ZHCSLG3C June 2020 – August 2022 TPS7B86-Q1
PRODUCTION DATA
The power-good (PG) pin is an open-drain output and can be connected to a regulated supply through an external pullup resistor. The maximum pullup voltage is listed as VPG in the Section 6.3 table. For the PG pin to have a valid output, the voltage on the IN pin must be greater than VUVLO(RISING), as listed in the Section 6.5 table. When VOUT exceeds VPG(TH, RISING), the PG output is high impedance and the PG pin voltage pulls up to the connected regulated supply. When the regulated output falls below VPG(TH, FALLING), the open-drain output turns on and pulls the PG output low. If output voltage monitoring is not needed, the PG pin can be left floating or connected to ground.
By connecting a pullup resistor to an external supply, any downstream device can receive power-good (PG) as a logic signal that can be used for sequencing. Make sure that the external pullup supply voltage results in a valid logic signal for the receiving device.