The L7906CV is a fixed linear voltage regulator designed by STMicroelectronics, offering a regulated output voltage of -6V. It is part of the L78xx series of linear regulators, which are widely used for providing stable and precise output voltages in various electronic applications. The L7906CV is specifically designed to handle negative voltage regulation, making it suitable for circuits requiring a stable negative voltage supply.

## Key Specifications

## 1. General Description

- Type: Fixed Negative Voltage Regulator
- Output Voltage: -6V
- Package Types: Available in multiple packages, including TO-220, TO-3, and D2PAK

## 2. Electrical Characteristics

- Input Voltage (V_in):
- Maximum Input Voltage: -35V
- Recommended Input Voltage Range: -8V to -35V
- Output Voltage (V_out): -6V (fixed)
- Output Current (I_out):
- Maximum Output Current: 1.5A
- Continuous Output Current: Typically up to 1A
- Dropout Voltage (V_drop):
- Typical Dropout Voltage: 2V at 1A load
- Quiescent Current (I_q):
- Typical: 5 mA
- Ripple Rejection:
- Typical Ripple Rejection Ratio: 60 dB at 120 Hz
- Thermal Overload Protection: Integrated thermal shutdown to prevent overheating
- Short Circuit Protection: Includes internal current limiting to protect against short circuits

## 3. Performance Characteristics

- Line Regulation:
- Typical Line Regulation: 0.05%/V
- Load Regulation:
- Typical Load Regulation: 0.1%
- Temperature Coefficient:
- Typical: 0.8 mV/°C

## 4. Thermal Characteristics

- Operating Temperature Range: -40°C to +125°C
- Storage Temperature Range: -55°C to +150°C
- Thermal Resistance:
- Junction-to-Ambient: 65°C/W (typical for TO-220 package)
- Junction-to-Case: 5°C/W (typical for TO-220 package)

## 5. Pin Configuration

- TO-220 Package:
- Pin 1: Input (V_in)
- Pin 2: Ground (GND)
- Pin 3: Output (V_out)
- TO-3 Package:
- Pin 1: Input (V_in)
- Pin 2: Ground (GND)
- Pin 3: Output (V_out)
- D2PAK Package:
- Pin 1: Input (V_in)
- Pin 2: Ground (GND)
- Pin 3: Output (V_out)

## Applications

The L7906CV is suitable for various applications where a stable negative voltage is required. Common applications include:

- Power Supply Circuits: Used in power supply circuits where negative voltage is needed, such as analog and digital circuitry.
- Audio Equipment: Provides stable negative voltage for operational amplifiers and other audio components.
- Instrumentation: Utilized in instrumentation and measurement systems requiring precise negative voltage regulation.
- Consumer Electronics: Employed in consumer electronic devices where negative voltage is part of the power supply requirements.

## Advantages

- Stable Output Voltage: Delivers a precise -6V output voltage with minimal variation.
- High Current Capability: Can handle output currents up to 1.5A, suitable for a range of applications.
- Comprehensive Protection: Integrated thermal and short circuit protection enhances the reliability and durability of the device.
- Wide Input Voltage Range: Accepts a broad range of input voltages, providing flexibility in various circuit designs.
- Low Quiescent Current: Efficient operation with a low quiescent current of 5 mA, reducing power consumption.

## Conclusion

The STMicroelectronics L7906CV is a reliable and versatile fixed negative voltage regulator that provides a stable -6V output voltage. Its ability to handle up to 1.5A of output current, coupled with built-in protection features and a wide input voltage range, makes it suitable for a variety of electronic applications. Whether used in power supply circuits, audio equipment, or instrumentation, the L7906CV offers dependable performance and stability.