Overview
The L78M24CDT is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78M series. This regulator is available in various packages, including TO-220, TO-220FP, DPAK, and IPAK, making it versatile for a wide range of applications. The L78M24CDT provides a fixed output voltage of 24V and is designed to deliver up to 0.5 A of output current. It features internal current limiting, thermal shutdown, and safe area protection, making it essentially indestructible if adequate heat sinking is provided.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 23.2 | 24 | 24.8 | V |
| Output Current (IO) | - | - | 500 | mA |
| Input Voltage (VI) | - | - | 40 | V |
| Quiescent Current (Id) | - | 6 | - | mA |
| Dropout Voltage (Vd) | - | 2 | - | V |
| Line Regulation (∆VO) | - | 100 mV | - | mV |
| Load Regulation (∆VO) | - | 200 mV | - | mV |
| Thermal Resistance Junction-Case (RthJC) | - | 5 | - | °C/W |
| Thermal Resistance Junction-Ambient (RthJA) | - | 50 | - | °C/W |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
Key Features
- Fixed output voltage of 24V with an output voltage tolerance of 4% (C version).
- Output current up to 0.5 A with internal current limiting.
- Thermal overload protection and short circuit protection.
- Low quiescent current consumption and low dropout voltage.
- Fast output discharge.
- Available in TO-220, TO-220FP, DPAK, and IPAK packages.
- Guaranteed in extended temperature range.
Applications
The L78M24CDT is useful in a wide range of applications, including:
- Local on-card regulation to eliminate distribution problems associated with single point regulation.
- Power supplies for various electronic devices requiring a stable 24V output voltage.
- Industrial control systems and automation.
- Consumer electronics and appliances).
Q & A
- What is the output voltage of the L78M24CDT?
The output voltage of the L78M24CDT is 24V with a tolerance of 4% (C version)).
- What is the maximum output current of the L78M24CDT?
The maximum output current of the L78M24CDT is up to 0.5 A).
- What are the available packages for the L78M24CDT?
The L78M24CDT is available in TO-220, TO-220FP, DPAK, and IPAK packages).
- Does the L78M24CDT have thermal protection?
Yes, the L78M24CDT features thermal overload protection and short circuit protection).
- What is the quiescent current of the L78M24CDT?
The quiescent current of the L78M24CDT is typically 6 mA).
- What is the dropout voltage of the L78M24CDT?
The dropout voltage of the L78M24CDT is typically 2 V).
- What is the operating junction temperature range for the L78M24CDT?
The operating junction temperature range for the L78M24CDT is -40°C to 125°C).
- Can the L78M24CDT be used for adjustable voltage regulation?
Yes, the L78M24CDT can be used with external components to obtain adjustable voltage and currents).
- What are some common applications of the L78M24CDT?
The L78M24CDT is commonly used in power supplies, industrial control systems, and consumer electronics requiring a stable 24V output voltage).
- Does the L78M24CDT have line and load regulation features?
Yes, the L78M24CDT has line and load regulation features to ensure stable output voltage under varying input and load conditions).
