ncp1421 ON Semiconductor, ncp1421 Datasheet - Page 6

• Manufacturer Part Number: ncp1421
• Description: 600 Ma Sync-rect Pfm Step-up Dc-dc Converter Step-up Dc-dc Converter With True-cutoff And Ring-killer
• Manufacturer: ON Semiconductor

100
100
100
90
80
70
60
50
90
80
70
60
50
90
80
70
60
50
1
1
1
Figure 12. Efficiency vs. Load Current
Figure 10. Efficiency vs. Load Current
Figure 8. Efficiency vs. Load Current
OUTPUT LOADING CURRENT, I
OUTPUT LOADING CURRENT, I
OUTPUT LOADING CURRENT, I
10
10
10
V
V
L = 2.2 mH
C
C
T
A
IN
OUT
IN
OUT
= 25_C
TYPICAL OPERATING CHARACTERISTICS
= 1.5 V
= 22 mF
= 5.0 V
= 22 mF
100
100
100
V
V
L = 6.8 mH
C
C
T
V
V
L = 12 mH
C
C
T
A
A
IN
OUT
LOAD
IN
OUT
LOAD
LOAD
IN
OUT
IN
OUT
= 25_C
= 25_C
= 2.5 V
= 22 mF
= 3.3 V
= 22 mF
= 5.0 V
= 22 mF
= 5.0 V
= 22 mF
/mA
/mA
/mA
http://onsemi.com
1000
1000
1000
NCP1421
6
100
100
100
90
80
70
60
50
90
80
70
60
50
90
80
70
60
50
1
1
1
Figure 13. Efficiency vs. Load Current
Figure 9. Efficiency vs. Load Current
Figure 11. Efficiency vs. Load Current
OUTPUT LOADING CURRENT, I
OUTPUT LOADING CURRENT, I
OUTPUT LOADING CURRENT, I
10
10
10
100
100
100
V
V
L = 10 mH
C
C
T
V
V
L = 10 mH
C
C
T
V
V
L = 2.2 mH
C
C
T
A
A
A
IN
OUT
IN
OUT
LOAD
IN
OUT
IN
OUT
LOAD
IN
OUT
IN
OUT
LOAD
= 25_C
= 25_C
= 25_C
= 2.5 V
= 22 mF
= 2.0 V
= 22 mF
= 1.5 V
= 22 mF
= 3.3 V
= 3.3 V
= 1.8 V
= 22 mF
= 22 mF
= 22 mF
/mA
/mA
/mA
1000
1000
1000