{"title":"3.3V 250mA Linear Voltage Regulator - L4931-3.3 TO-92","handle":"3-3v-250ma-linear-voltage-regulator-l4931-3-3-to-92","url":"/products/3-3v-250ma-linear-voltage-regulator-l4931-3-3-to-92","description":"A low-dropout (LDO) 3.3 V linear voltage regulator based on the ST L4931 in a TO-92 package. With just 0.4 V dropout, it delivers a clean, regulated 3.3 V output from input voltages as low as 3.7 V — well suited for stepping down 5 V supplies or single-cell lithium batteries.\n\nBuilt-in current limiting and thermal shutdown make the L4931 robust and reliable. The low 1 mA quiescent current (rising to ~5 mA at full load) keeps it efficient for portable and battery-powered projects.\n\nKey Features\n\n\nVery Low Dropout – Only 0.4 V (vs 2 V for 78XX series regulators)\n\n250 mA Output – Up to 250 mA peak current\n\n3.3 V ±2% Regulation – Clean, stable output voltage\n\nWide Input Range – 3.7–20 V DC input\n\nBuilt-In Protection – Current limiting and thermal shutdown\n\nLow Quiescent Current – 1 mA typical, ideal for battery use\n\nTO-92 Package – Compact through-hole form factor\n\n\nSpecifications\n\n\nOutput Voltage – 3.3 V ±2%\n\nMax Output Current – 250 mA\n\nDropout Voltage – 0.4 V\n\nInput Voltage – 3.7–20 V\n\nQuiescent Current – 1 mA (up to 5 mA at full load)\n\nThermal Resistance – 200 °C/W junction-to-air (TO-92)\n\nMax Power Dissipation – ~0.6 W without heatsink\n\n\nIdeal For\n\nStepping 5 V supplies down to 3.3 V for sensors and modules\nPowering 3.3 V devices from lithium polymer/ion batteries\nBattery-powered and portable electronics\nBreadboard prototyping with 3.3 V logic\n\n\nPackage Contents\n\n1× L4931-3.3 Voltage Regulator (TO-92)\n\n\n\nNote: Requires at least 2.2 µF electrolytic capacitors on both input and output for stability (10 µF recommended). Power dissipation = (Vin − 3.3 V) × Iout — ensure this does not exceed 0.6 W without a heatsink.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":9184,"title":"Default Title","sku":"AF-2166","price":3.05,"on_sale":false,"in_stock":true,"available_quantity":15,"option1":"Default Title"}]}