{"title":"Pololu 5V, 300mA Step-Down Voltage Regulator D24V3F5","handle":"pololu-5v-300ma-step-down-voltage-regulator-d24v3f5","url":"/products/pololu-5v-300ma-step-down-voltage-regulator-d24v3f5","description":"The Pololu D24V3F5 is a compact buck (step-down) switching voltage regulator that converts input voltages up to 42 V down to a fixed 5 V output. With a typical efficiency of 80–90%, it significantly outperforms linear regulators like the 7805, especially when there is a large difference between input and output voltage.\n\nThe board features built-in short-circuit protection and thermal shutdown. Pins are spaced on a standard 0.1″ (2.54 mm) grid for easy use with breadboards and prototyping headers — a straight and right-angle header strip are both included.\n\nKey Features\n\n\nFixed 5 V Output – 4% accuracy, 300 mA maximum output current\n\nWide Input Range – Accepts up to 42 V input (must exceed output voltage plus dropout)\n\nHigh Efficiency – 80–90% typical, far better than linear regulators\n\n1.25 MHz Switching Frequency – Enables small external components\n\nLow Quiescent Current – 2 mA typical; 20 µA in shutdown mode\n\nBuilt-In Protection – Over-temperature and over-current shutoff\n\nShutdown Pin – Drive SHDN low (under 0.3 V) to enter low-power mode, or tie to VIN to keep the regulator permanently enabled\n\nCompact Size – 13 × 10 × 3 mm\n\n\n\nWarning: This board does not have reverse-voltage protection. Do not leave the SHDN pin disconnected — this can result in unpredictable behaviour. Connect it to VIN if the shutdown feature is not needed.\n\n\nConnections\n\n\nSHDN – Shutdown control (active low). Drive low to disable output, high (>2.3 V) or tie to VIN to enable\n\nVIN – Input voltage (up to 42 V maximum)\n\nGND – Ground\n\nVOUT – Regulated 5 V output\n\n\n\nNote: When connecting input voltages above 20 V or using long power leads with high inductance, solder a 33 µF or larger electrolytic capacitor (rated 50 V+) close to the regulator between VIN and GND to suppress destructive LC voltage spikes. See Pololu's application note on LC voltage spikes for details.\n\n\nIdeal For\n\nBattery-powered projects needing a stable 5 V supply\nReplacing inefficient 7805-style linear regulators\nRobotics, drones, and portable electronics with higher input voltages\n\n\nPackage Contents\n\n1× Pololu D24V3F5 Step-Down Voltage Regulator\n1× 4-pin straight male header strip\n1× 4-pin right-angle male header strip\n\n\nResources\n\nUnderstanding Destructive LC Voltage Spikes (Pololu)\n","vendor":"Pololu","product_type":"physical","in_stock":false,"options":[],"variants":[{"id":11724,"title":"Default Title","sku":"PL-2098","price":7.25,"compare_at_price":0.0,"on_sale":false,"in_stock":false,"available_quantity":0,"option1":"Default Title"}]}