Overview
The MC7905BD2T is a three-terminal negative voltage regulator IC produced by onsemi. This device is part of the MC7900 series, which offers fixed output voltage options ranging from -5.0 V to -24 V. The MC7905BD2T specifically provides a regulated output voltage of -5.0 V with a maximum current of 1 A. It is designed to ensure stable voltage regulation with features such as current limiting, thermal shutdown, and safe-area compensation, making it reliable for various electronic applications.
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 | - | -8.0 | mV |
| Load Regulation (TJ = +25°C) | Regload | 11 | - | 100 | 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 MC7905BD2T provides a fixed output voltage of -5.0 V.
- Current Limiting: Built-in current limiting to protect the device from overcurrent conditions.
- Thermal Shutdown: Automatic thermal shutdown to prevent overheating and potential 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 V at 1 A output current.
- High Ripple Rejection: Excellent ripple rejection of 70 dB at 120 Hz.
- ESD Protection: Exceeds Human Body Model 2000 V and Machine Model 200 V tests.
Applications
- Power Supplies: Used in power supply circuits requiring negative voltage regulation.
- Audio Equipment: Suitable for audio equipment that requires stable negative voltage supplies.
- Industrial Control Systems: Can be used in industrial control systems that need reliable negative voltage regulation.
- Medical Devices: Applicable in medical devices that require stable and regulated negative voltages.
- Automotive Electronics: Used in automotive electronics where negative voltage regulation is necessary.
Q & A
- What is the output voltage of the MC7905BD2T?
The output voltage of the MC7905BD2T is -5.0 V.
- What is the maximum output current of the MC7905BD2T?
The maximum output current of the MC7905BD2T is 1 A.
- Does the MC7905BD2T have built-in current limiting?
Yes, the MC7905BD2T has built-in current limiting to protect against overcurrent conditions.
- What is the dropout voltage of the MC7905BD2T at 1 A output current?
The dropout voltage of the MC7905BD2T at 1 A output current is 1.3 V.
- What is the ripple rejection of the MC7905BD2T at 120 Hz?
The ripple rejection of the MC7905BD2T at 120 Hz is 70 dB.
- Does the MC7905BD2T have ESD protection?
Yes, the MC7905BD2T exceeds Human Body Model 2000 V and Machine Model 200 V tests for ESD protection.
- What are the typical applications of the MC7905BD2T?
The MC7905BD2T is typically used in power supplies, audio equipment, industrial control systems, medical devices, and automotive electronics.
- What is the average temperature coefficient of output voltage for the MC7905BD2T?
The average temperature coefficient of output voltage for the MC7905BD2T is -1.0 mV/°C.
- Does the MC7905BD2T have thermal shutdown protection?
Yes, the MC7905BD2T has automatic thermal shutdown to prevent overheating and potential damage.
- What is the input bias current of the MC7905BD2T at 25°C?
The input bias current of the MC7905BD2T at 25°C is typically 4.3 mA to 8.0 mA.
