BluePill - Voltage regulator replacement

Generic boards that are not Maple or Maple mini clones, and don't contain the additional USB reset hardware
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Pito
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Joined: Sat Mar 26, 2016 3:26 pm
Location: Rapa Nui

BluePill - Voltage regulator replacement

Post by Pito » Sat Sep 16, 2017 8:21 am

:evil:
Ok, my regulator passed away, so it is the high time to replace it..
I found (fortunately) an LF33 3.3V regulator in my junkbox, which has got the GND at its heat-sink fin :)
It fits perfectly on the BPill's bottom side, the LF33 heat-sink fin is soldered on the two pads (GND) of the Boot pins (from bottom side, of course). (Note: I removed the Boot pin headers in past).
The LF33 3.3V in that DPACK package is rated 500mA, so much better than the old one.
http://www.st.com/content/ccc/resource/ ... 000546.pdf
Below the picture.. Shorten and bend the LF33 pins a little bit such they are at least 1mm off the pcb.
Provided as-is, no warranties of any kind are provided :)
BluePill 3.3.V voltage regulator replacement.jpg
BluePill 3.3.V voltage regulator replacement.jpg (108.16 KiB) Viewed 251 times
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