Pololu 5V, 5A Step-Down Voltage Regulator D24V50F5

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 5 V. The board measures only 0.7? × 0.8?, but it allows a typical continuous output current of up to 5 A. Typical efficiencies of 85% to 95% make this regulator well suited for high-power applications like powering motors or servos. High efficiencies are maintained at light loads by dynamically changing the switching frequency, and an optional shutdown pin enables a low-power state with a current draw of a few hundred microamps.

Features

• Input voltage: 6 V to 38 V (see below for more details on the regulator’s dropout voltage, which affects the low end of the operating range)
• Fixed 5 V output (with 4% accuracy)
• Typical maximum continuous output current: 5 A
• Integrated reverse-voltage protection, over-current protection, over-temperature shutoff, soft-start, and under-voltage lockout
• Typical efficiency of 85% to 95%, depending on input voltage and load; the switching frequency automatically changes at light loads to maintain high efficiencies
• 700 µA typical no-load quiescent current; can be reduced to 10 µA to 20 µA per volt on VIN by disabling the board
• Compact size: 0.7? × 0.8? × 0.35? (17.8 mm × 20.3 mm × 8.8 mm)
• Two 0.086? mounting holes for #2 or M2 screws