NCP1442, NCP1443, NCP1444, NCP1445
570
560
550
540
530
520
510
500
490
−600
−650
−700
−750
−800
−850
−900
−950
480
470
0
20
40
60
80
0
20
40
60
80
T , AMBIENT TEMPERATURE (°C)
A
T , AMBIENT TEMPERATURE (°C)
A
Figure 21. Error Amplifier Transconductance
versus Temperature
Figure 22. Negative Error Amplifier
Transconductance versus Temperature
100
0
100
50
−100
−200
−300
0
−50
−100
−400
−500
−150
−200
−0.25 −0.2 −0.15 −0.1 −0.05
0
0.05 0.1 0.15 0.2 0.25
−0.3
−0.2
V −V
ref
−0.1
, FEEDBACK VOLTAGE (mV)
NFB
0
0.1
0.2
V
ref
−V , FEEDBACK VOLTAGE (mV)
FB
Figure 23. Error Amplifier Output Current
versus Positive Feedback Voltage
Figure 24. Error Amplifier Output Current versus
Negative Feedback Voltage
6.0
5.5
5.0
4.5
4.0
3.5
3.0
0
20
40
60
80
T , AMBIENT TEMPERATURE (°C)
A
Figure 25. Switch Leakage Current versus
Temperature
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