ncp1423 ON Semiconductor, ncp1423 Datasheet - Page 7

• Manufacturer Part Number: ncp1423
• Description: 400 Ma Sync-rect Pfm Stepup Dcdc Converter With Truecutoff And Ringkiller
• Manufacturer: ON Semiconductor

100
300
250
200
150
100
50
−2
−4
−6
90
80
70
60
50
6
4
2
0
0
−50
1
1
V
C
L = 5.6 mH, T
V
Figure 15. EN Input Current vs. Temperature
V
C
T
V
A
OUT
IN
IN
OUT
IN
OUT
= 25°C
Figure 19. Efficiency vs. Load Current
= 10 mF, C
= 10 mF, C
= 1.2 V, 1.5 V, 2.0 V, 2.5 V
Figure 17. Output Voltage Change vs.
I
I
LOAD
LOAD
−25
= 3.3 V
= 3.3 V, L = 5.6 mH
= 3.3 V
T
A
, OUTPUT LOADING CURRENT (mA)
, OUTPUT LOADING CURRENT (mA)
, AMBIENT TEMPERATURE (°C)
A
OUT
OUT
= 25°C
10
10
0
= 22 mF
= 22 mF
Load Current
25
V
IN
TYPICAL OPERATING CHARACTERISTICS
= 1.2 V
1.0 V
100
100
50
V
IN
= 2.5 V
V
1.5 V
IN
75
1.5 V
= 2.5 V
http://onsemi.com
2.0 V
NCP1423
1000
1000
100
7
1.6
1.4
1.2
1.0
0.8
0.6
0.4
100
90
80
70
60
50
40
−2
−4
−6
6
4
2
0
0
1
1
Figure 16. Minimum Startup Battery Voltage vs.
V
C
L = 5.6 mH, T
V
V
C
T
A
OUT
IN
OUT
IN
IN
= 25°C
= 10 mF, C
= 10 mF, C
= 1.0 V, 1.2 V, 1.5 V
I
Figure 20. Efficiency vs. Load Current
I
LOAD
I
LOAD
LOAD
Figure 18. Output Voltage Change vs.
= 1.8 V
= 1.8 V, L = 5.6 mH
50
, OUTPUT LOADING CURRENT (mA)
, OUTPUT LOADING CURRENT (mA)
, OUTPUT LOADING CURRENT (mA)
A
OUT
OUT
= 25°C
10
10
Loading Current
100
= 22 mF
= 22 mF
Load Current
150
1.0 V
T
V
L = 5.6 mH
C
C
V
100
100
A
OUT
IN
OUT
OUT
1.0 V
= 25°C
= 10 mF
= 3.3 V
= 22 mF
> 0.9 x V
200
1.2 V
V
V
IN
1.2 V
IN
= 1.5 V
= 1.5 V
SET
1000
1000
250