ZHCSH69 December 2017 TPS40345
PRODUCTION DATA.
The TPS40345 provides an indication that output is good for the converter. This is an open-drain signal and pulls low when any condition exists that would indicate that the output of the supply might be out of regulation. These conditions include the following:
NOTE
When there is no power to the device, PGOOD is not able to pull close to GND if an auxiliary supply is used for the power good indication. In this case, a built-in resistor connected from drain to gate on the PGOOD pulldown device makes the PGOOD pin look approximately like a diode to GND.