Overview
The L7818CV is a fixed positive voltage regulator from STMicroelectronics, part of the L78 series. This three-terminal regulator is designed to provide a stable output voltage of 18V with a maximum output current of 1.5A. It is available in several package types, including TO-220, TO-220FP, D²PAK, and DPAK, making it versatile for various applications. The L7818CV features internal current limiting, thermal shutdown, and safe area protection, ensuring robust operation and reliability. It is suitable for local on-card regulation, eliminating issues associated with single-point regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Max) | 35 V (for VO = 5 to 18 V), 40 V (for VO = 20, 24 V) | V |
| Output Voltage | 18 V | V |
| Output Current (Max) | 1.5 A | A |
| Dropout Voltage (Max) | 2 V | V |
| Output Voltage Tolerance | ±4% | % |
| Operating Temperature Range | 0°C to 125°C | °C |
| Quiescent Current | 8 mA | mA |
| Output Noise | 110 µV | µV |
| Load Regulation | 0.36 V | V |
| Line Regulation | 0.36 V | V |
| Package Style | TO-220-3 (TO-220AB) | |
| Mounting Method | Through Hole |
Key Features
- Internal current limiting and thermal shutdown for protection against overcurrent and overheating.
- Safe area protection to prevent the device from operating in a region where it could be damaged.
- High accuracy output voltage with a tolerance of ±4%.
- Low dropout voltage of 2V at 1A output current.
- Low output noise of 110 µV.
- Good line and load regulation, ensuring stable output voltage under varying conditions.
- Able to deliver up to 1.5A of output current.
- Available in multiple package types (TO-220, TO-220FP, D²PAK, DPAK) for flexibility in design.
Applications
The L7818CV is suitable for a wide range of applications where a stable and regulated 18V supply is required. These include:
- Local on-card regulation in electronic devices to eliminate distribution problems associated with single-point regulation.
- Power supplies for industrial, automotive, and consumer electronics.
- Regulated voltage sources in medical devices and equipment.
- Battery chargers and power management systems.
- Telecommunication equipment and networking devices.
Q & A
- What is the output voltage of the L7818CV?
The output voltage of the L7818CV is 18V.
- What is the maximum output current of the L7818CV?
The maximum output current of the L7818CV is 1.5A.
- What are the package options available for the L7818CV?
The L7818CV is available in TO-220, TO-220FP, D²PAK, and DPAK packages.
- What is the dropout voltage of the L7818CV?
The dropout voltage of the L7818CV is 2V at 1A output current.
- Does the L7818CV have built-in protection features?
Yes, the L7818CV features internal current limiting, thermal shutdown, and safe area protection.
- What is the operating temperature range of the L7818CV?
The operating temperature range of the L7818CV is 0°C to 125°C.
- What is the quiescent current of the L7818CV?
The quiescent current of the L7818CV is 8 mA.
- How accurate is the output voltage of the L7818CV?
The output voltage tolerance of the L7818CV is ±4%.
- Can the L7818CV be used in high-noise environments?
The L7818CV has low output noise of 110 µV, making it suitable for environments where noise needs to be minimized.
- What are some common applications of the L7818CV?
The L7818CV is commonly used in power supplies, industrial electronics, automotive systems, medical devices, and telecommunication equipment.
