NCP1421 View Datasheet(PDF) - ON Semiconductor
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NCP1421 Datasheet PDF : 14 Pages
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NCP1421
TYPICAL OPERATING CHARACTERISTICS
1.220
1.210
1.200
VOUT = 3.3 V
L = 10 mH
CIN = 22 mF
COUT = 22 mF
CREF = 1.0 mF
TA = 25_C
1.190
VIN = 1.5 V
VIN = 2.0 V
1.220
1.210
CREF = 200 nF
IREF = 0 mA
TA = 25°C
VIN = 2.5 V
1.200
1.190
1.1801
10
100
OUTPUT CURRENT, ILOAD/mA
1000
Figure 2. Reference Voltage vs. Output Current
1.180
1.5
2
2.5
3
3.5
4
4.5
5
VOLTAGE AT OUT PIN, VOUT/V
Figure 3. Reference Voltage vs. Voltage at OUT Pin
1.205
1.200
0.6
VOUT = 3.3 V
0.5
1.195
1.190
1.185
1.180
−40
VOUT = 3.3 V
CREF = 200 nF
IREF = 0 mA
−20
0
20 40
60
80 100
AMBIENT TEMPERATURE, TA/°C
Figure 4. Reference Voltage vs. Temperature
0.4
P−FET (M2)
0.3
0.2
N−FET (M1)
0.1
0.0
−40 −20 0
20
40
60
80 100
AMBIENT TEMPERATURE, TA/°C
Figure 5. Switch ON Resistance vs. Temperature
1.0
1.6
0.9
0.8
0.7
0.6
0.5
−40 −20
0
20 40
60
80 100
AMBIENT TEMPERATURE, TA/°C
Figure 6. LX Switch Max. ON Time vs. Temperature
1.4
1.1
0.9
TA = 25°C
0.60
50
100
150
200
250
OUTPUT LOADING CURRENT, ILOAD/mA
Figure 7. Minimum Startup Battery Voltage vs.
Loading Current
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