Overview
The MC7905BTG is a negative voltage regulator from onsemi, designed as a complement to the popular MC7800 series. This three-terminal linear voltage regulator is available in a TO-220 package and is capable of delivering up to 1.0 A of output current. It features fixed output voltage options, in this case, -5.0 V, and includes several protective features such as current limiting, thermal shutdown, and safe-area compensation, making it robust under various operating conditions.
Key Specifications
| Characteristics | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | VO | -4.8 | -5.0 | -5.2 | Vdc |
| Line Regulation (TJ = +25°C, IO = 100 mA) | Regline | - | - | 7.0 | mV |
| Load Regulation (TJ = +25°C, 5.0 mA ≤ IO ≤ 1.5 A) | Regload | - | - | 11 | mV |
| Input Bias Current (TJ = +25°C) | IIB | - | 4.3 | 8.0 | mA |
| Output Noise Voltage (TA = +25°C, 10 Hz ≤ f ≤ 100 kHz) | Vn | - | - | 40 | μV |
| Ripple Rejection (IO = 20 mA, f = 120 Hz) | RR | - | - | 70 | 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 Output Voltage: The MC7905BTG provides a fixed output voltage of -5.0 V.
- High Current Capability: It can deliver up to 1.0 A of output current with adequate heatsinking.
- Protective Features: Includes current limiting, thermal shutdown, and safe-area compensation for robust operation.
- Low Dropout Voltage: A dropout voltage of 1.3 V at 1.0 A output current.
- High Ripple Rejection: Offers a ripple rejection of 70 dB at 120 Hz.
- Low Output Noise: Output noise voltage is 40 μV over the 10 Hz to 100 kHz frequency range.
Applications
- Power Supplies: Suitable for use in negative voltage power supplies requiring high current and low noise.
- Industrial Control Systems: Can be used in industrial control systems that require stable negative voltage regulation.
- Telecommunications Equipment: Applicable in telecommunications equipment where reliable negative voltage regulation is necessary.
- Medical Devices: Used in medical devices that require precise and stable negative voltage supplies.
Q & A
- What is the output voltage of the MC7905BTG?
The output voltage of the MC7905BTG is -5.0 V.
- What is the maximum output current of the MC7905BTG?
The MC7905BTG can deliver up to 1.0 A of output current with adequate heatsinking.
- What protective features does the MC7905BTG have?
The MC7905BTG includes current limiting, thermal shutdown, and safe-area compensation.
- What is the dropout voltage of the MC7905BTG at 1.0 A output current?
The dropout voltage is 1.3 V at 1.0 A output current.
- What is the ripple rejection of the MC7905BTG at 120 Hz?
The ripple rejection is 70 dB at 120 Hz.
- What is the output noise voltage of the MC7905BTG over the 10 Hz to 100 kHz frequency range?
The output noise voltage is 40 μV over the 10 Hz to 100 kHz frequency range.
- What is the average temperature coefficient of output voltage for the MC7905BTG?
The average temperature coefficient of output voltage is -1.0 mV/°C.
- What package type is the MC7905BTG available in?
The MC7905BTG is available in a TO-220 package.
- What are some common applications of the MC7905BTG?
Common applications include power supplies, industrial control systems, telecommunications equipment, and medical devices.
- What is the input voltage requirement for the MC7905BTG?
The input voltage must remain typically 2.0 V above the output voltage even during the high point of the input ripple voltage.
