Datasheet

Operation descriptions VIPER27
16/31 Doc ID 15133 Rev 5
Figure 23. Timing diagram: normal power-up and power-down sequences
Figure 24. Soft-start: timing diagram
I
DD
V
DD
V
DRAIN
V
DDon
time
V
IN
V
DRAIN_START
Power-on
Power-off
Normal operation
regulation is lost here
V
IN
< V
DRAIN_START
HV startup is no more activated
V
DDoff
V
DD(RESTART)
I
DDch
(3mA)
time
time
time
t
SS
( SOFT START- UP )
STEADY STATE
V
FB
V
FBlin
V
FBolp
I
DRAIN
I
Dlim
V
OUT
DELAY (OLP)
t
t
t