Overview
The MC7912ACTG is a negative voltage regulator from onsemi, part of the MC7900 series. This regulator is designed to provide a fixed negative output voltage of -12V and is capable of delivering up to 1.0 A of current. It is a complement to the popular MC7800 series and is available in various voltage options. The MC7912ACTG features current limiting, thermal shutdown, and safe-area compensation, making it robust and reliable under most operating conditions.
Key Specifications
| Characteristics | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | VO | -11.5 | -12 | -12.5 | Vdc |
| Line Regulation (TJ = +25°C, IO = 100 mA) | Regline | -14.5 | - | -16 | Vdc |
| Load Regulation (TJ = +25°C, 5.0 mA ≤ IO ≤ 1.5 A) | Regload | - | - | 46 | mV |
| Input Bias Current (TJ = +25°C) | IIB | - | 4.4 | 8.0 | mA |
| Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) | Vn | - | - | 75 | μV |
| Ripple Rejection (IO = 20 mA, f = 120 Hz) | RR | - | - | 61 | dB |
| Dropout Voltage (IO = 1.0 A, TJ = +25°C) | VI−VO | - | - | 1.3 | Vdc |
| Average Temperature Coefficient of Output Voltage | ΔVO/ΔT | - | - | -1.0 | mV/°C |
Key Features
- Fixed Negative Output Voltage: Provides a stable -12V output voltage.
- High Current Capability: Can deliver up to 1.0 A of current.
- Current Limiting and Thermal Shutdown: Protects the device from overcurrent and overheating conditions.
- Safe-Area Compensation: Ensures stable operation under various load conditions.
- Low Dropout Voltage: Maintains regulation with a dropout voltage of 1.3V.
- High Ripple Rejection: Offers a ripple rejection of 61 dB at 120 Hz.
- ESD Protection: Exceeds Human Body Model 2000 V and Machine Model 200 V tests.
Applications
- Power Supplies: Used in negative voltage power supply systems.
- Industrial Control Systems: Suitable for industrial control and automation applications.
- Telecommunications: Employed in telecommunications equipment requiring stable negative voltages.
- Medical Devices: Used in medical equipment that requires reliable negative voltage regulation.
- Aerospace and Defense: Applied in aerospace and defense systems where high reliability is crucial.
Q & A
- What is the output voltage of the MC7912ACTG?
The output voltage of the MC7912ACTG is -12V.
- What is the maximum current the MC7912ACTG can deliver?
The MC7912ACTG can deliver up to 1.0 A of current.
- What are the key protection features of the MC7912ACTG?
The MC7912ACTG features current limiting, thermal shutdown, and safe-area compensation.
- What is the dropout voltage of the MC7912ACTG?
The dropout voltage of the MC7912ACTG is 1.3V.
- How does the MC7912ACTG perform in terms of ripple rejection?
The MC7912ACTG offers a ripple rejection of 61 dB at 120 Hz.
- Does the MC7912ACTG have ESD protection?
Yes, the MC7912ACTG exceeds Human Body Model 2000 V and Machine Model 200 V tests for ESD protection.
- What is the average temperature coefficient of the output voltage?
The average temperature coefficient of the output voltage is -1.0 mV/°C.
- What are some common applications of the MC7912ACTG?
The MC7912ACTG is commonly used in power supplies, industrial control systems, telecommunications, medical devices, and aerospace and defense systems.
- What is the input bias current of the MC7912ACTG?
The input bias current of the MC7912ACTG is typically 4.4 mA.
- How does the MC7912ACTG handle load regulation?
The MC7912ACTG has a load regulation of up to 46 mV for currents between 5.0 mA and 1.5 A.
