Overview
The L78L12ACD is a three-terminal positive voltage regulator from STMicroelectronics. It is part of the L78L series, which is known for its robustness and reliability. These regulators are designed to provide a fixed output voltage and are essentially indestructible due to their internal current limiting and thermal shutdown features. The L78L12ACD is specifically configured to deliver an output voltage of 12V and is suitable for a wide range of applications requiring stable voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 11.5 - 12.5 | V |
| Output Current | Up to 100 mA | mA |
| Input Voltage Range | 14.5 to 27 V | V |
| Line Regulation | 200 mV (VI = 14.5 to 27 V, TJ = 25°C) | mV |
| Load Regulation | 100 mV (IO = 1 to 100 mA, TJ = 25°C) | mV |
| Quiescent Current | 6.5 mA (TJ = 25°C), 6 mA (TJ = 125°C) | mA |
| Dropout Voltage | 1.7 V | V |
| Operating Junction Temperature Range | 0 to 125°C | °C |
| Storage Temperature Range | -65 to 150°C | °C |
| Package Type | SOT-89 |
Key Features
- Internal current limiting and thermal shutdown for enhanced reliability and protection.
- No external components required for operation.
- Low quiescent current and low noise output.
- Short-circuit protection and thermal overload protection.
- Available in various output voltages (3.3V, 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18V, 24V).
- Surface mount package (SOT-89) for compact design.
Applications
The L78L12ACD is suitable for a variety of applications including:
- Local or on-card voltage regulation to eliminate noise and distribution problems associated with single-point regulation.
- Use with power pass elements to create high-current voltage regulators.
- Replacement for Zener diode/resistor combinations, offering improved performance with lower quiescent current and noise.
- General-purpose voltage regulation in electronic devices, such as consumer electronics, industrial control systems, and automotive systems.
Q & A
- What is the output voltage of the L78L12ACD?
The output voltage of the L78L12ACD is 12V, with a range of 11.5V to 12.5V.
- What is the maximum output current of the L78L12ACD?
The maximum output current is up to 100 mA.
- What are the input voltage ranges for the L78L12ACD?
The input voltage range is from 14.5V to 27V.
- Does the L78L12ACD require external components for operation?
No, the L78L12ACD does not require any external components for operation.
- What are the key protection features of the L78L12ACD?
The key protection features include internal current limiting, thermal shutdown, and short-circuit protection.
- What is the operating junction temperature range of the L78L12ACD?
The operating junction temperature range is from 0°C to 125°C.
- What package type is the L78L12ACD available in?
The L78L12ACD is available in the SOT-89 surface mount package.
- How does the L78L12ACD compare to Zener diode/resistor combinations?
The L78L12ACD offers improved performance with lower quiescent current and lower noise compared to Zener diode/resistor combinations.
- What are some common applications for the L78L12ACD?
Common applications include local or on-card voltage regulation, high-current voltage regulators, and general-purpose voltage regulation in various electronic devices.
- What is the dropout voltage of the L78L12ACD?
The dropout voltage is 1.7V.
