VIPer20A-E
Operation description
5.8
Operation pictures
V
DD
Regulation point
Slope =
G in m
m A/V
Figure 5.
Figure 6.
Undervoltage lockout
I
COMP
I
COMPHI
I
DD
I
DD0
V
DD
0
I
COMPLO
V
DDreg
FC00150
V
DDhyst
V
DDoff
I
DDch
V
DS
= 35 V
Fsw = 0
V
DDon
V
DD
FC00170
Figure 7.
Transition time
I
D
Figure 8.
Shutdown action
VOSC
t
10% Ipeak
t
VCOMP
V
DS
tDISsu
90% V
D
VCOMPth
t
10% V
D
t
tf
tr
FC00160
ID
t
ENABLE
ENABLE
DISABLE
FC00060
Figure 9.
Breakdown voltage vs temperature
1.15
FC00180
Figure 10. Typical frequency variation
(%)
1
0
-1
-2
-3
FC00190
BV
DSS
(Normalized)
1.1
1.05
1
-4
-5
0
20
40 60 80 100 120
Temperature (掳C)
0.95
0
20
40 60 80 100 120 140
Temperature (掳C)
15/34