Non-volatile accted by power down

Hello,

Can you please send me your schematic with resistance values?

Regards,

Jeff

I can provide the immediate circuit

Hello,

  What are your Adj pulse widths during programming?

Tst, Tw, Tadj, Tst etc.

Note from DS:

During factory calibration, a simple adjustment procedure must be followed. This entire procedure includes setting VIN, toggling ADJ, waiting as VOUT self-adjusts, and waiting for the completion of the EEPROM storage cycle (see the timing diagram in Figure 1). At the start of calibration, a voltage must be placed on VIN. This voltage needs to be completely stable before the adjustment procedure begins, and it must remain stable throughout the entire adjustment procedure. The DS4305 starts its self-adjust procedure when the ADJ pin is pulled low and held low for at least tADJ, after which it can be released at any time. Once ADJ has been released, it should not be toggled again for the remainder of the adjustment procedure.

Regards,

Jeff

My pulse us 50mS. I found the issue seems to be a combination of the low voltage I was trying to load into it with a weak pull-up that was not allowing it to have a close enough VIN vs Vout to store the value in the EEPROM.

Great - glad to hear it!

Jeff