Timeline for Choosing capacitors for a linear voltage regulator
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 13, 2017 at 12:32 | history | edited | CommunityBot |
replaced http://electronics.stackexchange.com/ with https://electronics.stackexchange.com/
|
|
| Feb 25, 2017 at 20:19 | answer | added | bobflux | timeline score: 0 | |
| Sep 21, 2016 at 2:55 | comment | added | Nateowami | @mkeith Hmm... I estimated it but it looks like it's going to be higher than I was thinking. It should be 170mA for "typical use," but in reality it should be less most of the time. 170mA*(9v-3.3v)=0.969 W. That's pretty high. The datasheet has graphs for maximum power dissipation at different ambient temperatures, but doesn't list the TO-220 package. My 5v source would be from an Arduino, which can only provide 200mA (I fear I may spike over that limit). But maybe I should run the whole thing from a 5v power supply and bypass the Arduino's 5v regulator. I'm trying to power an ESP8266. | |
| Sep 21, 2016 at 1:21 | comment | added | Nateowami | @PlasmaHH Yeah, that was poorly worded on my part. Finding the datasheet can be difficult if the seller doesn't list it and there's no part number. Or will good capacitors always have a part number you can look up? | |
| Sep 21, 2016 at 1:17 | vote | accept | Nateowami | ||
| Sep 20, 2016 at 15:56 | answer | added | Olin Lathrop | timeline score: 5 | |
| Sep 20, 2016 at 15:52 | comment | added | user57037 | Yes, you can just add a series resistor with a ceramic cap. Did you calculate the power dissipation? It is (Vin-Vout) * Iload. With 9V in, the power dissipation may be pretty high. You might need to use a DC-DC converter. | |
| Sep 20, 2016 at 15:52 | answer | added | Spehro 'speff' Pefhany | timeline score: 8 | |
| Sep 20, 2016 at 15:41 | comment | added | Wesley Lee | If you prefer PTH, why not just go with electrolytic then? Your low ESR caps should be close to your target circuitry, by then traces/leads will probably be long enough so that they won't de-stabilize the regulator. | |
| Sep 20, 2016 at 15:38 | comment | added | PlasmaHH | "because they're such common components" no, you don't get a datasheet for them because they are cheap common crap. For every reputable cap, there is a more or less useful datasheet | |
| Sep 20, 2016 at 15:35 | history | asked | Nateowami | CC BY-SA 3.0 |