LM2937ES-15/NOPB

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Introduction of LM2937ES-15/NOPB

The LM2937ES-15/NOPB is a three-terminal voltage regulators with an adjustable output voltage. It is classified as a PMIC -- Voltage Regulators -- Linear. The device has low drop out voltage, enabling operation from 4.5V input. It also operates with full load at temps as high as 125 ° C. It is also package in the exact plastic TO-92 as the device it replaces, making this a direct replacement part with minimal design changes. It also has better noise immunity, higher efficiency, and low quiescent current.

Application Field

The application scope of LM2937ES-15/NOPB covers many areas such as power supplies, logic power, automotive, peripherals, telecommunications and other electronic circuits. One type of field is Automotive Applications, which typically require stable voltage and current. The LM2937ES-15/NOPB can be used as a voltage reference in control circuits, such as fuel injection and transmission control systems. Other automotive applications include clock oscillators, engine speed regulators, closed-loop or open-loop systems, etc.

Another application field is Audio and Video Equipment. This includes voltage regulation for sophisticated audio and video equipment, such as CD players and DVD players. The LM2937ES-15/NOPB is ideal for these applications due to its low noise and high accuracy. Plus, its compact package allows for a small space footprint.

Other applications include measurement and control instruments, measuring instruments, medical systems, telecommunications, IOT systems, etc. The LM2937ES-15/NOPB can provide voltage regulation with reliable power supply.

Working Principle

The LM2937ES-15/NOPB is a linear voltage regulator. It operates by controlling the voltage across a series pass transistor, which has at least one junction that acts as a voltage reference. This voltage reference is connected to the output of the regulator, so that the output voltage is regulated to this set point. When the input voltage is greater than the reference voltage, the pass transistor is turned on and the current flows, thus regulating the output voltage. When the input voltage is lower than the reference voltage, the pass transistor is turned off, stopping the current from flowing and thus regulating the output voltage.

To ensure the regulation of the output voltage, the gain of the reference junction of the pass transistor must be greater than the input voltage. This means that the reference junction must be able to maintain the required minimum voltage to ensure the output voltage is stable. The LM2937ES-15/NOPB has an adjustable output voltage and this can be adjusted by changing the external resistors connected to the feedback pin.

Conclusion

The LM2937ES-15/NOPB is a three-terminal voltage regulator dedicated to providing a stable and reliable output voltage. It is classified as a PMIC - Voltage Regulators - Linear and its applications span across automotive, audio and video equipment, measuring and control instruments, medical systems, telecommunications, and other IOT systems. The device operates by means of a series pass transistor with a reference voltage connected to the output, which is regulated to a required set point. The LM2937ES-15/NOPB provides low noise and high accuracy, making it the perfect choice for any system requiring reliable power.

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