Overview
The L79L12ACZ-TR is a three-terminal negative voltage regulator produced by STMicroelectronics. This component is part of the L79L series, which is designed to provide fixed negative output voltages. The L79L12ACZ-TR is specifically configured to deliver a fixed output voltage of -12V. These regulators are known for their robustness, featuring internal current limiting and thermal shutdown, making them essentially indestructible. With adequate heat-sinking, they can deliver up to 100 mA of output current, making them suitable for a wide range of applications including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (Max) | -35 | V |
| Output Voltage (Fixed) | -12 | V |
| Dropout Voltage (Max) | 1.7 | V |
| Output Current (Max) | 100 | mA |
| Package Style | TO-92 | |
| Mounting Method | Through Hole | |
| Operating Junction Temperature Range | -40 to 125 | °C |
| Storage Temperature Range | -40 to 150 | °C |
| Quiescent Current | 6 mA (at 25°C), 5.5 mA (at 125°C) |
Key Features
- Output current up to 100 mA
- Fixed output voltage of -12V
- Thermal overload protection
- Short-circuit protection
- No external components required
- Output tolerance ±4%
- Available in TO-92 package
Applications
The L79L12ACZ-TR is intended for use in a variety of applications, including:
- Local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation.
- Use with power pass elements to make high-current voltage regulators.
- Replacement for Zener diode/resistor combinations, offering improved output impedance, lower quiescent current, and lower noise.
Q & A
- What is the output voltage of the L79L12ACZ-TR?
The output voltage of the L79L12ACZ-TR is -12V.
- What is the maximum output current of the L79L12ACZ-TR?
The maximum output current is 100 mA.
- What type of protection does the L79L12ACZ-TR have?
The L79L12ACZ-TR features thermal overload protection and short-circuit protection.
- Does the L79L12ACZ-TR require any external components?
No, the L79L12ACZ-TR does not require any external components.
- What is the package style of the L79L12ACZ-TR?
The package style is TO-92.
- What is the operating junction temperature range of the L79L12ACZ-TR?
The operating junction temperature range is -40 to 125°C.
- What is the storage temperature range of the L79L12ACZ-TR?
The storage temperature range is -40 to 150°C.
- Can the L79L12ACZ-TR be used as a replacement for Zener diode/resistor combinations?
- How does the L79L12ACZ-TR improve output impedance compared to Zener diode/resistor combinations?
The L79L12ACZ-TR improves output impedance by typically two orders of magnitude.
- What is the quiescent current of the L79L12ACZ-TR at 25°C and 125°C?
The quiescent current is 6 mA at 25°C and 5.5 mA at 125°C.
