This is a placeholder topic for “Pololu 5V, 1A Step-Down Voltage Regulator D24V10F5” comments.
The compact (0.5″ × 0.7″) D24V10F5 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 5 V while allowing for a maximum output current of 1 A.
Read moreI’m looking for a 12v to 5v Voltage regulator which I can put inside the walls of a doll house. The catch is I don’t Fire and Rescue NSW pushing for legislation restricting my movements to within a kilometer of a local fire station so I need to be temperature safe.
The space I have to work with is enclosed with the rest of the electronics and I won’t have a fan or much room for a heat sink. I’m not game to use an L7805 which by my calculations will produce ~+70c. ((12v-5v) * 0.2a = 1.4w * 50(Rthj-amb))
Plan A is to throw 9v into the house and step up to 12v on one circuit and down to 5v on another.
Plan B is the simple option which is to buy a different regulator that will be a little more chill.
This looks like it’ll work for me but I don’t see any equations or charts that talk about temperature in the datasheet. The comments under the components say it can get “hot enough to burn” so I know it produces something I just need the equation to find out how much.
Thanks in advance.
Hey @Pixmusix,
This Step-Down Regulator seems to run cool enough from my testing.
I tried using it to power a Pi 3B (input of 5V 2.5A) with a voltage input of 12V and was unable to get the temp over 45°C when sitting open on a bench. The ambient temp here is around 22°C so hopefully that gives you some idea of how it would perform.
I hope this information helps you anyway!
Thanks Samuel. That’s really helpful research. I’ll place my order soon.
Hi @Pixmusix
No worries, keep us in the loop with how the project goes!
Hi.
Just getting to wiring this up.
From the paragraph titled connections on your website. I read:
The “power good” indicator, PG, is an open-drain output that drives low when the regulator’s output voltage falls below 80% or rises above 120% […] An external pull-up resistor is generally required to use this pin.
My takeaway from this paragraph is that the pin is optional but may also warn me if I’m using it wrong. I sure do like it when my devices warn me that something is wrong. What are some ways I could use it to protect myself from fires or damage to my components? Am I meant to wire this to a quick reset fuse or something or is the idea to just wire a small led to it for some visual feedback.
Hey @Pixmusix
It would depend on your needs, you could use it with an LED like you mentioned to act as a visual output, you could also hook it up to something like a relay/transistor to turn off a circuit if the voltage is too low.
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