LP2950ACDT-5RKG Datasheet, PDF (11/22 Pages) ON Semiconductor – 100 mA, Low Power Low Dropout Voltage Regulator

LP2950, LP2951, NCV2951
TYPICAL APPLICATIONS
+V = 2.0 to 30 V
Unregulated Input
6.0 to 10 Vdc
8
NC
5 _Error
V_in
V_out
1
SNS ² NC
0.1
mF
3
LP2951CN
SD
V_O T
6
NC
GND FB
47
1N4001
330 pF
2.2 mF
4.2 V  0.025 V
2.0 M
1.0%
806 k
1.0%
50 k
Lithium Ion
Rechargeable
Cell
GND
Figure 21. Lithium Ion Battery Cell Charger
I_L
Load
I_L = 1.23/R
Error
Output
Shutdown
Input
8
5 _Error ^Vin _Vout ¹
SNS ²
LP2951CN
3 _SD
V_O T ⁶
GND FB
4
7
R
0.1 mF
1.0 mF
Figure 22. Low Drift Current Sink
+V_in
470 k
8
2N3906
5 _Error ^Vin _Vout ¹
470 k
SNS ² NC
Reset
LP2951CN
3 _SD
V_O T ^{6 NC}
R1
Normally
Closed
GND FB
4
7
R2
+V_in
V_out
47 k
Error
Output
1.0 mF _Shutdown
Input
*Sleep
Input
CMOS
Gate
8
5
Error
V_in
V_out
1
SNS ² NC
LP2951CN
3 _SD
V_O T ^{6 NC}
GND FB
4
7
470 k
2N3906
200 k
100 k
V_out
3.3 mF
100 pF
Error flag occurs when V_in is too
low to maintain V_out, or if V_out is re-
duced by excessive load current.
Figure 23. Latch Off When Error Flag Occurs
100 k
Figure 24. 5.0 V Regulator with 2.5 V Sleep Function
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