Hi, This is Masa.
I've been asked by customer as below.
1. How to choose the cap on the sense ?
from the datasheet, Its indicated as below.
8.3.1 SENSE Input
The SENSE input provides a pin at which any system voltage can be monitored. If the voltage on this pin drops below VIT, then RESET is asserted. The comparator has a built-in hysteresis to ensure smooth RESET assertions and de-assertions. It is good analog design practice to put a 1-nF to 10-nF bypass capacitor on the SENSE input to reduce sensitivity to transients and layout parasitics. The TPS3808 device is relatively immune to short negative transients on the SENSE pin. Sensitivity to transients is dependent on threshold overdrive, as shown in (Figure 5). The TPS3808G01 can be used to monitor any voltage rail down to 0.405 V using the circuit shown in Figure 9.
Its datasheet recommends that there are cap which is 1nF ~ 10nF.
My customer wants to know how to choose the value and he has concerned the cap and resistor work as low pass filter.
i was wondering if you could tell us how to choose and how is the important for SENSE pin ?
thanks.,
Best Regards.,
Masa
Texas Instruments Japan
