Overview
The MC7912CTG is a negative voltage regulator from onsemi, designed to provide a stable and regulated output voltage. This component is part of the MC7900 series, which offers a range of fixed output voltage options. The MC7912CTG specifically provides an output voltage of -12V, making it suitable for various applications requiring negative voltage regulation.
This regulator features current limiting, thermal shutdown, and safe-area compensation, ensuring reliable operation under different load conditions. It is also equipped with ESD protection, exceeding the Human Body Model and Machine Model tests, enhancing its durability and reliability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | -11.5 | -12 | -12.5 | Vdc |
| Line Regulation (TJ = +25°C, IO = 100 mA) | -14.5 Vdc ≥ VI ≥ -30 Vdc | -16 Vdc ≥ VI ≥ -22 Vdc | - | mV |
| Load Regulation (TJ = +25°C, 5.0 mA ≤ IO ≤ 1.5 A) | - | - | 46 | mV |
| Input Bias Current (TJ = +25°C) | - | 4.4 | 8.0 | mA |
| Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) | - | - | 75 | μV |
| Ripple Rejection (IO = 20 mA, f = 120 Hz) | - | - | 61 | dB |
| Dropout Voltage (IO = 1.0 A, TJ = +25°C) | - | - | 1.3 | Vdc |
| Average Temperature Coefficient of Output Voltage | - | - | -1.0 | mV/°C |
| Output Current | - | - | 1.0 | A |
Key Features
- Fixed Output Voltage: Provides a stable output voltage of -12V.
- Current Limiting: Protects the regulator from overcurrent conditions.
- Thermal Shutdown: Automatically shuts down the regulator in case of overheating.
- Safe-Area Compensation: Ensures stable operation over a wide range of input and output conditions.
- ESD Protection: Exceeds Human Body Model and Machine Model tests for enhanced durability.
- Low Dropout Voltage: Typically 1.3V at 1A output current.
- High Ripple Rejection: 61 dB at 120 Hz, ensuring minimal noise at the output.
Applications
- Power Supplies: Used in power supply units requiring negative voltage regulation.
- Industrial Control Systems: Suitable for systems that need stable negative voltage outputs.
- Medical Equipment: Can be used in medical devices that require precise voltage regulation.
- Aerospace and Defense: Applicable in various military and aerospace applications where reliable voltage regulation is critical.
- Telecommunications: Used in telecom equipment to provide stable negative voltage outputs.
Q & A
- What is the output voltage of the MC7912CTG?
The output voltage of the MC7912CTG is -12V.
- What are the key protection features of the MC7912CTG?
The MC7912CTG features current limiting, thermal shutdown, and safe-area compensation.
- What is the maximum output current of the MC7912CTG?
The maximum output current is 1A.
- What is the dropout voltage of the MC7912CTG?
The dropout voltage is typically 1.3V at 1A output current.
- What is the ripple rejection of the MC7912CTG?
The ripple rejection is 61 dB at 120 Hz.
- Does the MC7912CTG have ESD protection?
Yes, it exceeds Human Body Model and Machine Model tests.
- 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 MC7912CTG?
Common applications include power supplies, industrial control systems, medical equipment, aerospace and defense, and telecommunications.
- What is the input bias current of the MC7912CTG?
The input bias current is typically 4.4 mA.
- What is the output noise voltage of the MC7912CTG?
The output noise voltage is typically 75 μV over the frequency range of 10 Hz to 100 kHz.
