Overview
The LM7915CT/NOPB is a 3-terminal negative voltage regulator from Texas Instruments, designed to provide a stable and reliable negative voltage output. This component is part of the LM79XX series, which includes regulators with fixed output voltages of -5V, -12V, and -15V. The LM7915CT/NOPB specifically offers a -15V output voltage and is packaged in the TO-220 power package, making it suitable for a variety of applications requiring negative voltage regulation.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Output Voltage | -15.0 | V |
| Output Current | 1.5 | A |
| Input Voltage | -35 | V |
| Input-Output Differential | 30 | V |
| Power Dissipation | Internally Limited | |
| Operating Junction Temperature Range | 0°C to +125°C | |
| Storage Temperature Range | -65°C to +150°C | |
| Lead Temperature (Soldering, 10 sec.) | 230°C | |
| Line Regulation | 5-100 mV | |
| Load Regulation | 15-200 mV | |
| Quiescent Current | 1.5-3 mA | |
| Output Noise Voltage | 300-375 μV | |
| Ripple Rejection | 54-70 dB @ 120 Hz | |
| Dropout Voltage | 1.1 V @ IOUT = 1 A |
Key Features
- Thermal Overload Protection: The LM7915CT/NOPB features thermal overload protection to prevent damage from excessive power dissipation.
- Internal Short Circuit Protection: This regulator includes internal short circuit protection, which limits the maximum current to protect the device.
- High Ripple Rejection: It offers high ripple rejection, ensuring a stable output voltage even with noisy input sources.
- Low Ground Pin Current: The low ground pin current allows the output voltage to be easily boosted above the preset value using a resistor divider.
- Stable Operation: The regulator requires only one external component, a compensation capacitor at the output, for stable operation.
Applications
The LM7915CT/NOPB is suitable for various applications requiring a stable negative voltage supply. These include:
- Power Supplies: For generating negative voltages in power supply systems.
- Audio Equipment: To provide a stable negative voltage for audio circuits.
- Industrial Control Systems: For powering components that require negative voltages in industrial control environments.
- Medical Devices: In medical equipment where stable negative voltages are necessary.
Q & A
- What is the output voltage of the LM7915CT/NOPB?
The output voltage of the LM7915CT/NOPB is -15V. - What is the maximum output current of the LM7915CT/NOPB?
The maximum output current is 1.5A. - What type of package does the LM7915CT/NOPB come in?
The LM7915CT/NOPB is packaged in the TO-220 power package. - What is the input voltage range for the LM7915CT/NOPB?
The input voltage range is up to -35V. - Does the LM7915CT/NOPB have thermal protection?
Yes, it features thermal overload protection. - What is the ripple rejection of the LM7915CT/NOPB?
The ripple rejection is 54-70 dB at 120 Hz. - What is the quiescent current of the LM7915CT/NOPB?
The quiescent current is 1.5-3 mA. - What is the dropout voltage of the LM7915CT/NOPB?
The dropout voltage is 1.1 V at IOUT = 1 A. - Is the LM7915CT/NOPB suitable for high-temperature environments?
Yes, it operates within a junction temperature range of 0°C to +125°C. - What external components are required for stable operation of the LM7915CT/NOPB?
Only one external component, a compensation capacitor at the output, is required for stable operation.
