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.

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SKU: 41207143211

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4.5 ★★★★★
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Paige
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★★★★★ 5
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Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1), Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1)
This is my dog’s favorite toy! She carries it around everywhere and loves the squeaker. It’s a great size and keeps her entertained for a while. Holds up pretty well too, especially for how much she plays with it.
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Reviewed in the United States on April 25, 2026
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Jennifer Kalstrom
Chelsea, US
★★★★★ 5
"Gator" under supervision for husky pup is loads of fun for her.
Color: Squeaker Matz Gator, Size: X Large (Pack of 1), Color: Squeaker Matz Gator, Size: X Large (Pack of 1)
Fun loving hyper 7 month old female husky whose an aggressive chewer loves her "Gator". She loves the squeakers, does chew on any & all parts of her toy as she like many textures from soft/fuzzy to hard. 1st Gator we got her lasted a few months. She did chew threw a good amount, it did get dirty & most of the 16 squeakers were missing but I saved like 5 of them & sowed them back in. Once she started chewing thru the head & into the stuffing we ordered a replacement & she's so happy. I have 1 picture of the Gator though it might not look like it's done it was. Zero squeakers remaining, head has 1/2 stuffing removed, torn stitches but not enough where the body could come apart. She managed to eat the stuffing but she was not hurtful & we were able to stop her each time. I recommend "Gator" w/ supervision if you have an aggressive chewing pup. It's durable enough for some tugging & "fetch". It advertised "encourages digging" @ the squeaker but she didn't. She tugged, chomped' "fetch" & whipped the toy w her head but had a blast every time. She actively searches for Gator when she wants to play w/ her toys. 16 squeakers.
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Reviewed in the United States on May 12, 2021
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Verified Purchase
Martha Gonzalez
Boise, US
★★★★★ 1
Toy disintegrates - a hazard for dogs
Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1), Color: Squeaker Matz Gator, Size: 2X-Large (Pack of 1)
I buy these types of toys for my dogs. They rip them apart and pop the squeakers, having a great time. This is the third time over the past 2 or 3 years I've bought this particular toy. The quality has fallen off a cliff. Whenever my dogs shake it, flecks of the material fly off. These small pieces are very difficult to vacuum and, more seriously, get caught in my dog's teeth and throat. This never happened before, and they actually still have an old version that I occasionally resew with replacement squeakers. If you've bought this toy in the past couple of years, know that this is not the same product.
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Reviewed in the United States on May 3, 2026
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Wanda
San Leandro, US
★★★★★ 5
Dog toy
These worked really good - they are made of a good quality denim like material seems dirty so far have only had them about a month.
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Reviewed in the United States on December 3, 2025
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DocMom2Four
Lake Worth, US
★★★★★ 5
Very Sturdy and Safe for Tough Chewers
Style: Muskie
We already had a smaller fish toy from this brand, and after 4 months it is, amazingly, still intact. So we ordered this larger one as a holiday present. Our dog usually can rip apart any toy, even "tough chewer" toys, within a few minutes or hours, so this brand is a definite keeper for us. We have also had their giraffe toy for 4 months with no rips or holes. The best part is that there is no stuffing to worry about. Inside the toy is a rope toy instead of stuffing, so it is so much less risky. Highly recommended.
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Reviewed in the United States on December 30, 2024

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