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TPL5110-Q1: Operation without Done signal

Part Number: TPL5110-Q1

I would like to use this part as a timer without driving the done signal.  My application will have this timer interfacing with a shift register that cannot easily drive the DONE pin. Figure 1 it shows that if no done signal is received the DRV signal will swing high 50mS before the T_IP has expired.  This is desired for my application. I am however unable to discern from the DRV signal will swing low again after the full time interval T_IP has expired.  Thanks in advance for your help.

Cheers,

Chris