LM723CN Regulator

usbcd36 · Post by **usbcd36** » Thu Aug 04, 2005 6:55 pm

I need help with this regulator. The datasheet doesn't describe how to wire it for a specific voltage. In this case, I want it to be a 3.3v switching regulator (for my N64p). This is the datasheet if it helps:

http://pdf.alldatasheet.co.kr/datasheet ... 723CN.html

HK-47 · Post by **HK-47** » Thu Aug 04, 2005 7:06 pm

Use "Vo=(Vref*R2)/(R1+R2)" On pg 7 theres a "cheat sheet" that you can fine tune to 3.3v. The formula Vo=(Vref*R2)/(R1+R2) will let you figure out resistor values. (Vo=voltage out (3.3v), Vref I think is the input, and the rest are resistors.) Stick to fig. 13 and swap out R1 and R2 for the correct values.

usbcd36 · Post by **usbcd36** » Thu Aug 04, 2005 8:46 pm

Hmm, thanks. I wonder what I need to fine-tune now to get this to 3.3vâ€¦

Edit: What do I do about Cref and RSC? (I am using it as a switching regulator.) And what is the "logic input" anyway?

usbcd36 · Post by **usbcd36** » Mon Aug 08, 2005 3:31 pm

Anyone? I need to buy the parts tonight (sorry for the double post, no one answered my question)!

Unidentified Assilant · Tue Aug 09, 2005 4:32 am

when I first seen this post I thought it was leetspeak! I am so stupid!