Question
Download Solution PDFIC 7812 is a _____ voltage regulator.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe fixed voltage regulator has an unregulated dc input voltage Vi applied to one input terminal, a regulated output dc voltage V0 at the second terminal, and the third terminal is connected to the ground.
Fixed-Positive Voltage Regulator:
The series 78XX regulators are the three-terminal devices that provide a fixed positive output voltage.
|
IC Part |
Output Voltage (V) |
Minimum Vi (V) |
|
7805 |
+5 |
+7.3 |
|
7806 |
+6 |
+8.4 |
|
7808 |
+8 |
+10.5 |
|
7809 |
+9 |
+11.5 |
|
7812 |
+12 |
+14.6 |
Fixed-Negative Voltage Regulator:
- The series 79XX regulators are the three-terminal IC regulators that provide a fixed negative output voltage.
- This series has the same features and characteristics as the series 78XX regulators except for the pin numbers which are different.
Negative-Voltage regulators in the 79XX series are as shown:
|
IC Part |
Output Voltage (V) |
Minimum Vi (V) |
|
7905 |
– 5 |
–7.3 |
|
7906 |
–6 |
–8.4 |
|
7908 |
–8 |
–10.5 |
|
7909 |
–9 |
–11.5 |
|
7912 |
–12 |
–14.6 |
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