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″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. 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.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, and a soft-start feature that reduces inrush current.
S**M
Cuts down on heat
Used these to replace some old 7805 regulators. As someone else said the voltage is not always perfect, but for most applications these should do the job. 7805 regulators generate a lot of heat as they are generally used in applications that provide 6-12V input. The extra voltage is converted into heat. These small switchers run very cool so they can be used without a fan.
D**R
Works OK. The output voltage is a bit low.
I used this to modify a MeinEnigma kit. It works ok for my application. However, the output voltage on mine is more like 4.8 volts rather than 5. This is while running from 9 or 12 volts.
B**$
Rock Solid
Can't go wrong with Pololu. Does exactly as it says and does it reliably. What more could you want?
M**N
awesome :)
this little guy is about the size of a dime (if a dime wasn't cut down to a circle)I haven't put it against my multimeter, but it works great for flightcontroller + vtx + camera + HD cam. I've integrated it into the lipo connector lead with some heat-shrink. very nice looking quality
Trustpilot
3 weeks ago
2 weeks ago