NCV1117 ON Semiconductor, NCV1117 Datasheet - Page 10

• Manufacturer Part Number: NCV1117
• Description: 1.0 A Low−dropout Positive Fixed and Adjustable Voltage Regulators
• Manufacturer: ON Semiconductor

Off
Input
Output Control
6.6 V
The 50 W resistor that is in series with the ground pin of the
upper regulator level shifts its output 300 mV higher than the
lower regulator. This keeps the lower regulator off until the
input source is removed.
Input
Figure 28. Battery Backed−Up Power Supply
10
mF
Figure 24. Constant Current Regulator
On
Figure 26. Regulator with Shutdown
+
−
R
Input
CHG
3
+
mF
10
mF
10
mF
10
NCP1117
I out +
1.0 k
XTA
1.0 k
V out(Off) + V ref
+
3
+
3
+
1
3
V ref
R
NCP1117
NCP1117
NCP1117
XT50
XT50
) I adj
2
XTA
2N2222
1
1
1
50 W
R
2
2
2
Constant Current
+
120
360
mF
5.3 V AC Line
5.0 V Battery
10
Output
NCP1117, NCV1117
+
Output
10
mF
http://onsemi.com
+
Output
mF
10
10
Input
Input
mF
10
10
mF
Resistor R2 sets the maximum output voltage. Each
transistor reduces the output voltage when turned on.
Input
Figure 27. Digitally Controlled Regulator
mF
10
Output Voltage Control
Figure 29. Adjusting Output of Fixed
+
Figure 25. Slow Turn−On Regulator
+
3
3
+
NCP1117
R2
3
NCP1117
XTA
2.0 k
XTA
Voltage Regulators
NCP1117
1
1
XT50
2N2907
1
2
R1
2
2
50 k
+
10
mF
2N2222
1N4001
+
mF
10
Output
10
mF
R1
R2
5.0 V to
12 V
+
Output
10
mF
+
Output
10
mF