Data Sheet

RB-Pol-267

5V, 2.5A Step-Down Voltage Regulator D24V25F5

This step-down (buck) regulator generates a fixed 5 V output from input voltages up to 38 V. It is a

switching regulator (also called a switched-mode power supply (SMPS) or DC-to-DC converter) and

has a typical efficiency between 85% to 95%. The available output current is a function of the input

voltage and efficiency (see the Typical Efficiency and Output Current section below), but the input

current can typically be as high as 2.5 A. The regulator has a typical quiescent current draw of less than

1 mA, and the ENABLE pin can be used to put the board in a low-power state that reduces the

quiescent current to approximately 10 µA to 20 µA per volt on VIN. This regulator has built-in reverse-

voltage protection, short-circuit protection, thermal shutdown, a soft-start feature that reduces inrush

current, and an under-voltage lockout.

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: 2.5 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" x 0.7" x 0.35" (17.8 mm × 17.8 mm × 8.8 mm)

• Two 0.086" mounting holes for #2 or M2 screws

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RB-Pol-267 5V, 2.5A Step-Down Voltage Regulator D24V25F5 This step-down (buck) regulator generates a fixed 5 V output from input voltages up to 38 V. It is a switching regulator (also called a switched-mode power supply (SMPS) or DC-to-DC converter) and has a typical efficiency between 85% to 95%. The available output current is a function of the input voltage and efficiency (see the Typical Efficiency and Output Current section below), but the input current can typically be as high as 2.5 A.