LM337IMPX PMIC - Линейные стабилизаторы напряжения от Texas Instruments

The LM337IMPX is a versatile adjustable voltage regulator manufactured by Texas Instruments. It is designed to provide a negative voltage output, making it particularly useful in applications where a negative supply voltage is required. Here’s a detailed description of its features and specifications:

General Overview:

• Type: Adjustable Negative Voltage Regulator
• Manufacturer: Texas Instruments
• Package Type: Typically available in a TO-220 or similar package, which allows for efficient heat dissipation and easy mounting on a PCB.

Key Features:

• Output Voltage Range: The LM337 can provide an adjustable output voltage from -1.25V to -37V, depending on the external resistor configuration.
• Output Current: It can deliver up to 1.5A of output current, making it suitable for a variety of applications, including powering operational amplifiers, sensors, and other analog devices.
• Line Regulation: The device exhibits good line regulation, ensuring that variations in input voltage do not significantly affect the output voltage.
• Load Regulation: It maintains stable output voltage even with varying load conditions, which is crucial for sensitive electronic circuits.
• Thermal Protection: The LM337 includes built-in thermal overload protection, which prevents damage due to excessive heat.
• Short-Circuit Protection: It features short-circuit protection, ensuring that the device can withstand fault conditions without failure.

Electrical Characteristics:

• Input Voltage Range: The input voltage must be at least 3V more negative than the desired output voltage, with a maximum input voltage typically around -40V.
• Temperature Range: The operating temperature range is generally from -40°C to +125°C, making it suitable for industrial and automotive applications.
• Quiescent Current: The quiescent current is low, which helps in improving the overall efficiency of the power supply circuit.

Application Areas:

• Power Supply Circuits: Ideal for creating negative voltage rails in dual-supply systems.
• Signal Processing: Used in audio and signal processing applications where negative voltages are required.
• Regulated Power Supplies: Commonly found in laboratory power supplies and test equipment.

External Components:

To set the output voltage, the LM337 requires two external resistors (R1 and R2) connected in a voltage divider configuration. The output voltage can be calculated using the formula: [ V{OUT} = V{REF} \left(1 + \frac{R2}{R1}\right) + I{ADJ} \cdot R2 ] where ( V{REF ) is typically around 1.25V.

Conclusion:

The LM337IMPX from Texas Instruments is a robust and reliable adjustable negative voltage regulator that is widely used in various electronic applications. Its combination of adjustable output, thermal protection, and ease of use makes it a popular choice among engineers and designers looking to implement negative voltage solutions in their circuits.