Overview
The L7812CT is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78 series. This regulator is available in various packages, including TO-220, TO-220FP, D²PAK, and DPAK, and is designed to provide fixed output voltages. The L7812CT specifically provides a fixed output voltage of 12V. These regulators are useful in a wide range of applications due to their ability to provide local on-card regulation, thus eliminating the distribution problems associated with single point regulation. Each device embeds internal current limiting, thermal shut-down, and safe area protection, making them essentially indestructible if adequate heat sinking is provided.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 11.75 - 12.25 | V |
| Output Current | Up to 1.5 A | A |
| Input Voltage (for VO = 12V) | 14.8 to 35 V | V |
| Thermal Resistance Junction-Case (TO-220) | 5 | °C/W |
| Thermal Resistance Junction-Ambient (TO-220) | 50 | °C/W |
| Operating Junction Temperature | 0 to 125 °C | °C |
| Storage Temperature Range | -65 to 150 °C | °C |
| Dropout Voltage | 2 V | V |
| Output Voltage Tolerance | ±2% (A version) | % |
| Output Noise Voltage | 10 µV/VO | µV/VO |
| Output Resistance | 17 mΩ | mΩ |
| Short Circuit Current | 0.2 A | A |
| Short Circuit Peak Current | 2.2 A | A |
Key Features
- Output current up to 1.5 A
- Fixed output voltage of 12V
- Thermal overload protection
- Short circuit protection
- Output transition SOA protection
- 2% output voltage tolerance (A version)
- Guaranteed in extended temperature range (A version)
- Internal current limiting and safe area protection
- Available in TO-220, TO-220FP, D²PAK, and DPAK packages
Applications
The L7812CT is suitable for a variety of applications, including:
- Communications equipment
- Computers and peripherals
- Industrial control systems
- Local on-card regulation in complex electronic systems
Q & A
- What is the output voltage of the L7812CT?
The output voltage of the L7812CT is 12V.
- What is the maximum output current of the L7812CT?
The maximum output current of the L7812CT is up to 1.5 A.
- What are the available packages for the L7812CT?
The L7812CT is available in TO-220, TO-220FP, D²PAK, and DPAK packages.
- Does the L7812CT have thermal protection?
Yes, the L7812CT has thermal overload protection and thermal shut-down.
- What is the operating junction temperature range for the L7812CT?
The operating junction temperature range for the L7812CT is 0 to 125 °C.
- What is the dropout voltage of the L7812CT?
The dropout voltage of the L7812CT is 2 V.
- Does the L7812CT have short circuit protection?
Yes, the L7812CT has short circuit protection.
- What is the output voltage tolerance of the L7812CT?
The output voltage tolerance of the L7812CT is ±2% (A version).
- Can the L7812CT be used for adjustable voltage regulation?
Yes, the L7812CT can be used with external components to obtain adjustable voltage and currents.
- What are some common applications of the L7812CT?
The L7812CT is commonly used in communications equipment, computers and peripherals, and industrial control systems.
