SNAS872 December 2024 LMR60410
PRODMIX
The power-good function of the LMR60410 can be used to reset a system microprocessor whenever the output voltage is out of regulation or to facilitate power sequencing of down stream components. This feature is an optional feature that is implemented by including a pullup resistor between the PG pin and a suitable voltage supply. Refer to Section 6.3 for the recommended range of pullup reference voltage.
The power good output is valid after the soft-start sequence has completed and after the input voltage has risen above VIN(PG-VALID). After both of these conditions are met, the voltage between PG and GND indicates whether the output voltage is within regulation or not. A logic HIGH signal indicates that the output voltage is within regulation while a logic LOW signal represents that the output voltage is not in regulation. A deglitch filter has been included to make sure that spurious glitches on the output voltage do not effect the PG pin output.
The PG pin is pulled low under the following conditions:
After the PG pin has been pulled low following a fault condition at the output, the PG pin voltage must remain low for at least tPG-DEASSERT or about 2ms (typical). After tPG-DEASSERT has passed, one of the following conditions must be satisfied for the PG pin voltage to be pulled up: