Overview
The L79L12ACZ-TR is a three-terminal negative voltage regulator produced by STMicroelectronics. This component is part of the L79L series, which is known for its robust design, incorporating internal current limiting and thermal shutdown, making it essentially indestructible. The L79L12ACZ-TR is specifically designed to provide a fixed negative voltage output of -12V, making it suitable for a wide range of applications requiring stable and reliable voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | -11.5 to -12.5 | V |
| Output Current | Up to 100 mA | mA |
| Input Voltage Range | -14.5 to -27 V | V |
| Line Regulation | 250 mV (max.) | mV |
| Load Regulation | 100 mV (max.) | mV |
| Quiescent Current | 6.5 mA (typ.) | mA |
| Dropout Voltage | 1.7 V (typ.) | V |
| Thermal Resistance Junction-Case | 20 °C/W (SO-8), 15 °C/W (TO-92), 115 °C/W (SOT-89) | °C/W |
| Operating Junction Temperature Range | 0 to 125 °C | °C |
| Storage Temperature Range | -40 to 150 °C | °C |
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.
- High supply voltage rejection ratio.
- Available in various packages including TO-92, SO-8, and SOT-89.
- ECOPACK® compliant packages for environmental sustainability.
Applications
The L79L12ACZ-TR is designed for use in a variety of applications, including local or on-card voltage regulation to eliminate noise and distribution problems associated with single-point regulation. It can also be used in conjunction with power pass elements to create high-current voltage regulators. Additionally, it serves as an effective replacement for Zener diode/resistor combinations, offering improved output impedance and lower quiescent current.
Q & A
- What is the output voltage of the L79L12ACZ-TR? The output voltage is -12V with a tolerance of -11.5 to -12.5V.
- What is the maximum output current of the L79L12ACZ-TR? The maximum output current is up to 100 mA.
- What are the input voltage range and dropout voltage for the L79L12ACZ-TR? The input voltage range is -14.5 to -27 V, and the dropout voltage is 1.7 V.
- Does the L79L12ACZ-TR require external components for operation? No, it does not require any external components for operation.
- What are the thermal protection features of the L79L12ACZ-TR? It includes internal current limiting and thermal shutdown.
- In what packages is the L79L12ACZ-TR available? It is available in TO-92, SO-8, and SOT-89 packages.
- What is the operating junction temperature range for the L79L12ACZ-TR? The operating junction temperature range is 0 to 125 °C.
- Is the L79L12ACZ-TR environmentally compliant? Yes, it is available in ECOPACK® compliant packages.
- What are some common applications for the L79L12ACZ-TR? It is used for local or on-card regulation, high-current voltage regulators, and as a replacement for Zener diode/resistor combinations.
- What is the quiescent current of the L79L12ACZ-TR? The quiescent current is typically 6.5 mA.
