ZSR400CL

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The ZSR400CL is a linear voltage regulator from Diodes Incorporated\'s well-known Zetex family of products. It is designed to provide an adjustable output voltage, controlled by an external voltage reference, for low power applications such as laptops, GPS systems and cellphones. The ZSR400CL has an adjustable output voltage range of 3.3V to 36V and supports a maximum current of 200mA, making it well-suited to a variety of power delivery applications where a reliable, low power output is required. The device also includes a built-in thermal shutdown feature which protects it from overheating, as well as an anti-reverse protection circuit which prevents reverse current flow.

The ZSR400CL works by utilizing an internal voltage reference and operational amplifier. The voltage necessary to maintain the output voltage is divided in half by a resistive voltage divider. The divided voltage is compared to the voltage reference with the operational amplifier. If the difference exceeds a specific amount, then the output voltage is adjusted accordingly. The amount of adjustment is determined by one of two resistors connected to the output, which set the voltage sensing gain.

When using the ZSR400CL voltage regulator, all power delivery systems must provide the regulator with extremely low noise and stable power sources. Ensuring a low noise power delivery system is critical to avoid disturbances in the feedback loop of the voltage regulator, causing it to output inaccurate voltage levels. To maintain the necessary low noise level for the ZSR400CL, it is recommended to design a power supply with a power factor correction circuit, a high voltage input filter, and a low voltage output filter.

Applications areas for the ZSR400CL include but are not limited to: audio amplifiers, CCTV surveillance systems, personal computers, game consoles, LCD/LED displays, and cellular phone base stations. It is also suitable for use in automotive and other transportation systems.

Overall, the ZSR400CL is an excellent choice for many low power applications requiring reliable, adjustable voltage regulation. Its adjustable output voltage provides greater flexibility than many other linear regulators, and its built-in protection features help ensure a long lifespan and protection from damage. Additionally, its low noise power delivery requirements make it an excellent fit for many applications with stringent requirements for low noise operation.

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