ZHCSFR6C December 2016 – January 2018 TPS22810
PRODUCTION DATA.
The TPS22810 includes a QOD feature. The QOD pin can be configured in one of three ways:
where
Note that during thermal shutdown, the QOD functionality is not available. The device does not discharge the load as RPD does not become engaged.
The fall times of the device depend on many factors including the total resistance of the QOD, VIN, and the output capacitance. When QOD is connected to VOUT, the fall time changes over VIN as the internal RPD varies over VIN. To calculate the approximate fall time of VOUT for a given RQOD, use Equation 2 and Table 1.
where
The fall times' dependency on VIN becomes minimal as the QOD value increases with additional external resistance. See Table 1 for QOD fall times.
| VIN (V) | FALL TIME (μs) 90% - 10%, CIN = 1 μF, IOUT = 0 A , VIN = 0 V, ON = 0 V(1) | |||||
|---|---|---|---|---|---|---|
| TA = 25°C | TA = 85°C | |||||
| CL = 1 μF | CL = 10 μF | CL = 100 μF | CL = 1 μF | CL = 10 μF | CL = 100 μF | |
| 18 | 470 | 4700 | 47000 | 470 | 4700 | 47000 |
| 12 | 450 | 4500 | 45000 | 450 | 4500 | 45000 |
| 9 | 440 | 4400 | 44000 | 440 | 4400 | 44000 |
| 5 | 500 | 5000 | 50000 | 480 | 4800 | 48000 |
| 3.3 | 600 | 6000 | 60000 | 570 | 5700 | 57000 |