Overview
The L78S24CV is a 24V positive voltage regulator from STMicroelectronics, part of the L78S series. This three-terminal linear voltage regulator is housed in a TO-220 package and is designed to provide a fixed output voltage of 24V. It is suitable for a wide range of applications requiring local on-card regulation, thereby eliminating the issues associated with single-point regulation. The device is known for its robustness, featuring internal current limiting, thermal shutdown, and safe area protection, making it essentially indestructible if adequate heat sinking is provided.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 23 - 25 | V |
| Input Voltage (min.) | 27 | V |
| Input Voltage (max.) | 38 | V |
| Output Current (max.) | Internally limited up to 2 A | A |
| Package | TO-220 | - |
| Mounting | Thru-hole | - |
| Thermal Resistance Junction-Case | 5 | °C/W |
| Thermal Resistance Junction-Ambient | 50 | °C/W |
| Storage Temperature Range | -65 to 150 | °C |
| Operating Junction Temperature Range | 0 to 150 | °C |
Key Features
- High Output Current: Up to 2 A with adequate heat sinking.
- Thermal Protection: Internal thermal shutdown to prevent overheating.
- Short Circuit Protection: Internal current limiting and short circuit peak current protection.
- Output Transition SOA Protection: Safe area protection to ensure device reliability.
- Low Quiescent Current: Typically 8 mA.
- Line and Load Regulation: Good line and load regulation characteristics.
- Supply Voltage Rejection: High supply voltage rejection ratio.
Applications
The L78S24CV is versatile and can be used in a variety of applications, including:
- Local On-Card Regulation: Eliminates distribution problems associated with single-point regulation.
- Power Supplies: Suitable for use in power supply units requiring a stable 24V output.
- Industrial Control Systems: Used in industrial control systems where reliable voltage regulation is crucial.
- Automotive Systems: Can be used in automotive systems that require robust and reliable voltage regulation.
- Consumer Electronics: Found in various consumer electronic devices requiring stable voltage outputs.
Q & A
- What is the output voltage of the L78S24CV?
The output voltage of the L78S24CV is 24V, with a tolerance range of 23V to 25V.
- What is the maximum input voltage for the L78S24CV?
The maximum input voltage for the L78S24CV is 38V.
- What is the maximum output current of the L78S24CV?
The maximum output current is internally limited up to 2 A with adequate heat sinking.
- What type of package does the L78S24CV come in?
The L78S24CV comes in a TO-220 package.
- Does the L78S24CV have thermal protection?
Yes, the L78S24CV has internal thermal shutdown to prevent overheating.
- Is the L78S24CV protected against short circuits?
Yes, it has internal current limiting and short circuit peak current protection.
- What is the typical quiescent current of the L78S24CV?
The typical quiescent current is 8 mA.
- What are the storage and operating temperature ranges for the L78S24CV?
The storage temperature range is -65°C to 150°C, and the operating junction temperature range is 0°C to 150°C.
- Can the L78S24CV be used for adjustable voltage regulation?
Although designed primarily as a fixed voltage regulator, it can be used with external components to obtain adjustable voltages and currents.
- What are some common applications of the L78S24CV?
Common applications include local on-card regulation, power supplies, industrial control systems, automotive systems, and consumer electronics.
