L9758

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The L9758 is a special purpose voltage regulator designed and made by STMicroelectronics. It is ideal for Automotive applications and provides up to 30W of safe, efficient power for a wide range of integrated circuits and applications requiring 5V outputs. In this article, we will look at the L9758’s application field and working principle.

Application Field

The L9758 is designed for applications where a precise 5V output voltage is necessary, such as automotive ECUs, automated test equipment, and instrumentation systems. The device\'s tight voltage regulation tolerance, low quiescent current, and wide operating temperature range make it suitable for a variety of automotive, industrial, and medical applications. Furthermore, the device features overvoltage and overcurrent protection, as well as short-circuit and thermal shutdown, to ensure safe and reliable operation in the field.

Working Principle

The L9758 is a synchronous buck regulator with a buck controller and two high-side and two low-side MOSFETs. It has an input voltage range of 4.5V to 18V and an output voltage of 5V ±5%. The regulator is designed to be a variable frequency, current mode regulator with pulse-skipping for light-load efficiency. It supports PFM (pulse frequency modulation) and PWM (pulse width modulation) operation for adaptability to different operation speeds.

The device has an adjustable current limit to protect it from overcurrent situations and shut down automatically if a short circuit occurs. It also has a thermal shutdown protection to protect the device in case of thermal overload. The L9758 also supports Auto Recovery Short-circuit Protection (ARSP), which will restart the device automatically once the fault is removed.

In conclusion, the L9758 is an ideal voltage regulator for Automotive applications. It has an adjustable current limit and overvoltage and overcurrent protection, as well as short-circuit and thermal shutdown, which ensure safe and reliable operation in the field. The device\'s tight voltage regulation tolerance, low quiescent current, and wide operating temperature range make it suitable for a variety of automotive, industrial, and medical applications. The device\'s working principle and application field have been examined in this article.

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