Overview
The L79L12ACD13TR is a three-terminal negative voltage regulator from STMicroelectronics. This component is part of the L79L series, which is designed to be essentially indestructible due to its internal current limiting and thermal shutdown features. It can deliver up to 100 mA of output current if an adequate heat sink is provided. The L79L12ACD13TR is intended for use as a fixed voltage regulator in various applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation. It can also be used with power pass elements to create high-current voltage regulators and as a replacement for Zener diode/resistor combinations, offering improved output impedance, lower quiescent current, and reduced noise.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | Up to 100 | mA |
| Output Voltage | -12 | V |
| Output Tolerance | +/- 4% | |
| Thermal Overload Protection | Yes | |
| Short-Circuit Protection | Yes | |
| Package | SO-8 | |
| Operating Junction Temperature Range | -40 to 125 | °C |
| Storage Temperature Range | -40 to 150 | °C |
| Quiescent Current | 6.5 mA (typical at 25°C) | |
| Dropout Voltage | 1.7 V |
Key Features
- Output current up to 100 mA
- Output voltage of -12 V
- Thermal overload protection and short-circuit protection
- No external components required
- Output tolerance of +/- 4%
- Improved output impedance compared to Zener diode/resistor combinations
- Lower quiescent current and lower noise
Applications
The L79L12ACD13TR is suitable for a wide range 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 in various circuits.
- General-purpose negative voltage regulation in electronic devices.
Q & A
- What is the maximum output current of the L79L12ACD13TR?
The maximum output current is up to 100 mA.
- What is the output voltage of the L79L12ACD13TR?
The output voltage is -12 V.
- Does the L79L12ACD13TR have thermal overload protection?
Yes, it has thermal overload protection and short-circuit protection.
- Are external components required for the L79L12ACD13TR?
No, external components are not required.
- What is the output tolerance of the L79L12ACD13TR?
The output tolerance is +/- 4%.
- What are the benefits of using the L79L12ACD13TR over Zener diode/resistor combinations?
It offers improved output impedance, lower quiescent current, and reduced noise.
- What is the operating junction temperature range of the L79L12ACD13TR?
The operating junction temperature range is -40 to 125 °C.
- What is the storage temperature range of the L79L12ACD13TR?
The storage temperature range is -40 to 150 °C.
- What is the typical quiescent current of the L79L12ACD13TR at 25°C?
The typical quiescent current is 6.5 mA.
- What is the dropout voltage of the L79L12ACD13TR?
The dropout voltage is 1.7 V.
