ZHCSLK5 September 2020 LM51561H , LM5156H
PRODUCTION DATA
The device has a power-good indicator (PGOOD) to simplify sequencing and supervision. The PGOOD switches to a high impedance open-drain state when the FB pin voltage is greater than the feedback undervoltage threshold (VUVTH), the VCC is greater than the VCC UVLO threshold and the UVLO/EN is greater than the EN threshold. A 25-μs deglitch filter prevents any false pulldown of the PGOOD due to transients. The recommended minimum pullup resistor value is 10 kΩ.
Due to the internal diode path from the PGOOD pin to the BIAS pin, the PGOOD pin voltage cannot be greater than VBIAS+ 0.3 V.