# 5V 500mA step-down regulator D24V5F5 Manufacturer: Pololu | MPN: 2843 | Category: power-reg Canonical: https://partsgraph.ai/catalog/parts/pololu-5v-reg-d24v5f5 Image: https://partsgraph.ai/catalog/img/pololu-5v-reg-d24v5f5.jpg (photo: Pololu; sha256 42b73c5a38da) ## Attributes (each with provenance) - **Output voltage**: 5 V - source: https://www.pololu.com/product/2843 - quote: "Pololu 5V, 500mA Step-Down Voltage Regulator D24V5F5 Voltage Regulato" - **Output current**: 500 mA - source: https://www.pololu.com/product/2843 - quote: "Pololu 5V, 500mA Step-Down Voltage Regulator D24V5F5 Voltage Regulators and" - **Input voltage**: 5.1 to 36 V - source: https://www.pololu.com/product/2843 - quote: "pical max output current 1 Input voltage range 2 5 V 500 mA 5.1 V - 36 V Note 1: Actual achievable maximum continuous output current" - **No-load quiescent current, typ**: 200 μA - source: https://www.pololu.com/product/2843 - quote: "% 500 kHz switching frequency (when not in power-save mode) 200 μA typical no-load quiescent current Over-current and short-ci" - **Switching frequency**: 500 kHz - source: https://www.pololu.com/product/2843 - quote: "mum output current: 500 mA Typical efficiency of 80% to 93% 500 kHz switching frequency (when not in power-save mode) 200 μA ty" - **Typical efficiency**: 80 to 93 % - source: https://www.pololu.com/product/2843 - quote: "DC-to-DC converters) and have a typical efficiency between 80% to 93%, which is much more efficient than linear voltage regulator" - **Output voltage accuracy**: 4 % - source: https://www.pololu.com/product/2843 - quote: "12 V, or 15 V output (depending on regulator version) with 4% accuracy Maximum output current: 500 mA Typical efficiency" - **Board size**: 13 mm x 10 mm x 3 mm - source: https://www.pololu.com/product/2843 - quote: "n, over-temperature shutoff Small size: 0.5″ x 0.4″ x 0.1″ (13 mm x 10 mm x 3 mm) Using the regulator Connections The buck regulator has fou" - **Over-current / thermal protection**: yes - source: https://www.pololu.com/product/2843 - quote: "ight versions of the D24V5Fx family. The regulators feature short-circuit/over-current protection, and thermal shutdown helps prevent" - **Reverse-voltage protection**: no - source: https://www.pololu.com/product/2843 - quote: "shutdown helps prevent damage from overheating. The boards do not have reverse-voltage protection. If you need more output current, consider the very similar" - **Shutdown (SHDN) pin**: yes - source: https://www.pololu.com/product/2843 - quote: "ections The buck regulator has four connections: shutdown ( SHDN ), input voltage (VIN), ground (GND), and output voltage (V" - **Topology**: buck (step-down) - source: https://www.pololu.com/product/2843 - quote: "voltage regulator in TO-220 package. The D24V5Fx family of buck (step-down) voltage regulators generates lower output voltages from inp" - **VIN applied range, family (before dropout limit)**: 3 to 36 V - source: https://www.pololu.com/product/2843 - quote: "near regulator in a TO-220 package. Features Input voltage: 3 V to 36 V for output voltages of 1.8 V and 2.5 V [ output voltage + d" - **SHDN low threshold (under)**: 0.4 V - source: https://www.pololu.com/product/2843 - quote: "utput voltage (VOUT). The SHDN pin can be driven low (under 0.4 V) to turn off the output and put the board into a low-power" - **SHDN pull-up resistor to VIN**: 100 kΩ - source: https://www.pololu.com/product/2843 - quote: "output and put the board into a low-power state. There is a 100 kΩ pull-up resistor between the SHDN pin and VIN, so if you wa" - **Draw while SHDN held low @ 36 V in (approx)**: 360 μA - source: https://www.pololu.com/product/2843 - quote: "tional to the input voltage. (At 36 V in it will draw about 360 μA.) The input voltage, VIN, powers the regulator. Voltages be" - **Power-save mode at light loads**: yes - source: https://www.pololu.com/product/2843 - quote: "input and output voltage is large. These regulators have a power-save mode that activates at light loads and a low quiescent (no load)" - **Connections**: shutdown ( SHDN ), input voltage (VIN), ground (GND), and output voltage (VOUT) - source: https://www.pololu.com/product/2843 - quote: "ulator Connections The buck regulator has four connections: shutdown ( SHDN ), input voltage (VIN), ground (GND), and output voltage (VOUT). The SHDN pin can be driven low (under 0.4 V) to turn off t" - **Pin spacing**: 0.1 ″ - source: https://www.pololu.com/product/2843 - quote: "labeled on the back side of the PCB and are arranged with a 0.1″ spacing along the edge of the board for compatibility with" - **Male header strips included (straight + right-angle)**: yes - source: https://www.pololu.com/product/2843 - quote: "4x1 straight male header strip or the 4x1 right-angle male header strip that is included. Typical efficiency and output current The efficiency of a" - **Rec. input capacitor for >20 V inputs (min)**: 33 μF - source: https://www.pololu.com/product/2843 - quote: "ads or supply has high inductance, we recommend soldering a 33 μF or larger electrolytic capacitor close to the regulator bet" - **Rec. input capacitor voltage rating (min)**: 50 V - source: https://www.pololu.com/product/2843 - quote: "een VIN and GND. The capacitor should be rated for at least 50 V. More information about LC spikes can be found in our appli" ## Vendors - Pololu: https://www.pololu.com/product/2843 (~USD 8.95, indicative as of 2026-08-18) ## Datasheets - Regulator product page: https://www.pololu.com/product/2843 Used in builds: 2wd-robot, plant-waterer (roles: regulator) Machine feed of the whole catalogue: https://partsgraph.ai/catalog/feed.json