ZHCSO68 March 2022 TPS629203
PRODUCTION DATA
The TPS629203 has a built-in power-good (PG) feature to indicate whether the output voltage has reached its target and the device is ready. The PG signal can be used for start-up sequencing of multiple rails. The PG pin is an open-drain output that requires a pullup resistor to any voltage up to the recommended input voltage level. PG is low when the device is turned off due to EN, UVLO (undervoltage lockout), or thermal shutdown. VIN must remain present for the PG pin to stay low.
If the power-good output is not used, it is recommended to tie to GND or leave open.
| Logic Signals | PG Status | |||
|---|---|---|---|---|
| VI | EN Pin | Thermal Shutdown | VO | |
| VVIN > UVLO | HIGH | No | VO on target | High Impedance |
| VO < target | LOW | |||
| Yes | x | LOW | ||
| LOW | x | x | LOW | |
| 1.8 V < VVIN < UVLO | x | x | x | LOW |
| VI < 1.8 V | x | x | x | Undefined |