Overview
The L78L09ABZ is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78L series. These regulators are designed to provide a fixed output voltage and are known for their robustness, featuring internal current limiting and thermal shutdown, making them essentially indestructible. They are suitable for a wide range of applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation. The L78L09ABZ specifically provides an output voltage of 9V and can deliver up to 100 mA of output current, making it a reliable choice for various electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 8.55 to 9.45 | V |
| Output Current | Up to 100 | mA |
| Input Voltage Range | 11.5 to 23 | V |
| Dropout Voltage | 1.7 | V |
| Line Regulation | 225 mV (VI = 11.5 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 |
| Operating Junction Temperature Range | -40 to 125 | °C |
| Package Type | TO-92 |
Key Features
- Output current up to 100 mA
- Fixed output voltage of 9V
- Internal current limiting and thermal shutdown for robust operation
- No external components required for operation
- Available in ± 4% (A) or ± 8% (C) selection
- Low quiescent current and low noise
- Short-circuit protection
Applications
The L78L09ABZ 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 electronic systems requiring stable voltage regulation
Q & A
- What is the output voltage of the L78L09ABZ?
The output voltage of the L78L09ABZ is 9V, with a tolerance range of 8.55 to 9.45V.
- What is the maximum output current of the L78L09ABZ?
The L78L09ABZ can deliver up to 100 mA of output current.
- What is the input voltage range for the L78L09ABZ?
The input voltage range for the L78L09ABZ is 11.5 to 23V.
- What is the dropout voltage of the L78L09ABZ?
The dropout voltage of the L78L09ABZ is 1.7V.
- Does the L78L09ABZ require external components for operation?
No, the L78L09ABZ does not require external components for operation.
- What are the key protection features of the L78L09ABZ?
The L78L09ABZ features internal current limiting and thermal shutdown, as well as short-circuit protection.
- What is the operating junction temperature range of the L78L09ABZ?
The operating junction temperature range of the L78L09ABZ is -40 to 125°C.
- In what package type is the L78L09ABZ available?
The L78L09ABZ is available in the TO-92 package type.
- What are some common applications of the L78L09ABZ?
The L78L09ABZ is commonly used in local or on-card voltage regulation, as a replacement for Zener diode/resistor combinations, and in industrial and commercial electronic systems.
- How does the L78L09ABZ improve upon Zener diode/resistor combinations?
The L78L09ABZ offers lower quiescent current and lower noise compared to Zener diode/resistor combinations.
