Tweaking a cheap Tenor TE7022 USB converter board

[themartianboy]

Because the clock is now on a different board, I don't think I need 5V on this board at all. Can someone recommend a low noise 3.3V surface mount regulator to replace the one that is already on there?

 

[marce]

Firstly what regulator is on the board. It may also be adequate for the job.

 

[themartianboy]

Printed on top of the 3.3V regulator is "112ZE 17-33".

 

[marce]

Initial search drew a blank!

 

[themartianboy]

It was the same when I looked too. My guess is that it is pretty low quality.

 

[phofman]

Printed on top of the 3.3V regulator is "112ZE 17-33".

My 2 cents - a clone of http://www.datasheetcatalog.org/datasheets2/21/216987_1.pdf - page 6 upper right corner?

 

[themartianboy]

Good find, but I think it looks more like the first chip on that page: SOT223-3L. The markings would fit with the description. Output Type: 3.3V, Year: 2001, Month: 12, ID Code: ZE (whatever that refers to)

I didn't mention that there is a backwards "C" before the "112ZE". Maybe the backwards "C" is the logo of the manufacturer?

 

[themartianboy]

So does anyone think it's worth replacing the 3.3V regulator?

 

[themartianboy]

McLanz had the advice of using a battery for power. Could a simple 9V alkaline or Ni-MH battery be used instead of the bigger and more expensive lead acid battery?