7905 Negative Voltage Regulator 5V 1.5A TO-220
The 5V-7905 Negative Voltage Regulator is an electronic component designed to provide a stable negative output voltage of -5V, typically used in power supply circuits for electronic systems that require negative voltage. It operates in a wide input voltage range, typically from +12V to +24V DC, and provides a constant negative 5V output for use in various applications.
The name 7905 signifies two meaning, “79” means that it is a negative voltage regulator and “05” means that it provides 5V as output. So our 7905 will provide a -5V output voltage. The output current of this IC can go up to 1.5A, but the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current. For example if the input voltage is 12V and you are consuming 1A, then (12-5) * 1 = 7W. This 7 Watts will be dissipated as heat.
Features:
- Fixed −5V output with tight tolerance options (AC and C versions).
- Output current capability up to 1.5A with internal current limiting and thermal shutdown.
- Short-circuit protection and Safe Operating Area (SOA) protection for rugged operation.
- Low quiescent current and good line/load regulation for stable operation.
- Low dropout voltage (typical 1.4V@1A).
- Wide operating and storage temperature ranges suitable for industrial use.
Specifications:
| Physical |
| Case/Package: |
TO-220 |
| Mount: |
Through Hole |
| Number of Pins: |
3 |
| Technical |
| Dropout Voltage: |
1.4 V |
| Max Input Voltage: |
-35 V |
| Max Operating Temperature: |
150 °C |
| Max Output Current: |
1.5 A |
| Min Input Voltage: |
-7 V |
| Min Operating Temperature: |
0 °C |
| Min Output Voltage: |
-5 V |
| Nominal Output Voltage: |
-5 V |
| Number of Channels: |
1 |
| Number of Outputs: |
1 |
| Number of Regulators: |
1 |
| Output Current: |
1.5 A |
| Output Type: |
Fixed |
| Output Voltage: |
-5 V |
| Polarity: |
Negative |
| Power Supply Rejection Ratio (PSRR): |
60 dB |
| Quiescent Current: |
3 mA |
| Tolerance: |
10 % |
Pinout Diagram:
| Pin Number |
Pin Name |
Description |
| 1 |
Ground (Gnd) |
Unregulated Input Voltage |
| 2 |
Input (V+) |
Connected to Ground |
| 3 |
Output (Vo) |
Outputs Regulated -5V |
Why do we need Negative Voltage Regulators?
Negative voltage regulators are mainly used in Op-Amp and other circuits where a negative supply voltage is needed. In many cases where an Op-Amp is working in dual mode power supply a negative voltage will be regulated by these 79XX ICs. Also these IC’s will be able to source current into the ground rail instead of sinking it as normally.
Applications:
- Constant -5V output regulator to for op-amp signals
- Adjustable Output Regulator
- Current Limiter for certain applications
- Regulated Dual Supply
Documents:
