Overview
The MC7812BD2TR4, produced by onsemi, is a member of the 78XX series of linear voltage regulators. These regulators are designed to provide a stable output voltage with minimal external components. The MC7812BD2TR4 specifically offers a fixed output voltage of 12 volts, making it suitable for a wide range of applications requiring a reliable and stable power supply.
This device is known for its high performance, including low dropout voltage, good line and load regulation, and a short-circuit current limit. It is also characterized by its low quiescent current, which makes it efficient in power consumption.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (TJ = 25°C) | VO | 11.5 | 12 | 12.5 | Vdc |
| Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W) | VO | 11.4 | 12 | 12.6 | Vdc |
| Line Regulation (TJ = 25°C) | Regline | - | - | 7.5 | mV |
| Load Regulation (TJ = 25°C) | 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 (TA = 25°C) | 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
- Fixed Output Voltage: The MC7812BD2TR4 provides a stable output voltage of 12 volts.
- Low Dropout Voltage: The device has a low dropout voltage, ensuring efficient operation even when the input voltage is close to the output voltage.
- Good Line and Load Regulation: It offers excellent line and load regulation, maintaining the output voltage stable across a range of input voltages and load currents.
- Short Circuit Current Limit: The regulator includes a short-circuit current limit to protect against overcurrent conditions.
- Low Quiescent Current: The device has a low quiescent current, which helps in reducing power consumption.
- High Ripple Rejection: It provides high ripple rejection, ensuring a clean output voltage even in noisy input conditions.
Applications
- Power Supplies: The MC7812BD2TR4 is commonly used in power supply circuits where a stable 12V output is required.
- Embedded Systems: It is suitable for use in embedded systems, microcontrollers, and other electronic devices that require a reliable power source.
- Automotive Electronics: The regulator can be used in automotive electronics due to its robust performance and ability to handle a wide range of operating temperatures.
- Industrial Control Systems: It is used in industrial control systems where stable voltage regulation is crucial for reliable operation.
Q & A
- What is the output voltage of the MC7812BD2TR4?
The output voltage of the MC7812BD2TR4 is 12 volts.
- What is the minimum input voltage required for the MC7812BD2TR4?
The minimum input voltage required is typically 2.0 volts above the output voltage, so for a 12V output, the minimum input voltage would be around 14 volts.
- What is the maximum output current of the MC7812BD2TR4?
The maximum output current is 1.0 ampere.
- Does the MC7812BD2TR4 have short-circuit protection?
Yes, the MC7812BD2TR4 includes a short-circuit current limit to protect against overcurrent conditions.
- What is the quiescent current of the MC7812BD2TR4?
The quiescent current is typically 3.4 mA.
- What is the dropout voltage of the MC7812BD2TR4?
The dropout voltage is typically 2.0 volts.
- What is the ripple rejection of the MC7812BD2TR4?
The ripple rejection is typically around 62 dB.
- What are the operating temperature ranges for the MC7812BD2TR4?
The operating temperature range is from 0°C to 125°C.
- Is the MC7812BD2TR4 suitable for automotive applications?
Yes, the MC7812BD2TR4 is suitable for automotive applications due to its robust performance and ability to handle a wide range of operating temperatures.
- What is the average temperature coefficient of output voltage for the MC7812BD2TR4?
The average temperature coefficient of output voltage is -0.8 mV/°C.
