SKU: 41207143211

Pololu 5V 2.5A Step-Down Voltage Regulator

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Description

Pololu 5V 2.5A Step-Down Voltage RegulatorThe D24V25Fx family of step down voltage regulators generates lower output voltages from input voltages as high as 38 V. They are switching regulators (also called switched mode power supplies (SMPS) or DC to DC converters) with typical efficiencies between 85% and 95%, which is much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large. The available output current is a function of

The D24V25Fx family of step-down voltage regulators generates lower output voltages from input voltages as high as 38 V. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) with typical efficiencies between 85% and 95%, which is much more efficient than linear voltage regulators, especially when the difference between the input and output voltage is large. The available output current is a function of the input voltage and efficiency (see the Typical Efficiency and Output Current section below), but the output current can typically be as high as 2.5 A.

At light loads, the switching frequency automatically changes to maintain high efficiencies. These regulators have a typical quiescent (no load) current draw of less than 1 mA, and the ENABLE pin can be used to put the boards in a low-power state that reduces the quiescent current to approximately 10 µA to 20 µA per volt on VIN.

The modules have built-in reverse-voltage protection, short-circuit protection, a thermal shutdown feature that helps prevent damage from overheating, a soft-start feature that reduces inrush current, and an under-voltage lockout.

Features

  • Input voltage:
    • 4.5 V to 38 V for the version that outputs 3.3 V
    • [output voltage + dropout voltage] to 38 V for output voltages of 5 V and higher (see below for more information on dropout voltage)
  • Fixed 3.3 V, 5 V, 6 V, 7.5 V, or 9 V output (depending on regulator version) 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
  • Typical no-load quiescent current under 1 mA; can be reduced to 10 µA to 20 µA per volt on VIN by disabling the board
  • Compact size: 0.7″ × 0.7″ × 0.35″ (17.8 mm × 17.8 mm × 8.8 mm)
  • Two 0.086″ mounting holes for #2 or M2 screws

Connections

The input voltage, VIN, powers the regulator. Voltages between 4.5 V and 38 V can be applied to VIN, but for versions of the regulator that have an output voltage higher than 4.5 V, the effective lower limit of VIN is VOUT plus the regulator’s dropout voltage, which varies approximately linearly with the load (see below for graphs of dropout voltages as a function of the load).

The output voltage, VOUT, is fixed and depends on the regulator version: the D24V25F3 version outputs 3.3 V, the D24V25F5 version outputs 5 V, the D24V25F6 version outputs 6 V, the D24V25F7 version outputs 7.5 V, and the D24V5F9 version outputs 9 V.

The regulator is enabled by default: a 100 kΩ pull-up resistor on the board connects the ENABLE pin to reverse-protected VIN. The ENABLE pin can be driven low (under 0.6 V) to put the board into a low-power state. The quiescent current draw in this sleep mode is dominated by the current in the pull-up resistor from ENABLE to VIN and by the reverse-voltage protection circuit, which will draw between 10 µA and 20 µA per volt on VIN when ENABLE is held low. If you do not need this feature, you should leave the ENABLE pin disconnected.

Shipping Notes
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SKU: 41207143211

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★★★★★ 5
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07/17/2025: This doggy toy was destroyed within 2 hours of its arrival. In my opinion, it was not at all worth the cost. (1 star) Update (07/19/2025): I have contacted the manufacturer and they said they will send out a new replacement toy. As of now, I have revised the review to 2 stars for the excellent and efficient customer service pending arrival of said replacement. Will update again soon. (2 stars) Update (07/23/2025): The replacements have arrived! My dog loves the new plushie sloth and so far it is in tact. It doesn't have stuffing in the body as far as I can tell, so little to no clean up hopefully. They also sent her a spiked squeaky ball and she's getting used to it. This company has some of the best customer service and support that I've experienced. (5 stars)
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Reviewed in the United States on July 18, 2025
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Travis H
Massapequa, US
★★★★★ 5
Cute, Squeaky, and So Much Fun — Perfect Little Loofa Toy
Style: Plush Surprise Color, Size: 6"
The Multipet Original Loofa Dog plush (6”) has been a huge hit. It’s super cute in person, and the random color is a fun surprise. For a plush toy, the durability has been better than expected. It’s held up well to regular play, and the seams have stayed intact. Chewability is solid for light-to-moderate chewers—my dog loves chewing and carrying it around, but it’s still a plush toy, so it’s not meant for aggressive shredders. The squeak is loud enough to keep my dog interested without being obnoxious, and it still squeaks consistently. It’s also really fun for dogs because it has a bit of bounce when tossed, so it’s great for indoor fetch and pouncing. Soft, adorable, and entertaining—easy 5 stars.
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Reviewed in the United States on January 7, 2026
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TB
Massapequa, US
★★★★★ 4
My dog’s favorite soft toy!
Style: Plush Surprise Color, Size: 12", Style: Plush Surprise Color, Size: 12"
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Reviewed in the United States on April 26, 2026
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D.G.
Lowell, US
★★★★★ 5
Puppy and price approved!
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J. G.
Boise, US
★★★★★ 3
Lab tested. Lab approved.
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My two Labradors make quick work of these. They love them. But Not very durable. Stuffing everywhere.
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