The Pololu D24V50F5 is a high-efficiency step-down (buck) voltage regulator that converts input voltages up to 38V down to a fixed 5V output. With a typical maximum output current of 5A and efficiency between 85% and 95%, it far outperforms linear regulators — especially when the input-to-output voltage difference is large.

At light loads, the switching frequency automatically adjusts to maintain high efficiency, with a typical no-load quiescent current under 1 mA. The ENABLE pin can further reduce quiescent current to approximately 10–20 µA per volt on VIN for low-power sleep states.

Key Features

• Output Voltage – Fixed 5V with 4% accuracy
• Input Voltage Range – (5V + dropout voltage) to 38V
• Maximum Output Current – Typically 5A (varies with input voltage and conditions)
• Efficiency – 85% to 95% typical, with automatic frequency adjustment at light loads
• Switching Frequency – Approximately 600 kHz (drops at light loads for efficiency)
• Quiescent Current – Under 1 mA (no load); reducible via ENABLE pin
• Built-in Protection – Reverse-voltage, over-current, thermal shutdown, soft-start, and under-voltage lockout
• ENABLE Pin – Drive low (under 0.6V) to enter low-power sleep state
• Mounting – Two 0.086″ holes for #2 or M2 screws
• Pin Spacing – 0.1″ (2.54mm), compatible with breadboards and standard connectors
• Dimensions – 17.8 × 20.3 × 8.8mm (0.7″ × 0.8″ × 0.35″)

Connections

• VIN – Input voltage (4.5V to 38V; effective minimum is VOUT + dropout voltage)
• VOUT – Regulated 5V output
• GND – Ground (2 pins)
• EN – Enable pin (pulled high by default via 100 kΩ resistor; leave disconnected if not needed)

Ideal For

• Battery-powered projects requiring regulated 5V
• Robotics and motor driver power supplies
• Raspberry Pi and single-board computer power from higher-voltage sources
• Any application needing efficient voltage step-down

Package Contents

• 1× D24V50F5 step-down voltage regulator
• 1× 5-pin straight male header strip
• 1× 5-pin right-angle male header strip