NCP1445 ONSEMI [ON Semiconductor], NCP1445 Datasheet - Page 6

• Manufacturer Part Number: NCP1445
• Description: 4.0 A 280 kHz/560 kHz Boost Regulators
• Manufacturer: ONSEMI [ON Semiconductor]

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