Overview
The L79L05ABZ 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 voltage regulation in a variety of applications. The L79L05ABZ is notable for its internal current limiting and thermal shutdown features, making it essentially indestructible. With adequate heat-sinking, it can deliver up to 100 mA of output current. It is often used as a replacement for Zener diode/resistor combinations, offering improved output impedance, lower quiescent current, and reduced noise.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | -4.8 to -5.2 | V |
| Output Current | Up to 100 | mA |
| Operating Temperature Range | -40 to 125 | °C |
| Storage Temperature Range | -40 to 150 | °C |
| Quiescent Current | 6 mA (at TJ = 25 °C) | mA |
| Dropout Voltage | 1.7 | V |
| Package Type | TO-92 | |
| RoHS Compliance | Ecopack2 | |
| ECCN US | EAR99 | |
| ECCN EU | NEC |
Key Features
- Output current up to 100 mA
- Output voltage of -5 V
- Internal current limiting and thermal shutdown for protection
- No external components required
- Output tolerance ±4%
- Low quiescent current and noise
- Improved output impedance compared to Zener diode/resistor combinations
Applications
The L79L05ABZ is suitable for a wide range 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 with power pass elements to create high-current voltage regulators. Other applications include automotive systems, industrial control systems, and any scenario requiring stable negative voltage regulation.
Q & A
- What is the output voltage of the L79L05ABZ?
The output voltage of the L79L05ABZ is -5 V, with a tolerance of ±4%.
- What is the maximum output current of the L79L05ABZ?
The maximum output current of the L79L05ABZ is up to 100 mA.
- What are the operating temperature ranges for the L79L05ABZ?
The operating temperature range for the L79L05ABZ is -40 to 125 °C, and the storage temperature range is -40 to 150 °C.
- Does the L79L05ABZ require any external components?
No, the L79L05ABZ does not require any external components for operation.
- What type of protection does the L79L05ABZ have?
The L79L05ABZ has internal current limiting and thermal shutdown protection.
- What is the package type of the L79L05ABZ?
The L79L05ABZ is available in a TO-92 package.
- Is the L79L05ABZ RoHS compliant?
Yes, the L79L05ABZ is RoHS compliant with an Ecopack2 rating.
- What are the ECCN codes for the L79L05ABZ?
The ECCN US code is EAR99, and the ECCN EU code is NEC.
- What are some common applications for the L79L05ABZ?
The L79L05ABZ is commonly used in automotive systems, industrial control systems, and for local or on-card voltage regulation.
- How does the L79L05ABZ compare to Zener diode/resistor combinations?
The L79L05ABZ offers improved output impedance, lower quiescent current, and reduced noise compared to Zener diode/resistor combinations.
