SLVSDF7A December 2016 – July 2017 TPSM84A21
Applications requiring voltage rail sequencing can benefit from the PGOOD signal present with the TPSM84A21. The PGOOD pin is an open drain output. When the output voltage is typically between 95% and 105% of the set point, the PGOOD pin pull-down is released and the pin floats, requiring an external pull-up resistor for a high signal. A 10-kΩ pull-up resistor is placed between the PGOOD pin and an external 5V rail.