Agilent E3640A Obsolete part need some help

[WuLi]

Hi,
I have an Agilent E3640A PS with a defective CS8122 voltage regulator. This voltage regulator was fabricated by On Semiconductors and it became obsolete. I've been looking around the internet trying to find this part but I've been unsuccessful so far. I don't have experience with finding replacements for obsolete parts. Can anybody give me a hand on finding a replacement for this part? Thanks in advance.
John

[tautech]

Hi,
I have an Agilent E3640A PS with a defective CS8122 voltage regulator. This voltage regulator was fabricated by On Semiconductors and it became obsolete. I've been looking around the internet trying to find this part but I've been unsuccessful so far. I don't have experience with finding replacements for obsolete parts. Can anybody give me a hand on finding a replacement for this part? Thanks in advance.
John

CS8122 package?
Link to datasheet?

[WuLi]

Sorry,
I forgot that. It's the CS8122YTVA5 Vertical TO220 Package as listed in the datasheet. I've attached the datasheet.
John

[free_electron]

That thing was originally made by cherry semiconductors , later borged by ON SEMI.

Lp2957 could do it but cant do more than 300mA ...

I weeded out possible candidates. You will have to check their pinout.
You can mimic the delayed start by adding an r and c to the enable pin.

http://www.digikey.com/product-search/en?pv16=8696&pv16=8698&pv16=12652&pv16=287&pv16=12742&pv16=8169&pv16=8881&pv16=991&pv16=12745&FV=fff40027%2Cfff80182%2Cc00001&k=Regulator&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

[Jay_Diddy_B]

Hi,

This may help.

Here is the schematic from the E3633A:



It uses the LM2925T this looks to be pin compatible with the CS8122. Here is a link to the datasheet:

http://www.ti.com.cn/cn/lit/ds/symlink/lm2925.pdf

Good Luck,

Jay_Diddy_B

[WuLi]

Thank you guys for your input. Someone at the Agilent / hp user groups pointed out the LM2925 device to me. It seems to be compatible with the CS8122. I've ordered this device and will test it in my unit as soon as it comes in. Thanks again.
John
Jay_Diddy_B You've found it to ;-) I'll ley you guys know if it works...