{"product_id":"2869-2-5-9v-fine-adjust-step-up-step-down-voltage-regulator-s9v11ma","title":"2.5-9V Fine-Adjust Step-Up\/Step-Down Voltage Regulator S9V11MA","description":"\u003cp\u003eThe S9V11MA switching step-up\/step-down regulator efficiently produces a finely adjustable output between 2.5 V and 9 V whether it is higher or lower than the input voltage, which can range from 2 V to 16 V. (Note: minimum start- up voltage is 3 V, but it operates to 2 V after that.) The compact (0.5″ × 0.6″) module can supply a typical output current of up to 1.5 A when the input voltage is close to the output voltage.\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\/0J8236.1200.jpg?4ea20cd5eecce0aa83b5063620ef8175\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id fine-adjust step-up voltage regulator w adjustable low-voltage cutoff s9v11macma next to us quarter dollar for size reference. data-picture-id=\"0J8236\" data-picture-longest_side=\"982\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8236.300.jpg?4ea20cd5eecce0aa83b5063620ef8175\"\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 \u003cp\u003eThe S9V11x family of efficient switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) use a buck-boost topology to convert both higher and lower input voltages to a regulated output voltage. They take input voltages from 2 V to 16 V and increase or decrease them as necessary, offering a typical efficiency of over 85% and a typical output current of up to 1.5 A. The flexibility in input voltage offered by this family of regulators is especially well-suited for battery-powered applications in which the battery voltage begins above the regulated voltage and drops below as the battery discharges. Without the typical restriction on the battery voltage staying above the required voltage throughout its life, new battery packs and form factors can be considered.\u003c\/p\u003e\n\n \u003cp\u003eThe different members of this family offer different output voltage options, from fixed voltages with selectable alternatives to adjustable voltages that can be set anywhere between 2.5 V and 9 V using a precision 12-turn potentiometer. Some versions also have an adjustable low-voltage cutoff that can be set anywhere in the 2 V to 16 V output voltage range and used to prevent your battery from over-discharging. This is particularly useful for battery chemistry that can be damaged when over-discharged, including Li-ion and LiPo. The chart below lists all the regulators in the S9V11x family along with the key features of each version: \u003c\/p\u003e\n\n\u003cstyle type=\"text\/css\"\u003e\ntable.active_controller_comparison td.spacer {border: none; background: white;}\ntable.active_controller_comparison td.white {background: white};\n\u003c\/style\u003e\n\u003cdiv align=\"center\"\u003e\n\n\u003ctable style=\"margin-bottom: 1em;\" class=\"active_controller_comparison\"\u003e\n\n\u003ctr\u003e\n\n\u003cth style=\"text-align:center;\" colspan=\"2\"\u003e Regulator\u003c\/th\u003e\n\n\u003cth\u003e Inputs (V)\u003c\/th\u003e\n\n\u003cth\u003e Output (V)\u003c\/th\u003e\n\n\u003cth\u003e Low-voltage cutoff\u003c\/th\u003e\n\n\u003cth\u003e Size\u003c\/th\u003e\n\n\u003cth class=\"price\"\u003e Price \u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"background: white;\"\u003e\u003cimg src=\"https:\/\/a.pololu-files.com\/picture\/0J8220.60x60.jpg?8fe84e26cd6abb676af10b759341d05f\" alt=\"\"\u003e\u003c\/td\u003e\n\n\u003cth style=\"text-align:left;\"\u003e\n\n \u003ca href=\"https:\/\/www.pololu.com\/product\/2868\"\u003e\u003cstrong\u003e#2868 S9V11MACMA\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\n\u003ctd style=\"background: white;\" rowspan=\"7\"\u003e 2* – 16\u003c\/td\u003e\n\n\u003ctd\u003e 2.5 – 9 (fine-adjust)\u003c\/td\u003e\n\n\u003ctd\u003e fine-adjust\u003c\/td\u003e\n\n\u003ctd rowspan=\"4\"\u003e 0.50″ × 0.60″ × 0.25″\u003c\/td\u003e\n\n\u003ctd\u003e \u003cspan class=\"price\"\u003e$13.95\u003c\/span\u003e \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"background: white;\"\u003e\u003cimg src=\"https:\/\/a.pololu-files.com\/picture\/0J8241.60x60.jpg?56f898626738716ac8c36880e32c2390\" alt=\"\"\u003e\u003c\/td\u003e\n\n\u003cth style=\"text-align:left;\"\u003e\n\n \u003ca href=\"https:\/\/www.pololu.com\/product\/2869\"\u003e\u003cstrong\u003e#2869 S9V11MA\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/th\u003e \n\u003ctd\u003e2.5 – 9 (fine-adjust)\u003c\/td\u003e\n\n\u003ctd\u003e –\u003c\/td\u003e\n\n\u003ctd\u003e \u003cspan class=\"price\"\u003e$10.95\u003c\/span\u003e \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"background: white;\" rowspan=\"2\"\u003e\u003cimg src=\"https:\/\/a.pololu-files.com\/picture\/0J8250.60x60.jpg?d0e073f874bce120302365f1ef1280a0\" alt=\"\"\u003e\u003c\/td\u003e\n\n\u003cth style=\"text-align:left;\"\u003e\n\n \u003ca href=\"https:\/\/www.pololu.com\/product\/2870\"\u003e\u003cstrong\u003e#2870 S9V11F5S6CMA\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 5 (6V selectable)\u003c\/td\u003e\n\n\u003ctd\u003e fine-adjust\u003c\/td\u003e\n\n\u003ctd\u003e \u003cspan class=\"price\"\u003e$10.95\u003c\/span\u003e\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth style=\"text-align:left;\"\u003e\n\n \u003ca href=\"https:\/\/www.pololu.com\/product\/2871\"\u003e\u003cstrong\u003e#2871 S9V11F3S5CMA\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 3.3 (5V selectable)\u003c\/td\u003e\n\n\u003ctd\u003e fine-adjust\u003c\/td\u003e\n\n\u003ctd\u003e \u003cspan class=\"price\"\u003e$10.95\u003c\/span\u003e \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"background: white;\" rowspan=\"2\"\u003e\u003cimg src=\"https:\/\/a.pololu-files.com\/picture\/0J8262.60x60.jpg?67860bf1e25776eee1c2ba95050e672f\" alt=\"\"\u003e\u003c\/td\u003e\n\n\u003cth style=\"text-align:left;\"\u003e\n\n \u003ca href=\"https:\/\/www.pololu.com\/product\/2872\"\u003e\u003cstrong\u003e#2872 S9V11F3S5\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 3.3 (5V selectable)\u003c\/td\u003e\n\n\u003ctd\u003e –\u003c\/td\u003e\n\n\u003ctd style=\"background:white;\" rowspan=\"2\"\u003e 0.50″ × 0.60″ × 0.17″\u003c\/td\u003e\n\n\u003ctd\u003e \u003cspan class=\"price\"\u003e$7.95\u003c\/span\u003e\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth style=\"text-align:left;\"\u003e\n\n \u003ca href=\"https:\/\/www.pololu.com\/product\/2873\"\u003e\u003cstrong\u003e#2873 S9V11F3S5C3\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 3.3 (5V selectable)\u003c\/td\u003e\n\n\u003ctd\u003e 3V (fixed)\u003c\/td\u003e\n\n\u003ctd\u003e \u003cspan class=\"price\"\u003e$7.95\u003c\/span\u003e \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"background: white;\"\u003e\u003cimg src=\"https:\/\/a.pololu-files.com\/picture\/0J7671.40x40.jpg?97f278ca7c7f846fb9403d25a6f25c34\" alt=\"\"\u003e\u003c\/td\u003e\n\n\u003cth style=\"text-align:left;\"\u003e\n\n \u003ca href=\"https:\/\/www.pololu.com\/product\/2836\"\u003e\u003cstrong\u003e#2836 S9V11F5\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 5\u003c\/td\u003e\n\n\u003ctd\u003e –\u003c\/td\u003e\n\n\u003ctd\u003e 0.30″ × 0.45″ × 0.17″\u003c\/td\u003e\n\n\u003ctd\u003e \u003cspan class=\"price\"\u003e$8.95\u003c\/span\u003e\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd class=\"spacer\" colspan=\"7\"\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"text-align: left;\" class=\"spacer\" colspan=\"7\"\u003e \n\u003cb\u003e*\u003c\/b\u003e The regulator has a minimum start-up voltage of 3 V, but it can operate down to 2 V after startup. It is disabled when the input voltage is below the low-voltage cutoff. \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003ctable class=\"side_by_side_pics\"\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"vertical-align: bottom;\"\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\u003ctd style=\"max-width: 250px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J8274.1200.jpg?0fdcd365d301e4fb9a7d1fc7ec5d1da3\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id up down regulator s9v11macma on a breadboard. data-picture-id=\"0J8274\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8274.250.jpg?0fdcd365d301e4fb9a7d1fc7ec5d1da3\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 250px\"\u003e\u003cp\u003e Step up\/step down regulator S9V11MACMA on a breadboard. \u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/td\u003e\n\n\u003ctd style=\"vertical-align: bottom;\"\u003e\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\u003ctd style=\"max-width: 266px\"\u003e \u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J8239.1200.jpg?cfc22b27c35c027b92a3e824c311cee7\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id up down regulator s9v11f3s5 on a breadboard. data-picture-id=\"0J8239\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8239.266.jpg?cfc22b27c35c027b92a3e824c311cee7\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\n\n\u003ctr\u003e\u003cth style=\"max-width: 266px\"\u003e\u003cp\u003e Step up\/step down regulator S9V11F3S5 on a breadboard.\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\u003cp\u003e These regulators have short-circuit protection, and thermal shutdown prevents damage from overheating; they do \u003cstrong\u003enot\u003c\/strong\u003e have reverse-voltage protection. Note that the startup current is limited to approximately 700 mA until the output voltage reaches the nominal voltage; after startup, the available current is a function of the input voltage (see the \u003cem\u003eTypical efficiency and output current\u003c\/em\u003e section below).\u003c\/p\u003e\n\n\u003ch2\u003e\n\n Details for item #2869\n\n\u003c\/h2\u003e\n\n\u003ch2\u003e Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\t \u003cli\u003eInput voltage: 2 V to 16 V (note: this regulator requires 3 V to start, but it can operate down to 2 V after startup)\u003c\/li\u003e\n\n\u003cli\u003e Output voltage: 2.5 V to 9 V (precision-adjustable using built-in 12-turn potentiometer)\u003c\/li\u003e\n\n\u003cli\u003e Typical maximum continuous output current: 1.5 A (when input voltage is close to the output; the \u003cem\u003eTypical efficiency and output current\u003c\/em\u003e section below shows how the achievable continuous output current depends on the input and output voltages)\u003c\/li\u003e\n\n\u003cli\u003e Power-good indicator can be used to tell when the regulator has reached and is maintaining its target output voltage\u003c\/li\u003e\n\n\u003cli\u003e Power-saving feature maintains high efficiency at low currents (quiescent current is less than 1 mA while enabled and approximately 7 µA per volt on VIN when regulator is disabled)\u003c\/li\u003e\n\n\u003cli\u003e Integrated over-temperature and short-circuit protection\u003c\/li\u003e\n\n\u003cli\u003e Small size: 0.5″ × 0.6″ × 0.25″ (12.7 × 15.3 × 6.4 mm)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e Using the Regulator\u003c\/h2\u003e\n\n \u003cp class=\"note_warning\"\u003eDuring 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\u003e Connections\u003c\/h3\u003e\n\n\u003cp\u003e The step-up\/step-down regulator has five main connections all located along the same edge of the board: the output voltage (OUT), ground (GND), the input voltage (IN), an enable input (EN), and a power good indicator (PG). The board also contains a through-hole labeled SEL that is not used on this version of the regulator.\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\/0J8231.1200.jpg?d9ad93b48d9daea426a2487a89e31052\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id fine-adjust step-up voltage regulator s9v11ma labeled pinout. data-picture-id=\"0J8231\" data-picture-longest_side=\"899\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8231.500.jpg?d9ad93b48d9daea426a2487a89e31052\"\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\u003cp\u003e The output voltage, \u003cstrong\u003eVOUT\u003c\/strong\u003e , is determined by the trimmer potentiometer position. See the \u003cem\u003eSetting the output voltage\u003c\/em\u003e section below for details.\u003c\/p\u003e\n\n\u003cp\u003e The input voltage, \u003cstrong\u003eVIN\u003c\/strong\u003e , should be between 3 V and 16 V when the regulator is first powered. After it is running, it can continue operating down to 2 V. Lower inputs can shut down the voltage regulator;  \u003cins\u003ehigher inputs can destroy the regulator\u003c\/ins\u003e , so you should ensure that noise on your input is not excessive, and you should be wary of destructive LC spikes (see below for more information).\u003c\/p\u003e\n\n\u003cp\u003e The 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 below 0.7 V, and it can be brought out of this state again by increasing the voltage on EN past 0.8 V. The quiescent current draw in this sleep mode is dominated by the current in the 100 kΩ pull-up resistor from ENABLE to VIN, which is approximately 10 µA per volt on VIN (eg approximately 30 µA with 3 V in). The tight tolerance of the enable input allows a precise low-VIN cutoff to be set, such as with the output of an external voltage divider powered by VIN, which is useful for battery powered applications where draining the battery below a particular voltage threshold could permanently damage it.\u003c\/p\u003e\n\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 90% of the nominal voltage, including when the enable pin is held low. The power good indicator is held low until the output reaches 95% of the nominal voltage when it is powering up or coming out of low-power mode. Otherwise, the PG pin is high-impedance, so an external pull-up resistor is required to use this pin.\u003c\/p\u003e\n\n\u003ch3\u003e Included hardware\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\/0J8245.1200.jpg?d96712e3c26b51dc4f61cc4c21ef4449\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id fine-adjust step-up voltage regulator w adjustable low-voltage cutoff s9v11ma with included optional header pins. data-picture-id=\"0J8245\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8245.350.jpg?d96712e3c26b51dc4f61cc4c21ef4449\"\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 \u003cp\u003eThe through-holes are arranged with a 0.1″ spacing along the edge of the board for compatibility with standard \u003ca href=\"https:\/\/www.pololu.com\/category\/28\/solderless-breadboards\"\u003esolderless breadboards\u003c\/a\u003e and perfboards and \u003ca href=\"https:\/\/www.pololu.com\/category\/19\/connectors\"\u003econnectors\u003c\/a\u003e that use a 0.1″ grid. You can solder wires directly to the board or solder in pieces of the included breakaway 6×1 \u003ca href=\"https:\/\/www.pololu.com\/product\/965\"\u003estraight male header strip\u003c\/a\u003e or the 5×1 \u003ca href=\"https:\/\/www.pololu.com\/product\/967\"\u003eright-angle male header strip\u003c\/a\u003e as desired.\u003c\/p\u003e\n\n\u003ch3\u003e Setting the output voltage\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\/0J8247.1200.jpg?ed4fe4831f8d4b1fd2bdc494d50c1919\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id multi-turn potentiometer can be used to adjust the output voltage of s9v11max regulators. data-picture-id=\"0J8247\" data-picture-longest_side=\"1200\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8247.150h.jpg?ed4fe4831f8d4b1fd2bdc494d50c1919\"\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\u003cp\u003e The output voltage of the regulator is controlled with a 12-turn precision potentiometer. Turning the potentiometer clockwise increases the output voltage, and it can be measured using a multimeter.\u003c\/p\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\n\n\u003ctr\u003e\n\n \u003ctd style=\"max-width: 400px\"\u003e\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J8229.1200.png?7550a5dc934678c1b2209e082af975da\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id voltage settings for the fine-adjust step-up regulator s9v11macma and s9v11ma. data-picture-id=\"0J8229\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8229.400.jpg?7550a5dc934678c1b2209e082af975da\"\u003e\u003c\/a\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: 400px\"\u003e\u003cp\u003e Output voltage settings for the 2.5-9V Fine-Adjust Step-Up\/Step-Down Voltage Regulator S9V11MACMA and S9V11MA.\u003c\/p\u003e\u003c\/th\u003e\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\u003cp\u003e Please note that the output voltage can be set below 2.5 V at the low end of the potentiometer's range and above 9 V at the high end. While this is not likely to damage the regulator, it might not work reliably or its output could become unstable when the output voltage is not within the recommended 2.5 V to 9 V range.\u003c\/p\u003e\n\n\u003cp\u003e The output voltage can be up to 3% higher than normal when there is little or no load on the regulator. The output voltage can also drop depending on the current draw, especially when the regulator is boosting a lower voltage to a higher one (stepping up), although it should remain within 5% of the set voltage.\u003c\/p\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, this family of switching regulators typically has an efficiency of 85% to 95%. A power-saving feature maintains these high efficiencies even when the regulator current is very low.\u003c\/p\u003e\n\n\u003cdiv class=\"left\"\u003e\n\n\u003ctable class=\"picture_with_caption center\"\u003e\u003ctr\u003e\n\n\u003ctd\u003e\n\u003ca href=\"https:\/\/a.pololu-files.com\/picture\/0J8225.1200.png?358f6159674488334dd23ab8804a4777\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of step-up voltage regulator s9v11x with vout set to data-picture-id=\"0J8225\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8225.400.jpg?358f6159674488334dd23ab8804a4777\"\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 class=\"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\/0J8226.1200.png?37b0b9e818e56f9bc6c020e2107e7822\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of step-up voltage regulator s9v11x with vout set to data-picture-id=\"0J8226\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8226.400.jpg?37b0b9e818e56f9bc6c020e2107e7822\"\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 class=\"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\/0J8273.1200.png?345b6f9f9738494b609d7752a1fc6962\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of step-up voltage regulator s9v11x with vout set to data-picture-id=\"0J8273\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8273.400.jpg?345b6f9f9738494b609d7752a1fc6962\"\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 class=\"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\/0J8227.1200.png?b01e29a1db8072044a36d363e0abff64\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of step-up voltage regulator s9v11x with vout set to data-picture-id=\"0J8227\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8227.400.jpg?b01e29a1db8072044a36d363e0abff64\"\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 class=\"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\/0J8228.1200.png?34c54b99bf07ed6c55b2bc8f70a51a0d\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id efficiency of step-up voltage regulator s9v11x with vout set to data-picture-id=\"0J8228\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8228.400.jpg?34c54b99bf07ed6c55b2bc8f70a51a0d\"\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\"\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. Depending on the input and output voltage, these regulators can temporarily deliver over 2 A, though they will typically quickly overheat under such conditions and go into thermal shutdown.\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\/0J8224.1200.png?1b928f2d775c8cc364f2e364bcb8a99b\" class=\"noscript-fallback\"\u003e\u003cimg alt=\"\" class=\"zoomable\" data-gallery-pictures=\"[{\" id maximum continuous output current of step-up voltage regulator s9v11x data-picture-id=\"0J8224\" data-picture-longest_side=\"600\" src=\"https:\/\/a.pololu-files.com\/picture\/0J8224.500.jpg?1b928f2d775c8cc364f2e364bcb8a99b\"\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\u003cp\u003e\u003cins\u003e Note that the startup current for input voltages above the regulated output voltage is limited to approximately 700 mA \u003c\/ins\u003e, and currents in excess of this are only available after the output has finished stabilizing. For input voltages below the output voltage, the available start up current decreases linearly with the input voltage to approximately 0.3 A with an input of 3 V. Large capacitive loads will generally not pose a problem because they will gradually charge up even with the current limit active, so while they may increase the time it takes an S9V11x family regulator to start up, the regulator should still eventually stabilize. A purely resistive load, however, could prevent the regulator from ever reaching the desired output voltage. For example, if the output of the regulator is 5V and you put a 5 Ω resistor between VOUT and GND and then apply power to the regulator, the output voltage will never rise past 3.5 V, the voltage at which the current draw reaches the 700 mA limit. As such, this family of regulators is intended for applications like robotics, where any large loads are controllable and can be applied only after the regulator has finished starting up.\u003c\/p\u003e\n\n \u003ch3 class=\"clear\"\u003eLC Voltage Spikes\u003c\/h3\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 a regulator's maximum voltage, the regulator can be destroyed. If you are connecting more than about 9 V, using power leads more than a few inches long, or using a power supply with high inductance, we recommend soldering a 33 μF or larger electrolytic capacitor close to the regulator between VIN and GND. The capacitor should be rated for at least 20 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":47696731373913,"sku":"POL-2869","price":16.03,"currency_code":"EUR","in_stock":true},{"title":"1 day","offer_id":47886007599449,"sku":"POL-2869\/A","price":16.03,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/1009\/7753\/files\/0J8241.1200_a8da82ab-3387-496c-8479-f41204c77cae.jpg?v=1705456930","url":"https:\/\/robot-italy.com\/en\/products\/2869-2-5-9v-fine-adjust-step-up-step-down-voltage-regulator-s9v11ma","provider":"Robot Italy","version":"1.0","type":"link"}