Overview
The MC79L12ACPRA is a fixed negative-voltage regulator from Onsemi, part of the MC79L00A Series. This device is designed to provide a stable output voltage of -12V and is suitable for a wide range of applications requiring up to 100 mA of current. It is known for its ease of use, low cost, and robust protection features, including thermal overload protection and internal short circuit protection.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | -11.5 | -12 | -12.5 | Vdc |
| Input Voltage Range | -14.5 | - | -27 | Vdc |
| Output Current | - | - | 100 | mA |
| Input Regulation (TJ = +25°C) | - | - | 300 | mV |
| Load Regulation (TJ = +25°C, 1.0 mA ≤ IO ≤ 100 mA) | - | - | 200 | mV |
| Dropout Voltage (IO = 40 mA, TJ = +25°C) | - | - | 1.7 | Vdc |
| Ripple Rejection (f = 120 Hz, TJ = +25°C) | 37 | 42 | - | dB |
| Operating Junction Temperature | 0 | - | 125 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
Key Features
- Fixed Output Voltage: Provides a stable output voltage of -12V.
- Current Capability: Can supply up to 100 mA of output current.
- Thermal Overload Protection: Shuts down the circuit when subjected to excessive power overload conditions.
- Internal Short Circuit Protection: Protects against short circuit conditions.
- Low Dropout Voltage: Dropout voltage of 1.7 V at 40 mA output current.
- High Ripple Rejection: Effective ripple rejection, ensuring a stable output voltage.
- Compact Packages: Available in TO-92 and SOIC-8 packages, suitable for various application needs.
Applications
The MC79L12ACPRA is versatile and can be used in a variety of applications, including:
- Power Supplies: For generating stable negative voltages in power supply circuits.
- Audio Equipment: To provide negative voltage rails in audio amplifiers and other audio equipment.
- Industrial Control Systems: For powering components that require negative voltages in industrial control systems.
- Medical Devices: In medical equipment that requires stable and reliable negative voltage supplies.
- Automotive Electronics: For use in automotive systems that need robust and reliable voltage regulation.
Q & A
- What is the output voltage of the MC79L12ACPRA?
The output voltage of the MC79L12ACPRA is -12V.
- What is the maximum output current of the MC79L12ACPRA?
The maximum output current is 100 mA.
- What are the key protection features of the MC79L12ACPRA?
The device features thermal overload protection and internal short circuit protection.
- What is the dropout voltage of the MC79L12ACPRA at 40 mA output current?
The dropout voltage is 1.7 V at 40 mA output current.
- What is the operating junction temperature range of the MC79L12ACPRA?
The operating junction temperature range is from 0°C to 125°C.
- What are the available package types for the MC79L12ACPRA?
The device is available in TO-92 and SOIC-8 packages.
- What is the ripple rejection of the MC79L12ACPRA?
The ripple rejection is typically 42 dB at 120 Hz.
- What is the storage temperature range for the MC79L12ACPRA?
The storage temperature range is from -65°C to 150°C.
- How do I ensure stable operation of the MC79L12ACPRA?
Ensure that the input voltage remains at least 2.0 V above the output voltage, and use appropriate capacitors (CI and CO) for stability and transient response.
- What are some common applications of the MC79L12ACPRA?
Common applications include power supplies, audio equipment, industrial control systems, medical devices, and automotive electronics.
