Overview
The L7812CD2T-TR 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, TO-3, D²PAK, and DPAK, making it versatile for a wide range of applications. It is designed to provide local on-card regulation, eliminating distribution problems associated with single-point regulation. The device is known for its robustness, featuring internal current limiting, thermal shutdown, and safe area protection, which makes it essentially indestructible if adequate heat sinking is provided.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage - Max | 35 | V |
| Output Voltage Fixed | 12 | V |
| Dropout Voltage - Max | 2 | V |
| Output Current - Max | 1.5 | A |
| Operating Temperature Range | 0°C to 125°C | |
| Regulator Topology | Fixed | |
| Quiescent Current | 8 mA | |
| No. of Outputs | Single | |
| Load Regulation | 240 mV | |
| Current - Limit | 2.2 A | |
| Line Regulation | 240 mV | |
| Package Style | TO-263-3 (D2PAK) | |
| Mounting Method | Surface Mount |
Key Features
- Output current up to 1.5 A
- Output voltages of 5, 6, 8, 8.5, 9, 12, 15, 18, 24 V (depending on the specific model in the series)
- Thermal overload protection
- Short circuit protection
- Output transition SOA (Safe Operating Area) protection
- 2% output voltage tolerance (A version)
- Guaranteed in extended temperature range (A version)
Applications
The L7812CD2T-TR is useful in a wide range of applications where local on-card regulation is required. It can be used in various electronic systems to provide stable voltage regulation, eliminating the distribution problems associated with single-point regulation. Common applications include power supplies, industrial control systems, medical devices, and any system requiring reliable and stable voltage regulation.
Q & A
- What is the maximum input voltage for the L7812CD2T-TR?
The maximum input voltage for the L7812CD2T-TR is 35 V.
- What is the fixed output voltage of the L7812CD2T-TR?
The fixed output voltage of the L7812CD2T-TR is 12 V.
- What is the maximum output current of the L7812CD2T-TR?
The maximum output current of the L7812CD2T-TR is 1.5 A.
- What are the key protection features of the L7812CD2T-TR?
The key protection features include thermal overload protection, short circuit protection, and output transition SOA protection.
- What is the operating temperature range for the L7812CD2T-TR?
The operating temperature range for the L7812CD2T-TR is 0°C to 125°C.
- What package styles are available for the L7812CD2T-TR?
The L7812CD2T-TR is available in TO-220, TO-220FP, TO-3, D²PAK, and DPAK packages.
- How does the L7812CD2T-TR provide local on-card regulation?
The L7812CD2T-TR provides local on-card regulation by eliminating the distribution problems associated with single-point regulation, ensuring stable voltage supply at the point of use.
- Can the L7812CD2T-TR be used to obtain adjustable voltage and currents?
Yes, although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents.
- What is the quiescent current of the L7812CD2T-TR?
The quiescent current of the L7812CD2T-TR is 8 mA.
- What is the load regulation of the L7812CD2T-TR?
The load regulation of the L7812CD2T-TR is 240 mV.
- What is the line regulation of the L7812CD2T-TR?
The line regulation of the L7812CD2T-TR is 240 mV.
