LM2937-3.3: LM2937ES-3.3

Lamond Bauman

Part Number: LM2937-3.3

I am using the LM2937ES-3.3 in my pcba. I get 5V all the way to the input pin when at output the regulator drops to 1.5V. If I lift the output leg and measure voltage I get about 4V. Is there a way to read the regulator off the PCBA. Has anyone had this problem in there circuit boards?

over 8 years ago

0 David Hopkins over 8 years ago

TI__Expert 8905 points

Hi Lamond,

What is your supply current? The device could be in current limit.

Another thing is that it could be in thermal shutdown - does the device feel hot to the touch?

Have you tried a new part?

Regards,
David

0 David Hopkins over 8 years ago in reply to David Hopkins

TI__Expert 8905 points

Oh and could you also provide a schematic and scope capture so that I can better help you?

Power management

Power management forum

LM2937-3.3: LM2937ES-3.3