIN when EN is held low.  To bring the board out of this low-power state, the EN pin should be pulled above 2 V.  If you do not need this feature, you can leave the EN pin disconnected.\u003c\/p\u003e\n\u003cp\u003eThe “power good” indicator, \u003cstrong\u003ePG\u003c\/strong\u003e, is an open-drain output that goes low when the regulator’s output falls below around 85% of the nominal voltage, including when the enable pin is held low, or rises above around 115% of the nominal voltage.  Otherwise, the PG pin is high-impedance, so an external pull-up resistor is required to use this pin.\u003c\/p\u003e\n\u003cp\u003eThe mode input, \u003cstrong\u003eMOD\u003c\/strong\u003e, is pulled low internally, which selects fixed-frequency operation by default.  This pin can be driven high (above 2 V, but not exceeding 5 V) to override fixed-frequency operation to reduce quiescent current (and therefore to increase efficiency) at light loads (on the order of a few milliamps).  This reduced-power feature is available when the input voltage is substantially higher than the output voltage (see the item-specific details section at the bottom of this page for more information).\u003c\/p\u003e\n\u003ctable class=\"picture_with_caption center\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"max-width: 300px\"\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7418.1200.jpg?5558955ac3a73cc3218f1b23328e2489\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24v150fx with included hardware. data-picture-id=\"0J7418\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7418.300.jpg?5558955ac3a73cc3218f1b23328e2489\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth style=\"max-width: 300px\"\u003e\u003cp\u003ePololu Step-Down Voltage Regulator D24V150Fx with included hardware.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe connections are labeled on the back side of the PCB, and the board offers several options for making electrical connections.  The three sets of smaller through-holes are arranged with a 0.1″ spacing 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 pieces of the included 13×1 \u003ca href=\"https:\/\/www.pololu.com\/product\/965\"\u003estraight male header strip\u003c\/a\u003e into these smaller holes.  Alternatively, you can solder the included \u003ca href=\"https:\/\/www.pololu.com\/product\/2440\"\u003e2-pin 5mm-pitch terminal blocks\u003c\/a\u003e to the two pairs of larger holes.  For the most compact installation, you can solder wires directly to the board.\u003c\/p\u003e\n\u003ctable class=\"side_by_side_pics\"\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\u003ctr\u003e\u003ctd style=\"max-width: 308px\"\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7433.1200.jpg?e4f6b206dc48caae9e2197a9bde52c89\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24v150fx in a breadboard assembled with terminal blocks and male headers. data-picture-id=\"0J7433\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7433.308.jpg?e4f6b206dc48caae9e2197a9bde52c89\"\u003e\u003c\/a\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth style=\"max-width: 308px\"\u003e\u003cp\u003ePololu Step-Down Voltage Regulator D24V150Fx in a breadboard, assembled with terminal blocks and male headers.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/td\u003e\n\t\t\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\u003ctr\u003e\u003ctd style=\"max-width: 250px\"\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7434.1200.jpg?d2a1f1f7dae8c3aa0cdbdc8dbc189514\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24v150fx showing wires soldered directly to the board. data-picture-id=\"0J7434\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7434.250.jpg?d2a1f1f7dae8c3aa0cdbdc8dbc189514\"\u003e\u003c\/a\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth style=\"max-width: 250px\"\u003e\u003cp\u003ePololu Step-Down Voltage Regulator D24V150Fx showing wires soldered directly to the board.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe board has four 0.086″ mounting holes intended for #2 or M2 \u003ca href=\"https:\/\/www.pololu.com\/category\/101\/nuts-and-screws\"\u003escrews\u003c\/a\u003e.  The mounting holes are in the four corners of the board and are separated by 1.53″ horizontally and 1″ vertically.  For all the board dimensions, see the \u003ca href=\"\/file\/0J1218\/d24v150fx-step-down-voltage-regulators-dimension-diagram.pdf\"\u003edimension diagram\u003c\/a\u003e (307k pdf).\u003c\/p\u003e\n\u003ch3\u003eTypical efficiency and output current\u003c\/h3\u003e\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.  This family of switching regulators typically has an efficiency of 80% to 95%, though the actual efficiency in a given system depends on input voltage, output voltage, and output current.  See the efficiency graph near the bottom of this page for more information.\u003c\/p\u003e\n\u003cp\u003eThe maximum achievable continuous output current is typically between 5 A and 20 A, but this depends on many factors, including the ambient temperature, air flow, heat sinking, and the input and output voltage.  See the continuous output current graph near the bottom of this page for more information.  The maximum instantaneous current is limited to approximately 32 A.\u003c\/p\u003e\n\u003ch3\u003eTypical dropout voltage\u003c\/h3\u003e\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.  See the “Details” section below for more information on the dropout voltage for this specific regulator version.\u003c\/p\u003e\n\u003ch2\u003e\nDetails for item #2884\n\u003c\/h2\u003e\n\u003ctable class=\"side_by_side_pics\"\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\u003ctr\u003e\u003ctd style=\"max-width: 275px\"\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7425.1200.jpg?946e5867f38eac7570d91aee40e720f8\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24v150f9 top view. data-picture-id=\"0J7425\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7425.275.jpg?946e5867f38eac7570d91aee40e720f8\"\u003e\u003c\/a\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth style=\"max-width: 275px\"\u003e\u003cp\u003ePololu 9V, 15A Step-Down Voltage Regulator D24V150F9, top view.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/td\u003e\n\t\t\u003ctd\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\u003ctr\u003e\u003ctd style=\"max-width: 275px\"\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7410.1200.jpg?7cc9513abe53e24c6f89b696bc70854e\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id step-down voltage regulator d24v150f9 bottom view. data-picture-id=\"0J7410\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7410.275.jpg?7cc9513abe53e24c6f89b696bc70854e\"\u003e\u003c\/a\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth style=\"max-width: 275px\"\u003e\u003cp\u003ePololu 9V, 15A Step-Down Voltage Regulator D24V150F9, bottom view.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe graphs below show the typical efficiency, maximum continuous current, and dropout voltage of the 9 V \u003cstrong\u003eD24V150F9\u003c\/strong\u003e regulator:\u003c\/p\u003e\n\u003cdiv class=\"left\"\u003e\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7382.1200.png?c2cc47806b9ad910d624e3faa1847515\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of pololu step-down voltage regulator d24v150f9. data-picture-id=\"0J7382\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7382.400.jpg?c2cc47806b9ad910d624e3faa1847515\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"left\"\u003e\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7431.1200.png?5c0129af6ab535c2ccf72a48aff47bb6\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id maximum continuous current of pololu step-down voltage regulator d24v150f9. data-picture-id=\"0J7431\" data-picture-longest_side=\"640\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7431.400.jpg?5c0129af6ab535c2ccf72a48aff47bb6\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"left\"\u003e\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J7390.1200.png?f0e5223fb1dee4c9e6cdcf2c26bb99a2\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id dropout voltage of pololu step-down regulator d24v150f9. data-picture-id=\"0J7390\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J7390.400.jpg?f0e5223fb1dee4c9e6cdcf2c26bb99a2\"\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"clear\"\u003ePower-save mode for the 9V version\u003c\/h3\u003e\n\u003cp\u003eFor this \u003cstrong\u003e9 V\u003c\/strong\u003e regulator version, the power-save mode is available for input voltages above \u003cstrong\u003e20 V\u003c\/strong\u003e.  See the \u003cem\u003eConnections\u003c\/em\u003e section above for details on the MOD pin, which is used to activate this mode.\u003c\/p\u003e","brand":"Pololu","offers":[{"title":"2-4 Settimane","offer_id":47696613671257,"sku":"POL-2884","price":117.05,"currency_code":"EUR","in_stock":true},{"title":"1 Giorno","offer_id":47885969359193,"sku":"POL-2884\/A","price":117.05,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/1009\/7753\/files\/0J7416.1200.jpg?v=1705454703","url":"https:\/\/robot-italy.com\/products\/2884-pololu-9v-15a-step-down-voltage-regulator-d24v150f9","provider":"Robot Italy","version":"1.0","type":"link"}