NCP1442 Datasheet, PDF (6/20 Pages) ON Semiconductor – 4.0 A 280 kHz/560 kHz Boost Regulators

NCP1442, NCP1443, NCP1444, NCP1445
20
V_CC = 30 V
V_CC = 12 V
15
V_CC = 2.7 V
10
5
0
0
20
40
60
80
T_A, AMBIENT TEMPERATURE (°C)
Figure 3. Supply Current versus Temperature
12
10
V_CC = 30 V
8
V_CC = 12 V
6
V_CC = 2.7 V
4
2
DI_SW = 2.99 A
0
0
20
40
60
80
T_A, AMBIENT TEMPERATURE (°C)
Figure 4. DI_CC / DI_SW versus Temperature
800
700
600
500
T_A = 25°C
T_A = 85°C
400
300
200
V_CC = 2.7 V
100
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
I_SW, SWITCH CURRENT (A)
Figure 5. Switch Saturation Voltage versus
Switch Current
300
295
290
285
280
275
270
265
260
255
250
0
10 20 30 40 50 60 70 80
T_A, AMBIENT TEMPERATURE (°C)
Figure 6. Switching Frequency versus
Temperature (NCP1442/3 Only)
600
595
590
585
580
575
570
565
560
555
550
0
10 20 30 40 50 60 70 80
T_A, AMBIENT TEMPERATURE (°C)
Figure 7. Switching Frequency versus
Temperature (NCP1444/5 Only)
125
100
T_A = 25°C
75
T_A = 85°C
50
25
0
0.38 0.39
0.40
0.41
0.42
V_CC = 12 V
0.43 0.44 0.45
V_FB, POSITIVE FEEDBACK VOLTAGE (V)
Figure 8. Switching Frequency versus Positive
Feedback Voltage
http://onsemi.com
6