{"product_id":"pololu-9v-1a-step-up-step-down-voltage-regulator-s8v9f9","title":"Pololu 9V 1A Step-Up\/Step-Down Voltage Regulator S8V9F9","description":"\u003cp\u003eThe \u003ca href=\"\/ru\/collections\/pololu\"\u003ePololu\u003c\/a\u003e S8V9Fx family of efficient switching regulators \u003cem\u003e(also called switched-mode power supplies (SMPS) or DC-to-DC converters)\u003c\/em\u003e convert both higher and lower input voltages to a regulated output voltage. They take input voltages from 1.4V to 16V and increase or decrease them as necessary, offering typical efficiencies of 80% to 90% and typical continuous output currents over 1 A for input voltages close to the output voltage. (\u003cstrong\u003eNote: The minimum start-up voltage is 2.7V\u003c\/strong\u003e; see the connections section for details.)\u003c\/p\u003e \u003cp\u003eThis particular model (S8V9\u003cstrong\u003eF9\u003c\/strong\u003e) takes an \u003cstrong\u003einput voltage of 1.4V to 16V\u003c\/strong\u003e \u003cem\u003e(2.7 V startup)\u003c\/em\u003e and offers a \u003cstrong\u003efixed 9V output\u003c\/strong\u003e with a \u003cstrong\u003etypical maximum output current of 1A\u003c\/strong\u003e.\u003c\/p\u003e \u003cp\u003eThe 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 \u003cp\u003eThe S8V9Fx regulators have under-voltage lockout and over-current 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 \u003cp\u003e\u003cstrong\u003eWarning: During normal operation, this product can get hot enough to burn you.\u003c\/strong\u003e Take care when handling this product or other components connected to it.\u003c\/p\u003e \u003ch2\u003eFeatures\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eInput voltage: \u003cstrong\u003e1.4V to 16V\u003c\/strong\u003e (Note: minimum \u003cstrong\u003estart-up voltage is 2.7V\u003c\/strong\u003e)\u003c\/li\u003e \u003cli\u003eOutput voltage:\u003cstrong\u003e 9V with 4% accuracy\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eTypical maximum continuous output current: \u003cstrong\u003e1A\u003c\/strong\u003e when the input voltage is close to the output voltage (see the maximum continuous output current graph below for current capabilities across the full input voltage range)\u003c\/li\u003e \u003cli\u003eTypical efficiency of \u003cstrong\u003e80% to 90%\u003c\/strong\u003e, depending on input voltage and load (see the efficiency graph below)\u003c\/li\u003e \u003cli\u003eUnder 3 mA typical no-load quiescent current (see the quiescent current graph below); can be reduced to 10 µA to 15 µA per volt on VIN by disabling the board\u003c\/li\u003e \u003cli\u003eSoft-start feature limits inrush current and gradually ramps output voltage\u003c\/li\u003e \u003cli\u003eOver-current protection and over-temperature shutoff\u003c\/li\u003e \u003cli\u003eInput under-voltage lockout\u003c\/li\u003e \u003cli\u003ePower-saving feature maintains high efficiency at low currents\u003c\/li\u003e \u003cli\u003eCompact size: 0.4″ × 0.65″ × 0.1″ (10.2 mm × 16.5 mm × 2.6 mm); see the \u003ca href=\"https:\/\/www.pololu.com\/file\/0J1987\/step-up-step-down-voltage-regulator-s8v9fx-dimensions.pdf\"\u003edimension diagram\u003c\/a\u003e for more information\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eSpecifications\u003c\/h2\u003e \u003ctable width=\"392\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd width=\"255\"\u003eMinimum operating voltage\u003c\/td\u003e \u003ctd width=\"137\"\u003e\u003cstrong\u003e1.4V\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaximum operating voltage\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003e16V\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eContinuous output current\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003e1A\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eOutput voltage\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003e9V\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eReverse voltage protection?\u003c\/td\u003e \u003ctd\u003eN\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaximum quiescent current\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003e6mA\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eOutput type\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003efixed 9V\u003c\/strong\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSize\u003c\/td\u003e \u003ctd\u003e0.4″ × 0.65″ × 0.1\"\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eWeight\u003c\/td\u003e \u003ctd\u003e0.8 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003ePCB dev codes\u003c\/td\u003e \u003ctd\u003ereg31a\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eOther PCB markings\u003c\/td\u003e \u003ctd\u003e0J14112\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eUsing the Regulator\u003c\/h2\u003e \u003ch3\u003eConnections\u003c\/h3\u003e \u003cp\u003eThe step-up\/step-down regulator has four main connections: the output voltage (VOUT), ground (GND), the input voltage (VIN), and an enable input (EN).\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/S8V9Fx_pinout.jpg?v=1712920384\" alt=\"\"\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eVOUT\u003c\/strong\u003e is the regulated output voltage. The regulator’s soft-start feature gradually ramps up the VOUT voltage on start-up to limit in-rush current draw.\u003c\/p\u003e \u003cp\u003eThe input voltage, \u003cstrong\u003eVIN\u003c\/strong\u003e, should be between 2.7 V and 16 V when the regulator is first powered. After the regulator is running, it can continue operating down to 1.4 V. Lower inputs can shut down the voltage regulator; \u003cstrong\u003ehigher inputs can destroy the regulator\u003c\/strong\u003e, so you should ensure that noise on your input is not excessive, and you should be wary of destructive LC spikes (see the LC voltage spike section below for more information).\u003c\/p\u003e \u003cp\u003eThe regulator, which is enabled by default, can be put into a low-power sleep state by bringing the \u003cstrong\u003eEN\u003c\/strong\u003e pin low (under 1 V). Leaving the pin disconnected or bringing the pin above 1.3 V will enable the regulator. The quiescent current draw in sleep mode is dominated by the current in the 100 kΩ pull-up resistor from ENABLE to VIN, which altogether will be between 10 µA and 15 µA per volt on VIN.\u003c\/p\u003e \u003ch3\u003eTypical efficiency\u003c\/h3\u003e \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.\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/S8V9F9_efficiency.jpg?v=1712922736\" alt=\"\"\u003e\u003c\/p\u003e \u003ch3\u003eMaximum continuous output current\u003c\/h3\u003e \u003cp\u003eThe maximum achievable output current of the regulator varies with the input voltage but also depends on other factors, including the ambient temperature, airflow, and heat sinking. The graph below shows the maximum output currents that the regulators in the S8V9Fx family can deliver continuously at room temperature in still air and without additional heat sinking.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWarning: During normal operation, this product can get hot enough to burn you.\u003c\/strong\u003e Take care when handling this product or other components connected to it.\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/S8V9Fx_max_cont_output_current.jpg?v=1712920384\" alt=\"\"\u003e\u003c\/p\u003e \u003ch3\u003eQuiescent current\u003c\/h3\u003e \u003cp\u003eThe quiescent current is the current the regulator uses just to power itself, and the graph below shows this 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 15 µA per volt on VIN.\u003c\/p\u003e \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/S8V9Fx_quiescent_current.jpg?v=1712920385\" alt=\"\"\u003e\u003c\/p\u003e \u003ch3\u003eLC Voltage Spikes\u003c\/h3\u003e \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 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 \u003cp\u003eMore 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 \u003ch2\u003eResources\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1987\/step-up-step-down-voltage-regulator-s8v9fx-dimensions.pdf\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1988\/step-up-step-down-voltage-regulator-s8v9fx.step\"\u003e3D Model\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1986\/reg31a-drill.dxf\"\u003eDrill Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003ePackage Contents\u003c\/h2\u003e \u003cp\u003eThe regulator is supplied with a 4×1 straight male header strip and a 4×1 right-angle male header strip.\u003c\/p\u003e \u003cp\u003eThe through-holes are arranged with a 0.1″ spacing along the edge of the board for compatibility with standard \u003ca href=\"\/ru\/collections\/solderless-breadboards\"\u003esolderless breadboard\u003c\/a\u003e, \u003ca href=\"\/ru\/collections\/prototyping-pcbs-and-perfboard\"\u003eperfboards\u003c\/a\u003e and connectors that use a 0.1″ grid. You can solder \u003ca href=\"\/ru\/products\/prototyping-wire-spool-set\"\u003ewires\u003c\/a\u003e directly to the board or solder in the included breakaway 4×1 straight male header strip or the 4×1 right-angle male header strip as desired.\u003c\/p\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":50847421792529,"sku":"POL-4968","price":7.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/pololu-9v-1a-step-up-step-down-voltage-regulator-s8v9f9-pololu-pol-4968-41919863881923.jpg?v=1735213101","url":"https:\/\/abcd3032.myshopify.com\/ru\/products\/pololu-9v-1a-step-up-step-down-voltage-regulator-s8v9f9","provider":"Tayyab Zak","version":"1.0","type":"link"}