Overview
The MC79L12ABDR2 is a part of the MC79L00A Series of negative voltage regulators produced by onsemi. These regulators are designed to provide a fixed negative output voltage and are suitable for a wide range of applications requiring up to 100 mA of current. They are known for their ease of use, internal current-limiting, and thermal-shutdown features, making them immune to overload conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Nominal Output Voltage | -11.5 | -12 | -12.5 | Vdc |
| Input Voltage Range | -14.5 | - | -27 | Vdc |
| Load Regulation (1.0 mA ≤ IO ≤ 100 mA) | - | - | 200 | mV |
| Load Regulation (1.0 mA ≤ IO ≤ 40 mA) | - | - | 100 | mV |
| Dropout Voltage (IO = 40 mA, TJ = +25°C) | - | - | 1.7 | Vdc |
| Input Bias Current (TJ = +25°C) | - | - | 6.5 | mA |
| Output Noise Voltage (10 Hz ≤ f ≤ 100 kHz) | - | - | 80 | µV |
| Ripple Rejection (f = 120 Hz, TJ = +25°C) | 31 | - | 47 | dB |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package | - | - | SOIC-8 (Pb-Free) | - |
Key Features
- Fixed negative output voltage (-12V for MC79L12ABDR2)
- Internal current-limiting and thermal-shutdown features for overload protection
- Low dropout voltage (1.7 Vdc at IO = 40 mA)
- High ripple rejection (31 dB to 47 dB at f = 120 Hz)
- Low output noise voltage (80 µV over 10 Hz to 100 kHz)
- Operating temperature range from -40°C to +125°C
- Pb-Free SOIC-8 package
Applications
- General purpose power supplies requiring negative voltages
- Replacement for Zener-diode and resistor combinations to improve output impedance
- Industrial control systems
- Automotive electronics
- Consumer electronics requiring stable negative voltage supplies
Q & A
- What is the nominal output voltage of the MC79L12ABDR2?
The nominal output voltage is -12V.
- What is the input voltage range for the MC79L12ABDR2?
The input voltage range is from -14.5 Vdc to -27 Vdc.
- What is the dropout voltage at 40 mA output current?
The dropout voltage is 1.7 Vdc at IO = 40 mA.
- What are the thermal protection features of the MC79L12ABDR2?
The device features internal current-limiting and thermal-shutdown for overload protection.
- What is the operating temperature range of the MC79L12ABDR2?
The operating temperature range is from -40°C to +125°C.
- What package type is the MC79L12ABDR2 available in?
The MC79L12ABDR2 is available in a Pb-Free SOIC-8 package.
- What is the ripple rejection of the MC79L12ABDR2?
The ripple rejection is between 31 dB and 47 dB at f = 120 Hz.
- What is the output noise voltage of the MC79L12ABDR2?
The output noise voltage is 80 µV over the frequency range of 10 Hz to 100 kHz.
- Can the MC79L12ABDR2 replace a Zener-diode and resistor combination?
Yes, it can provide an effective improvement in output impedance compared to a Zener-diode and resistor combination.
- What are some common applications of the MC79L12ABDR2?
Common applications include general purpose power supplies, industrial control systems, automotive electronics, and consumer electronics requiring stable negative voltage supplies.
