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Original question:

TPSM8A29: Start and stop Voltage

TPSM8A29: PGOOD

Karthik Shenoy
Prodigy 160 points
Part Number: TPSM8A29


The recommended value for PGOOD resistor is between 1k and 100k as mentioned in the datasheet. What exact value needs to be chosen and how it will affect the performance? Does this resistor needs to be pulled up with VCC pin ?

  • 0
    TI__Mastermind 25180 points

    Where the PGOOD connects in your system will depend on whether to connect to VCC and the values of pullup resistor.   The VCC voltage is 4.5V.      

    The PGOOD pin has max sink current capability and a leakage current.  These values will determine the minimum and maximum resistance for the pull up. 

    The PGOOD presumably connects to another device in the system.    The pin on that device will have a maximum voltage rating, a low level input voltage and high level input voltage.   The pgood pullup resistor and the pullup voltage source will need to take in the limitations of the pin it connects to.   Using a 10kOhm, is a good compromise when you are unsure.