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Simple way to boost voltage ?
Hi, I need a low part count and low cost way to boost a low voltage supply. I currently have a large buck powering the device core power between .65-.8v. I need a way to take this core voltage and boost it to .8-.9v @ ~ 1 A. Most boost converters dont work in these...
So I'm making a PCB that has an M.2 PCIE X4 connector (M key version). I have the schematic ready to go, but have no idea how to make an accurate outline for the actual connector and pads. Is there a M.2 library file that already has the connector created that I can use to edit?
(worst case I...
Currently have a relay thats rated for 15 amps for a 5amp AC PSU power source (high capacitive inrush current). I have it wired so that its in the NC state, and when the relay is powered it cuts power to the PSU (reason I want it like this is if the relay control logic fails on boot/power on...
So did some more reverse engineering, I'm pretty sure its a SOT-323 PNP transistor. From a live board the bottom right pin is connected to 12v VCC, top pin is connected to 12V drive pin on the socket that drives a fan. And bottom left pin was at around 5v.
So looks like bottom left pin is the...
yea i found that part with the 1Y marking...but I'm hopeing I can get a more exact part with the ADZV marking...can anyone identify what size packaging that is exactly? Looks like there are two transistor sizes on that bored the one in question and the smaller 1AM> transistors.
Im trying to repair an identical board, and need to find the components below the 4 pin socket connector (which I'm also trying to find the exact part number for if anyone can recognize it). More importantly I need to figure out what the 3 Pin IC below the socket is, which looks like some sort...
Im trying to figure out the effective capacitance and ESR of a cap bank for a buck converter so I can optimize its compensation network.
I have 3x 50uF ceramics with 2.2 milliOhm ESR @250khz, and 1x 420 uF poly cap with 7mOhm ESR (these values are derated).
What would be the equivalent...
Yea I'm adding a 470uF poly cap (and taking one out of the four 100uf ceramics out), and adding 8x10uF caps around the input pins of the ASIC.
Hopefully that will improve things.
So I have a 5v->1v power stage built around the LM27403 for powering an ASIC, and it works well for lower operating frequencies in the rang of 100-250mhz, but things get unstable around 300mhz. Im trying to figure out how the compensation design works for this buck and how tuning it can help...
+/-100mv from 900mv is completely fine. Which is why Im even considering this. I guess using a pot to figure right resistance then just using that fixed resistance for final design could work.
Yea I realized this after looking at a few datasheets. This one is almost there if I connect both of them in series: **broken link removed**
Gets me a Vf of .6-.9 between .5-5ma. Unfortunately even this range is too great. I guess regulating with diodes won't work after all...The only way it...
Wouldn't a single .9v Vf diode like this https://www.digikey.com/product-detail/en/SD101CW-TP/SD101CWTPMSCT-ND/717418
work?
Why use two diodes to obtain a series Vf of .9v when you can do it with one?
So I have a single PLL pin that needs .9v and draws no more than 5ma of current. I don't want to waste a whole LDO just for such a small task, so i want to use the 1.8v output from an existing LDO and drop it down to .9v for this pin. What 2-3 low cost component count solution do I have for this...
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