NCP3170
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit from Figure 1, T = 25°C, V = V = 12 V, V
= 3.3 V unless otherwise specified)
A
IN
EN
OUT
30
27
2.1
Input Voltage = 18 V
2.0
1.9
1.8
1.7
1.6
1.5
Input Voltage = 18 V
24
21
18
15
12
9
Input Voltage = 12 V
Input Voltage = 12 V
Input Voltage = 4.5 V
Input Voltage = 4.5 V
6
1.4
1.3
3
0
−50 −30 −10
10
30
50
70
90
110 130
−50 −30 −10
10
30
50
70
90 110 130
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 9. ICC Shut Down Current vs.
Temperature
Figure 10. NCP3170 Enabled Current vs.
Temperature
806
805
804
803
802
801
800
799
503
502
501
500
499
498
Input Voltage = 18 V
Input Voltage = 18 V
Input Voltage = 4.5 V
Input Voltage = 12 V
Input Voltage = 12 V
Input Voltage = 4.5 V
497
496
798
797
−50 −30 −10
10
30
50
70
90 110 130
−50 −30 −10
10
30
50
70
90
110 130
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 11. Bandgap Reference Voltage vs.
Temperature
Figure 12. Switching Frequency vs.
Temperature
735
730
880
875
Over Voltage Protection Falling
Under Voltage Protection Rising
725
720
715
870
865
Under Voltage Protection Falling
Over Voltage Protection Rising
860
855
710
705
−50 −30 −10
10
30
50
70
90
110 130
−50 −30 −10
10
30
50
70
90 110 130
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 13. Input Under Voltage Protection at
12 V vs. Temperature
Figure 14. Input Over Voltage Protection at
12 V vs. Temperature
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