TPL5111: TPL5111 work as timer

Hi Sammi,

If I understand correctly, the customer just needs a logic output from the timer after the 12s timer elapses. In this case, TPL5010 could work in one-shot mode.

I calculate Rext = 8.99K for 12s time interval. The customer would not provide an input on the DONE pin. After the 12s timer elapses, there is a 320ms LOW pulse on RSTn. Or the customer can use the WAKE output.

If the customer does not need the output on the RSTn pin, TPL5111 can be used. TPL5111 can be set to ONE SHOT mode instead of timer mode, in case you only want timing for the first cycle. TPL5111 has no RSTn pin for WDT control, so you must use the DRV pin.

If it still is not possible to generate the desired timing using these devices, the customer might try with 555 timer again. Perhaps use an LDO on the supply.

Kind regards,Lane