Overview
The MC7812ACD2TR4G is a fixed-voltage regulator from onsemi, designed to provide a stable output voltage of 12 volts. This monolithic integrated circuit is part of the MC78XX series, which is widely used for local, on-card regulation in various electronic systems. The device is capable of delivering output currents in excess of 1.0 A with adequate heatsinking, making it suitable for high-current applications.
The MC7812ACD2TR4G features internal current limiting, thermal shutdown, and safe-area compensation, ensuring reliable operation under diverse conditions. It can also be used with external components to achieve adjustable voltages and currents, enhancing its versatility.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | VO | 11.75 | 12 | 12.25 | Vdc |
| Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W) | VO | 11.5 | 12 | 12.5 | Vdc |
| Line Regulation (14.8 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA) | Regline | - | - | 3.8 | mV |
| Load Regulation (5.0 mA ≤ IO ≤ 1.5 A) | Regload | - | - | 1.6 | mV |
| Quiescent Current | IB | 3.4 | - | 8.0 | mA |
| Dropout Voltage (IO = 1.0 A, TJ = 25°C) | VI - VO | - | - | 2.0 | Vdc |
| Output Noise Voltage (10 Hz ≤ f ≤ 100 kHz) | Vn | - | - | 10 | μV/VO |
| Output Resistance (f = 1.0 kHz) | rO | - | - | 1.1 | mΩ |
| Short Circuit Current Limit (TA = 25°C) | ISC | - | - | 0.2 | A |
| Peak Output Current (TJ = 25°C) | Imax | - | - | 2.2 | A |
| Average Temperature Coefficient of Output Voltage | TCVO | - | - | -0.8 | mV/°C |
Key Features
- High Output Current: Capable of delivering output currents in excess of 1.0 A with adequate heatsinking.
- Internal Protection: Features internal current limiting, thermal shutdown, and safe-area compensation for reliable operation.
- No External Components Required: Can operate without external components for fixed voltage regulation.
- Adjustable Voltage and Current: Can be used with external components to achieve adjustable voltages and currents.
- Low Dropout Voltage: Dropout voltage of 2.0 Vdc at IO = 1.0 A, TJ = 25°C.
- Low Output Noise: Output noise voltage of 10 μV/VO over the frequency range of 10 Hz to 100 kHz.
Applications
- Local and On-Card Regulation: Ideal for local voltage regulation on PCBs, reducing noise and improving overall system stability.
- Power Supplies: Used in power supply units to provide stable and regulated output voltages.
- Industrial and Automotive Systems: Suitable for use in industrial and automotive applications where reliable voltage regulation is critical.
- Consumer Electronics: Found in various consumer electronics requiring stable DC power supplies.
Q & A
- What is the output voltage of the MC7812ACD2TR4G?
The output voltage of the MC7812ACD2TR4G is 12 volts.
- What is the maximum output current of the MC7812ACD2TR4G?
The maximum output current is in excess of 1.0 A with adequate heatsinking.
- Does the MC7812ACD2TR4G require external components for operation?
No, it can operate without external components for fixed voltage regulation.
- What are the key protection features of the MC7812ACD2TR4G?
The device features internal current limiting, thermal shutdown, and safe-area compensation.
- What is the dropout voltage of the MC7812ACD2TR4G?
The dropout voltage is 2.0 Vdc at IO = 1.0 A, TJ = 25°C.
- What is the output noise voltage of the MC7812ACD2TR4G?
The output noise voltage is 10 μV/VO over the frequency range of 10 Hz to 100 kHz.
- What is the quiescent current of the MC7812ACD2TR4G?
The quiescent current is 3.4 mA to 8.0 mA.
- What are some common applications of the MC7812ACD2TR4G?
Common applications include local and on-card regulation, power supplies, industrial and automotive systems, and consumer electronics.
- What is the average temperature coefficient of output voltage for the MC7812ACD2TR4G?
The average temperature coefficient of output voltage is -0.8 mV/°C.
- What is the short circuit current limit of the MC7812ACD2TR4G?
The short circuit current limit is 0.2 A at TA = 25°C.
