Overview
The L79L12ACZ-AP is a three-terminal negative voltage regulator from STMicroelectronics. It is part of the L79L series, which is designed to provide reliable and stable negative voltage regulation. These regulators are equipped with 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 L79L12ACZ-AP can deliver up to 100 mA output current if adequate heat-sinking is provided.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | -11.5 | -12 | -12.5 | V |
| Output Current (IO) | 100 | mA | ||
| Line Regulation (ΔVO) | 250 | mV | ||
| Load Regulation (ΔVO) | 100 | mV | ||
| Quiescent Current (Id) | 3 | mA | ||
| Operating Temperature (TJ) | -40 | 125 | °C | |
| Package | TO-92 |
Key Features
- Output current up to 100 mA
- Output voltage of -12 V
- Thermal overload protection
- Short-circuit protection
- No external components required
- Output tolerance ± 4%
- Low quiescent current and low noise
Applications
The L79L12ACZ-AP is suitable for various applications, including:
- Local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation.
- Use with power pass elements to make high-current voltage regulators.
- Replacement for Zener diode/resistor combinations, offering improved output impedance and lower noise.
- Split power supplies, particularly where negative voltage regulation is required.
Q & A
- What is the maximum output current of the L79L12ACZ-AP?
The maximum output current is up to 100 mA if adequate heat-sinking is provided.
- What are the available output voltages for the L79L series?
The L79L series offers output voltages of -5 V, -8 V, -12 V, and -15 V.
- Does the L79L12ACZ-AP require external components?
No, the L79L12ACZ-AP does not require any external components.
- What is the operating temperature range for the L79L12ACZ-AP?
The operating temperature range is from -40°C to 125°C.
- What type of protection does the L79L12ACZ-AP have?
The L79L12ACZ-AP has thermal overload protection and short-circuit protection.
- What is the typical quiescent current of the L79L12ACZ-AP?
The typical quiescent current is 3 mA.
- Can the L79L12ACZ-AP be used in high-current applications?
Yes, it can be used with power pass elements to make high-current voltage regulators.
- What is the output tolerance of the L79L12ACZ-AP?
The output tolerance is ± 4%.
- How does the L79L12ACZ-AP compare to Zener diode/resistor combinations?
The L79L12ACZ-AP offers improved output impedance and lower noise compared to Zener diode/resistor combinations.
- What package type is the L79L12ACZ-AP available in?
The L79L12ACZ-AP is available in the TO-92 package.
