{"product_id":"pololu-3-3v-500ma-step-down-voltage-regulator","title":"Pololu 3.3V, 500mA Step-Down Voltage Regulator","description":"\u003cp\u003e\u003cspan\u003eThe D24V5Fx family of buck (step-down) voltage regulators generates lower output voltages from input voltages as high as 36 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 93%, which is much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large. These regulators have a power-save mode that activates at light loads and a low quiescent (no load) current draw, which make them well suited for low-power applications that are run from a battery.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003eThe different versions of this regulator all look very similar, so the bottom silkscreen includes a blank space where you can add your own distinguishing marks or labels. This product page applies to all eight versions of the D24V5Fx family.\u003c\/p\u003e\r\n\u003cp\u003eThe 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\r\n\u003ch2\u003eFeatures\u003c\/h2\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eInput voltage:\u003c\/li\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e3 V to 36 V for output voltages of 1.8 V and 2.5 V\u003c\/li\u003e\r\n\u003cli\u003e[output voltage + dropout voltage] to 36 V for output voltages of 3.3 V and higher (see below for more information on dropout voltage)\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cli\u003eFixed 1.8 V, 2.5 V, 3.3 V, 5 V, 6 V, 9 V, 12 V, or 15 V output (depending on regulator version) with 4% accuracy\u003c\/li\u003e\r\n\u003cli\u003eMaximum output current: 500 mA\u003c\/li\u003e\r\n\u003cli\u003eTypical efficiency of 80% to 93%\u003c\/li\u003e\r\n\u003cli\u003e500 kHz switching frequency (when not in power-save mode)\u003c\/li\u003e\r\n\u003cli\u003e200 μA typical no-load quiescent current\u003c\/li\u003e\r\n\u003cli\u003eIntegrated over-temperature and over-current shutoff\u003c\/li\u003e\r\n\u003cli\u003eSmall size: 0.5″ × 0.4″ × 0.1″ (13 mm × 10 mm × 3 mm)\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003ch2\u003eUsing the regulator\u003c\/h2\u003e\r\n\u003cp\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003eThe buck regulator has four connections: shutdown (\u003cspan\u003eSHDN\u003c\/span\u003e), input voltage (VIN), ground (GND), and output voltage (VOUT).\u003c\/p\u003e\r\n\u003cp\u003eThe \u003cspan\u003eSHDN\u003c\/span\u003e pin can be driven low (under 0.4 V) to turn off the output and put the board into a low-power state. There is a 100 kΩ pull-up resistor between the \u003cspan\u003eSHDN\u003c\/span\u003e pin and VIN, so if you want to leave the board permanently enabled, the \u003cspan\u003eSHDN\u003c\/span\u003e pin can be left disconnected. While the \u003cspan\u003eSHDN\u003c\/span\u003e pin is being driven low, the current draw of the regulator is dominated by the current through the pull-up resistor and will be proportional to the input voltage. (At 36 V in it will draw about 360 μA.)\u003c\/p\u003e\r\n\u003cp\u003eThe input voltage, VIN, powers the regulator. Voltages between 3 V and 36 V can be applied to VIN, but for versions of the regulator that have an output voltage higher than 3 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 graphs of dropout voltages as a function of the load). Additionally, please be wary of destructive LC spikes (see below for more information).\u003c\/p\u003e\r\n\u003cp\u003eThe output voltage, VOUT, is fixed and depends on the regulator version: the D24V5F1 version outputs 1.5 V, D24V5F2 version outputs 2.5 V, the D24V5F3 version outputs 3.3 V, the D24V5F5 version outputs 5 V, the D24V5F6 version outputs 6 V, the D24V5F9 version outputs 9 V, the D24V5F12 version outputs 12 V, and the D24V5F15 version outputs 15V.\u003c\/p\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":14778929184831,"sku":"6985","price":3.75,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0084\/8301\/2671\/products\/1_45.jpg?v=1570043992","url":"https:\/\/dronecosmo.myshopify.com\/products\/pololu-3-3v-500ma-step-down-voltage-regulator","provider":"DroneCosmo","version":"1.0","type":"link"}