VI
VQ
VD
VPG
trd
trr
PG Delay Time PG Reaction Time
NCV4290
< trr (PG Reaction Time)
VQ,pgt_i
VQ,pgt_d
dV + ID,C
dt CD
Upper Timing Threshold VDU
Lower Timing Threshold VDL
Power−on
Power Good
Signal
Thermal
Shutdown
Voltage Dip Undervoltage Secondary Overload
at Input Not
Spike at Output
Lower than 4 V
Figure 14. Power Good Timing
http://onsemi.com
8