L9455

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PMIC – Voltage Regulators – Special Purpose

L9455 Application Field and Working Principle

The L9455 is a multipurpose integrated circuit specifically designed by STMicroelectronics to act as a voltage regulator, designed to regulate the voltage along a series of channels. The regulator is able to be adjusted and adapt to the exact input voltage requirement, to the exact output voltage desired, offering the flexibility needed for many applications.

Basic Operation

At its core, the L9455 works by comparing the input voltage to a constant reference voltage (which is adjustable). This difference is then amplified and used to drive a fold back current source.

The fold back current source then provides a controlled closed loop hiccup current to protect the output if the input voltage goes above a certain point. This is done by keeping a certain safety margin between the input voltage and the output voltage, to ensure that any overvoltage conditions can be safely handled.

The hiccup current then adjusts the output voltage, based on the current that it draws. If the current is too high, then the output voltage will be decreased, and vice versa.

Applications

The L9455 is designed to be used in a variety of applications where the input voltage and the output voltage need to be closely monitored and regulated. Most notably, the L9455 is suitable for use in applications that require a high degree of precision and accuracy. This includes applications such as automotive electronics, industrial automation and control, medical equipment, and many more.

By using the L9455, engineers can quickly and easily achieve a stable output voltage, regardless of the input voltage fluctuations. This makes the L9455 ideal for these types of applications, as it allows for a great deal of flexibility, as well as an increased level of safety.

Conclusion

The STMicroelectronics L9455 is a multipurpose integrated circuit that has been specifically designed to act as a voltage regulator. It works by comparing the input voltage to a constant reference voltage and adjusts its hiccup current accordingly to regulate the output voltage. The L9455 is suitable for use in a wide variety of automotive, industrial, medical, and many other applications.

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