Specifications:
| Regulator IC | LM7912 |
| Input Voltage | (-19 to -35V DC |
| Output Voltage | (-12V DC) |
| Output Current | 1A |
| Surge Current | 1.5A |
| Dropout voltage | 1.1V |
| Pins | 3 |
| Junction temperature | 125 °C |
| Polarity | Negative |
| Type | Linear V/R |
The L7912ACV is a Single Gauge 3-terminal Negative Voltage Regulator with -12V output voltage. It is available in several fixed output voltages, making it useful in a wide range of applications. This regulator can provide local on-card regulation, eliminating the distribution problems associated with single point regulation, furthermore, having the same voltage option as the L78 positive standard series, this is particularly suited for split power supplies. If adequate heat sinking is provided, it can deliver over 1.5A output current. Although designed primarily as fixed voltage regulators, this device can be used with external components to obtain adjustable voltages and currents.
- Thermal overload protection
- Short-circuit protection
- Output transition SOA protection
- Output tolerance 2% (AC version) or 4% (C version) at 25°C
Applications:
The 7912 voltage regulator has a number of applications, including:
- Power or reference voltage: The 7912 can be used as a constant -12V output regulator for analog and digital circuits.
- Current limiter: The 7912 can be used as a current limiter in certain applications.
- Regulated dual supply: The 7912 can be used for a regulated dual supply.
- Output polarity-reversal-protection circuit: The 7912 can be used for an output polarity-reversal-protection circuit.
Voltage regulators are used in many devices, including computers, televisions, laptops, and small electronic circuits. They are also used in a variety of other applications, including:
- Battery charging and management
- Automotive electronics
- Communication devices
- Consumer electronics
- Medical equipment
- Renewable energy systems
- Industrial control systems




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