Overview
The L78L12ACZ-TR is a three-terminal positive voltage regulator from STMicroelectronics. It is part of the L78L series, which is known for its robust design, featuring internal current limiting and thermal shutdown, making these regulators essentially indestructible. With adequate heat-sinking, the L78L12ACZ-TR can deliver up to 100 mA of output current. It is designed 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. This regulator can also be used with power pass elements to create high-current voltage regulators and as a replacement for Zener diode/resistor combinations, offering improvements in quiescent current and noise reduction.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Temperature Min (°C) | 0.0 |
| Operating Temperature Max (°C) | 125.0 |
| Output Current | Up to 100 mA |
| Output Voltage | 12 V |
| Input Voltage Range | 14.5 to 27 V |
| Quiescent Current | 6.5 mA (at TJ = 25 °C), 6 mA (at TJ = 125 °C) |
| Line Regulation | 250 mV (VI = 14.5 to 27 V, TJ = 25 °C) |
| Load Regulation | 100 mV (IO = 1 to 100 mA, TJ = 25 °C) |
| Dropout Voltage | 1.7 V |
| Package Name | TO-92 |
| Rohs Compliant | Ecopack2 |
| Grade | Industrial |
Key Features
- Internal current limiting and thermal shutdown for enhanced reliability and protection.
- Output current up to 100 mA with adequate heat-sinking.
- Fixed output voltage of 12 V.
- No external components required for operation.
- Available in ± 4% (A) or ± 8% (C) selection.
- Short-circuit protection and thermal overload protection.
- Low quiescent current and noise.
Applications
- Local or on-card voltage regulation to eliminate noise and distribution problems associated with single-point regulation.
- Replacement for Zener diode/resistor combinations, offering lower quiescent current and noise.
- Use with power pass elements to create high-current voltage regulators.
- Industrial applications requiring robust and reliable voltage regulation.
Q & A
- What is the maximum output current of the L78L12ACZ-TR?
The L78L12ACZ-TR can deliver up to 100 mA of output current with adequate heat-sinking.
- What is the output voltage of the L78L12ACZ-TR?
The output voltage of the L78L12ACZ-TR is 12 V).
- What are the operating temperature ranges for the L78L12ACZ-TR?
The operating temperature range is from 0°C to 125°C).
- Does the L78L12ACZ-TR require external components for operation?
No, the L78L12ACZ-TR does not require external components for operation).
- What type of protection features does the L78L12ACZ-TR have?
The L78L12ACZ-TR features internal current limiting, thermal shutdown, and short-circuit protection).
- What is the quiescent current of the L78L12ACZ-TR?
The quiescent current is 6.5 mA at TJ = 25 °C and 6 mA at TJ = 125 °C).
- What is the dropout voltage of the L78L12ACZ-TR?
The dropout voltage is 1.7 V).
- In what package is the L78L12ACZ-TR available?
The L78L12ACZ-TR is available in the TO-92 package).
- Is the L78L12ACZ-TR RoHS compliant?
Yes, the L78L12ACZ-TR is RoHS compliant with Ecopack2 certification).
- What are some common applications for the L78L12ACZ-TR?
Common applications include local or on-card regulation, replacement for Zener diode/resistor combinations, and use with power pass elements to create high-current voltage regulators).
