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NCP1422 Datasheet(PDF) 6 Page - ON Semiconductor

Part No. NCP1422
Description  800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1422 Datasheet(HTML) 6 Page - ON Semiconductor

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


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