• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 66 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LP8733: Default of LP87334D

Seong Chang Kim
Intellectual 445 points
Part Number: LP8733


Tool/software:

Hi, Experts.

My custom board has built-in LP87334D, PMIC for AM243.

Referring to the circuit diagram in the data sheet (Using the LP8733xEVM and LP8732xEVM Evaluation Modules (Rev. A),

I worked on the circuit as follows.
It was soldered well by checking the position of pin 1, and 5V is also entering normally.
 
However, each output voltage pin has the following voltage output.
0v85 -> 0V
3.3V -> 0.625V
1.8V -> 0V
 
Best Regards,
+
The regulator is not enabled because the EN pin is not connected. Let me finish the question. Thank you.
  • 0
    TI__Genius 11517 points

    Hello, 

    Thank you for reaching out on E2E. 

    You said that the EN pin is not connected, so all regulators are disabled. 

    0V is expected when EN is low. 

    Is there any other load / source on BUCK1 that could be causing the 0.625 V residual voltage?

    If EN pin is asserted high, are all regulators outputting the expected voltages?

    Best Regards, 
    Sarah