Overview
The MC7905BT is a negative voltage regulator from onsemi, designed to provide a stable and regulated negative output voltage. This three-terminal linear voltage regulator is part of the MC7900 series and is available in various fixed output voltage options. The MC7905BT specifically provides a regulated output voltage of -5.0 V. It features current limiting, thermal shutdown, and safe-area compensation, making it a reliable choice for various electronic applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | -4.9 | -5.0 | -5.1 | Vdc |
| Current - Output | 1.0 | A | ||
| Line Regulation (TJ = +25°C, IO = 100 mA) | 8.0 | mV | ||
| Load Regulation (TJ = +25°C, 5.0 mA ≤ IO ≤ 1.5 A) | 11 | mV | ||
| Input Bias Current (TJ = +25°C) | 4.3 | 8.0 | mA | |
| Dropout Voltage (IO = 1.0 A, TJ = +25°C) | 1.3 | Vdc | ||
| Ripple Rejection (IO = 20 mA, f = 120 Hz) | 70 | dB | ||
| Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) | 40 | μV | ||
| Average Temperature Coefficient of Output Voltage | -1.0 | mV/°C |
Key Features
- Fixed Output Voltage: The MC7905BT provides a regulated output voltage of -5.0 V.
- Current Limiting: Built-in current limiting to protect against overcurrent conditions.
- Thermal Shutdown: Automatic shutdown in case of overheating to prevent damage.
- Safe-Area Compensation: Ensures stable operation over a wide range of input and output conditions.
- Low Dropout Voltage: A dropout voltage of 1.3 Vdc at 1.0 A output current.
- High Ripple Rejection: Excellent ripple rejection of 70 dB at 120 Hz.
- Low Output Noise: Low output noise voltage of 40 μV over the frequency range of 10 Hz to 100 kHz.
Applications
The MC7905BT is suitable for a variety of applications requiring a stable negative voltage supply, including:
- Power supplies for electronic equipment.
- Audio and video equipment.
- Medical devices.
- Industrial control systems.
- Telecommunication equipment.
Q & A
- What is the output voltage of the MC7905BT?
The output voltage of the MC7905BT is -5.0 V. - What is the maximum output current of the MC7905BT?
The maximum output current is 1.0 A. - What are the key protection features of the MC7905BT?
The key protection features include current limiting, thermal shutdown, and safe-area compensation. - What is the dropout voltage of the MC7905BT at 1.0 A output current?
The dropout voltage is 1.3 Vdc at 1.0 A output current. - How does the MC7905BT handle ripple rejection?
The MC7905BT has an excellent ripple rejection of 70 dB at 120 Hz. - What is the output noise voltage of the MC7905BT?
The output noise voltage is 40 μV over the frequency range of 10 Hz to 100 kHz. - What is the average temperature coefficient of the output voltage?
The average temperature coefficient of the output voltage is -1.0 mV/°C. - Is the MC7905BT RoHS compliant?
Yes, the MC7905BT is lead-free and RoHS compliant. - What are some common applications of the MC7905BT?
Common applications include power supplies, audio and video equipment, medical devices, industrial control systems, and telecommunication equipment. - What are the input voltage requirements for the MC7905BT?
The input voltage must remain typically 2.0 V above the more negative output voltage even during the high point of the input ripple voltage.
