Overview
The L78L08ABZTR, produced by STMicroelectronics, is part of the L78L series of three-terminal positive voltage regulators. These regulators are designed to be highly robust, 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. The L78L series is intended for use in a wide range of applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation. They 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 | Unit |
|---|---|---|
| Output Current | Up to 100 mA | mA |
| Output Voltage | 8 V | V |
| Input Voltage Range | 10.5 to 23 V | V |
| Line Regulation | 125 mV (VI = 11 to 23 V, TJ = 25 °C) | mV |
| Load Regulation | 80 mV (IO = 1 to 100 mA, TJ = 25 °C) | mV |
| Quiescent Current | 6 mA (TJ = 25 °C), 5.5 mA (TJ = 125 °C) | mA |
| Output Noise Voltage | 40 µV (B = 10 Hz to 100 kHz, TJ = 25 °C) | µV |
| Dropout Voltage | 2 V | V |
| Operating Junction Temperature Range | -40 to 125 °C | °C |
| Package Type | TO-92 |
Key Features
- Output current up to 100 mA
- Output voltage of 8 V with ± 4% (A) or ± 8% (C) selection
- Internal current limiting and thermal shutdown for robust operation
- Short-circuit protection
- No external components required
- Low quiescent current and low noise
- Available in TO-92, SO-8, and SOT-89 packages
Applications
The L78L08ABZTR is suitable for a variety of applications, including:
- Local or on-card voltage regulation to eliminate noise and distribution problems
- Replacement for Zener diode/resistor combinations with improved performance
- Use with power pass elements to create high-current voltage regulators
- Industrial and commercial power supply systems
- Consumer electronics requiring stable voltage regulation
Q & A
- What is the maximum output current of the L78L08ABZTR?
The maximum output current is up to 100 mA.
- What are the available output voltages for the L78L series?
The L78L series offers output voltages of 3.3, 5, 6, 8, 9, 10, 12, 15, 18, and 24 V.
- What are the key protection features of the L78L08ABZTR?
The key protection features include internal current limiting, thermal shutdown, and short-circuit protection.
- Do I need external components to use the L78L08ABZTR?
No, the L78L08ABZTR does not require any external components.
- What is the operating junction temperature range for the L78L08ABZTR?
The operating junction temperature range is -40 to 125 °C.
- What package types are available for the L78L series?
The L78L series is available in TO-92, SO-8, and SOT-89 packages.
- How does the L78L08ABZTR improve upon Zener diode/resistor combinations?
The L78L08ABZTR offers lower quiescent current and lower noise compared to Zener diode/resistor combinations.
- Can the L78L08ABZTR be used in high-current applications?
Yes, the L78L08ABZTR can be used with power pass elements to create high-current voltage regulators.
- What is the typical quiescent current of the L78L08ABZTR?
The typical quiescent current is 6 mA at TJ = 25 °C and 5.5 mA at TJ = 125 °C.
- What is the dropout voltage of the L78L08ABZTR?
The dropout voltage is approximately 2 V.
