Other Parts Discussed in Thread: TPS629210-Q1, TPS552882-Q1
Hellow,
I'm using the TPS25200-Q1 three times in my board. Twice for 3.3V switching and once for 5V switching.
TPS629210-Q1 feed power to the 3.3V switches. A second TPS629210-Q1 feed power to the 5V switch.
Following is the schematic of one of the three switches.
Below is also a result of a short of the output of the switch to GND.
Yellow waveform is the input voltage, i,e, the TPS629210-Q1 output. Blue waveform is the supply of the buck-boost TPS552882-Q1 that feed the TPS629210-Q1 and red waveform is the current through the short.
I expected to see the image of Figure 12 in the data sheet. Instead I see that the device does not enter short-circuit protection mode following Tios, the voltage to the device falls and the current is limited by the TPS629210-Q1 short circuit protection. from this results it looks like the devices are shorted input-to-output although I checked the device and there is no short between the input and the output.
- Why the device fail to enter short circuit protection?
- Why the device continue to operate and not shut down although its voltage drops below operating condition?
Regards,
Yossi
