LTC3607

Question

I am using the LTC3607 Dual 600mA DC/DC regulator. The LTC3607 is working in my design without any issues supplying +4, and +5V. My question is: when I remove the input power (+8V) the output will shut off after approximately 400uS. Is there any way to decrease the shut off time? I did try using the Enable pin, it also takes approximately 400uS.

ADIApproved · Accepted Answer

LTC3607 will stop switching soon (usually within 1us) once RUN voltage goes low. Then the decay time of the output voltage depends on the output capacitance and the load resistance. To decrease the decay time, you can reduce the output capacitance (please evaluate the stability) or increase the load current.)

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LTC3607