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LP2950 数据表(PDF) 11 Page - ON Semiconductor

部件名 LP2950
功能描述  100 mA, Low Power Low Dropout Voltage Regulator
PDF  22 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

LP2950 数据表(HTML) 11 Page - ON Semiconductor

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LP2950, LP2951, NCV2951
http://onsemi.com
11
TYPICAL APPLICATIONS
Figure 21. Lithium Ion Battery Cell Charger
1N4001
GND
4.2 V
 0.025 V
NC
NC
50 k
5
3
Error
SD
GND FB
47
6
VO T
SNS
2
Vout
Vin
8
1
0.1
mF
NC
LP2951CN
2.2
mF
330 pF
806 k
1.0%
2.0 M
1.0%
Lithium Ion
Rechargeable
Cell
Unregulated Input
6.0 to 10 Vdc
Figure 22. Low Drift Current Sink
Error
Output
Shutdown
Input
+V = 2.0 to 30 V
1.0
mF
R
5
3
Error
SD
GND
FB
47
6
VO T
SNS
2
Vout
Vin
8
1
0.1
mF
Load
IL = 1.23/R
IL
Figure 23. Latch Off When Error Flag Occurs
Reset
+Vin
Vout
1.0
mF
NC
NC
R2
R1
470 k
5
3
Error
SD
GND FB
47
6
VO T
SNS
2
Vout
Vin
8
1
LP2951CN
470 k
Error flag occurs when Vin is too
low to maintain Vout, or if Vout is re-
duced by excessive load current.
Normally
Closed
2N3906
Figure 24. 5.0 V Regulator with 2.5 V Sleep Function
*Sleep
Input
+Vin
Vout
3.3
mF
NC
NC
100 k
100 k
470 k
5
3
Error
SD
GND
FB
47
6
VO T
SNS
2
Vout
Vin
8
1
LP2951CN
200 k
100 pF
2N3906
47 k
CMOS
Gate
Error
Output
Shutdown
Input
LP2951CN



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