MC33260
104
OSCILLATOR CHARGE CURRENT (
µ
A)
103
102
101
100
99
98
97
–40
–20
0
20
40
60
80
100
ON–TIME (
µ
s)
Ipin1 = 100
m
A
120
100
80
60
40
20
0
30
50
70
90
110
130
150
170
190
210
TJ, JUNCTION TEMPERATURE (°C)
Ipin1: FEEDBACK CURRENT (
m
A)
– 40°C
25°C
105°C
1 nF Connected to Pin 3
Figure 7. Oscillator Charge Current versus
Temperature
REGULATION AND CS CURRENT SOURCE (
µ
A)
Figure 8. On–Time versus Feedback Current
75
65
ON–TIME (
µ
s)
55
45
35
25
15
50
60
70
80
90
100
Ipin1: FEEDBACK CURRENT (µA)
– 40°C
25°C
105°C
1 nF Connected to Pin 3
207
206
205
204
203
202
201
200
199
198
197
–40
IregH
IOCP
–20
0
20
40
60
80
100
TJ, JUNCTION TEMPERATURE (°C)
Figure 9. On–Time versus Feedback Current
Figure 10. Internal Current Sources versus
Temperature
1.07
(IovpH /I ref ), (I ovpL /I ref ), (I regL /I ref )
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
–40
(IregL/Iref)
(IovpL/Iref)
UNDERVOLTAGE RATIO (I uvp /I ref )
40
60
80
100
1.06
(IovpH/Iref)
0.150
0.148
0.146
0.144
0.142
0.140
0.138
0.136
0.134
0.132
0.130
–40
–20
0
20
–20
0
20
40
60
80
100
TJ, JUNCTION TEMPERATURE (°C)
TJ, JUNCTION TEMPERATURE (°C)
Figure 11. (IovpH/Iref), (IovpL/Iref), (IregL/Iref)
versus Temperature
Figure 12. Undervoltage Ratio versus
Temperature
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