The Power Good (PGOOD) pin is an open-drain output. Once the V_FB is between 90% and 110% of the target output voltage, the PGOOD is de-asserted and floats after a 1-ms de-glitch time. A 100 kΩ pullup resistor is recommended to pull the voltage up to VCC. The PGOOD pin is pulled low when:

• the FB pin voltage is lower than 85% or greater than 115% of the target output voltage
• in an OVP, UVP, or thermal shutdown event
• during the soft-start period.