Does the Thermal Shut Down output from the LM4652 an analog signal or a digital?
The output of the TSD pin on the LM4652 is at zero volts until the die temperature reaches about 140° C. The voltage then starts to increase quickly as the die temperature continues to increase to over 150° C. When the voltage reaches 5V the LM4651 goes into STBY mode. The TSD output will go as high as 6V. When the die temperature cools below 150° C the TSD voltage transitions down to less than 2V.
