Overview
The MC79L05ABP is a fixed negative-voltage linear regulator from ON Semiconductor, designed to provide a stable -5V output voltage. This regulator is part of the MC79L00A series 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 dropout voltage, and internal current-limiting and thermal-shutdown features, making it immune to overload conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | -4.6 | -5 | -5.4 | Vdc |
| Input Voltage Range | -7 | -20 | Vdc | |
| Output Current | 100 | mA | ||
| Dropout Voltage (IO = 40 mA, TJ = +25°C) | 1.7 | Vdc | ||
| Input Regulation (TJ = +25°C) | 150 | 200 | mV | |
| Ripple Rejection (f = 120 Hz) | 40 | 49 | dB | |
| Operating Temperature Range | -40 | 125 | °C | |
| Package Type | TO-92 (Pb-Free) |
Key Features
- Stable Output Voltage: Provides a stable -5V output voltage, ensuring consistent power supply to electronic circuits.
- Low Dropout Voltage: Offers a low dropout voltage of 1.7V, enhancing efficiency in voltage regulation.
- Internal Current Limiting and Thermal Shutdown: Protects the regulator from overload and thermal stress, making it reliable in various applications.
- Compact Package: Housed in a TO-92 package, making it easy to integrate into circuit designs.
- Low Quiescent Current: Operates with low quiescent current, minimizing power consumption.
Applications
- Dual Power Supply Systems: Often used in conjunction with positive voltage regulators like the MC78L05ABP to provide stable positive and negative voltage outputs.
- Low-Power Electronic Devices: Ideal for powering low-power electronic devices, microcontrollers, and sensor circuits that require a stable negative voltage supply.
- Embedded Systems and Portable Electronics: Suitable for embedded systems and portable electronics applications where a reliable negative voltage supply is necessary.
Q & A
- Q: What is the maximum output current of the MC79L05ABP?
A: The MC79L05ABP can deliver a continuous output current of up to 100 mA.
- Q: What is the typical dropout voltage of the MC79L05ABP?
A: The typical dropout voltage is 1.7 V.
- Q: What is the operating temperature range of the MC79L05ABP?
A: The operating temperature range is from -40°C to +125°C.
- Q: What package types are available for the MC79L05ABP?
A: The MC79L05ABP is available in TO-92 (Pb-Free) packages.
- Q: Does the MC79L05ABP have internal protection features?
A: Yes, it has internal current-limiting and thermal-shutdown features to protect against overload and thermal stress.
- Q: How does the MC79L05ABP improve output impedance compared to a Zener-diode and resistor combination?
A: It provides an effective improvement in output impedance of two orders of magnitude with lower bias current.
- Q: What is the ripple rejection of the MC79L05ABP at 120 Hz?
A: The ripple rejection at 120 Hz is typically 49 dB.
- Q: Can the MC79L05ABP be used in dual power supply applications?
A: Yes, it can be used in conjunction with positive voltage regulators to provide stable positive and negative voltage outputs.
- Q: What are some common applications of the MC79L05ABP?
A: It is commonly used in low-power electronic devices, microcontrollers, sensor circuits, embedded systems, and portable electronics.
- Q: How should the MC79L05ABP be connected in a circuit?
A: Connect the input voltage to the Input pin, the Ground pin to the circuit ground, and the Output pin will provide the regulated -5V output.
