Pololu D42V55F24 24V 4A Step-Down Voltage Regulator

The Pololu D42V55F24 is a compact synchronous step-down, or buck, switching regulator for converting a higher DC input voltage down to a regulated 24 V output. It is designed for efficient power conversion in applications where a linear regulator would waste too much energy as heat.

The board accepts input voltages from 24 V up to 60 V and can deliver up to 4 A, with typical continuous output current depending on input voltage and thermal conditions. Efficiency is around 90% to 95%, varying with load, input and output voltage.

Protection and control features include input reverse-voltage protection, over-current protection, thermal shutdown and soft-start to limit inrush current. The module is prototyping-friendly, with duplicated power rails, six 0.1″ grid-compatible connections and three mounting holes for #2 or M2 screws.

Features:

• Regulator type: Compact synchronous step-down (buck) switching regulator
• Efficient conversion: Reduces a higher input voltage to a lower output voltage while increasing available current
• Input protection: Includes input reverse-voltage protection
• Over-current protection: Includes over-current protection
• Thermal protection: Includes thermal shutdown
• Soft-start: Includes soft-start to limit inrush current
• Mounting: Includes three mounting holes for #2 or M2 screws
• Prototyping connections: Includes six 0.1″ grid-compatible connections (VIN, VOUT, GND, VRP, EN, PG)
• Power rails: Includes duplicated power rails for easy prototyping

Specifications:

• Model: Pololu D42V55F24
• Input voltage: 24 V up to 60 V
• Output voltage: 24 V
• Output current: up to 4 A
• Typical continuous output current: 2.5 A to 5 A, depending on input voltage and thermal conditions
• Efficiency: around 90% to 95%, varying with load, input, and output voltage
• Switching frequency: approximately a 400 kHz switching frequency under heavy loads
• Quiescent current: very low quiescent current at no load
• Dimensions: 1″ × 1″ × ~0.355″ (25.4 × 25.4 × 9 mm)
• Mounting holes: three mounting holes for #2 or M2 screws
• Connections: six 0.1″ grid-compatible connections (VIN, VOUT, GND, VRP, EN, PG)
• Power rails: duplicated power rails for easy prototyping

Use this regulator for 24 V rails in robotics, automation, LED systems and other DC power projects where efficient conversion from a higher supply is needed.