NCP1117ST12T3 ON Semiconductor, NCP1117ST12T3 Datasheet - Page 11

• Manufacturer Part Number: NCP1117ST12T3
• Description: IC REG LDO 1A 12.0V SOT223
• Manufacturer: ON Semiconductor

Specifications of NCP1117ST12T3

• Regulator Topology: Positive Fixed
• Voltage - Output: 12V
• Voltage - Input: Up to 20V
• Voltage - Dropout (typical): 1.07V @ 800mA
• Number Of Regulators: 1
• Current - Limit (min): 1A
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Other names: NCP1117ST12T3OS

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 31. Battery Backed−Up Power Supply
10
mF
Figure 27. Constant Current Regulator
On
Figure 29. Regulator with Shutdown
+
−
R
Input
CHG
3
+
10
mF
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
+
Output
10
mF
http://onsemi.com
+
Output
mF
10
11
Input
Input
10
mF
mF
10
Resistor R2 sets the maximum output voltage. Each
transistor reduces the output voltage when turned on.
Input
Figure 30. Digitally Controlled Regulator
10
mF
Output Voltage Control
Figure 32. Adjusting Output of Fixed
+
Figure 28. Slow Turn−On Regulator
+
3
3
+
NCP1117
R2
3
NCP1117
XTA
2.0 k
XTA
Voltage Regulators
NCP1117
1
XT50
1
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
mF
10