NCP1422 ON Semiconductor, NCP1422 Datasheet - Page 6

• Manufacturer Part Number: NCP1422
• Description: Sync-Rect PFM Step-Up DC-DC Converter
• Manufacturer: ON Semiconductor

12.5
−10
7.5
5.0
2.5
10
−5
50
40
30
20
10
15
10
5
0
0
Figure 8. Output Voltage Change vs. Load Current
1.5
1.5
Figure 10. Battery Input Voltage vs. Output Ripple
1
Figure 12. No Load Operating Current vs. Input
V
L = 5.6 mH
C
C
T
A
OUT
IN
OUT
V
V
L = 6.8 mH
C
C
T
= 25_C
A
IN
OUT
IN
OUT
= 22 mF
2.0
= 25_C
= 2.5 V
= 3.3 V
= 22 mF
= 22 mF
OUTPUT LOADING CURRENT, I
1.7
INPUT VOLTAGE AT OUT PIN, V
= 3.3 V
= 22 mF
BATTERY INPUT VOLTAGE, V
2.5
Voltage at OUT Pin
10
1.9
3.0
Voltage
3.5
500 mA
300 mA
100 mA
TYPICAL OPERATING CHARACTERISTICS
2.1
100
V
IN
4.0
= 2.0 V
LOAD
BATT
OUT
2.3
V
/V
IN
/mA
/V
4.5
= 2.5 V
http://onsemi.com
1000
NCP1422
2.5
5.0
6
−10
10
−5
5
0
1
Figure 9. Output Voltage Change vs. Load Curren
Upper Trace: Voltage at LBI Pin, 1.0 V/Division
Lower Trace: Voltage at LBO Pin, 1.0 V/Division
Upper Trace: Input Voltage Waveform, 1.0 V/Division
Lower Trace: Output Voltage Waveform, 2.0 V/Division
V
L = 5.6 mH
C
C
T
A
OUT
IN
OUT
= 25_C
= 22 mF
Figure 13. Startup Transient Response
= 5.0 V
OUTPUT LOADING CURRENT, I
= 33 mF
Figure 11. Low Battery Detect
10
V
IN
= 1.5 V
100
V
V
I
LOAD
IN
OUT
LOAD
= 2.5 V
= 5.0 V
= 10 mA
V
V
IN
/mA
IN
= 3.3 V
= 2.5 V
1000