Overview
The MC7908CT is a negative voltage regulator from onsemi, designed to provide a stable and regulated negative output voltage. It is part of the MC7900 series, which complements the popular MC7800 series. This regulator is suitable for applications requiring a reliable and efficient negative voltage supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage (TJ = +25°C) | -8.0 | -8.0 | -8.3 | Vdc |
| Input Voltage Range | -11.5 | -26 | V | |
| Output Current | 1.0 | A | ||
| Line Regulation (TJ = +25°C, IO = 100 mA) | -9.0 | -12.0 | Vdc | |
| Load Regulation (TJ = +25°C, 5 mA ≤ IO ≤ 1.0 A) | -4.0 | -80 | mV | |
| Quiescent Current (TJ = +25°C, IO = 0 mA) | 2.2 | 4.5 | mA | |
| Output Noise Voltage (10 Hz ≤ f ≤ 100 kHz, TJ = +25°C) | 52 | μV | ||
| Ripple Rejection (IO = 20 mA, f = 120 Hz, TJ = +25°C) | 56 | 71 | dB | |
| Dropout Voltage (IO = 1.0 A, TJ = +25°C) | 2.0 | Vdc | ||
| Average Temperature Coefficient of Output Voltage (0°C ≤ TJ ≤ +125°C, IO = 5.0 mA) | -0.6 | mV/°C | ||
| Operating Junction Temperature Range | 0 | +125 | °C | |
| Storage Temperature Range | -55 | +150 | °C |
Key Features
- Internal Thermal Shut Down Protection: Protects the device from overheating.
- Internal Short Circuit Current Limiting: Limits current in case of a short circuit.
- Epoxy Meets UL 94 V-0 Flammability Rating: Ensures the device meets safety standards for flammability.
- Halogen Free Available: Available with a halogen-free option upon request.
- Lead Free Finish/RoHS Compliant: Compliant with RoHS regulations for environmental safety.
- High Temperature Solder Exemption: Compliant with EU Directive Annex 7a for high-temperature soldering.
Applications
The MC7908CT is suitable for a variety of applications requiring a stable negative voltage supply, including:
- Power Supplies: For systems needing regulated negative voltages.
- Audio Equipment: To provide stable negative voltages for audio circuits.
- Industrial Control Systems: For reliable operation in industrial environments.
- Medical Devices: Where precise voltage regulation is critical.
- Automotive Systems: For use in automotive electronics requiring negative voltage supplies.
Q & A
- What is the output voltage of the MC7908CT?
The output voltage of the MC7908CT is typically -8.0 Vdc, with a range of -8.0 Vdc to -8.3 Vdc at TJ = +25°C. - What is the maximum output current of the MC7908CT?
The maximum output current is 1.0 A. - What is the input voltage range for the MC7908CT?
The input voltage range is from -11.5 V to -26 V. - Does the MC7908CT have thermal protection?
Yes, it has internal thermal shut down protection. - Is the MC7908CT RoHS compliant?
Yes, it is RoHS compliant with a lead-free finish. - What is the ripple rejection of the MC7908CT?
The ripple rejection is typically 71 dB at IO = 20 mA and f = 120 Hz. - What is the dropout voltage of the MC7908CT?
The dropout voltage is typically 2.0 Vdc at IO = 1.0 A and TJ = +25°C. - What is the operating junction temperature range of the MC7908CT?
The operating junction temperature range is from 0°C to +125°C. - Does the MC7908CT have short circuit protection?
Yes, it has internal short circuit current limiting. - Is the MC7908CT available in a halogen-free version?
Yes, it is available with a halogen-free option upon request.
