LTC4365CDDB-1

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  LTC4365CDDB-1 is a specialized power management IC (PMIC) for low-voltage application, especially designed for delivering precise voltage regulation in small, power sensitive, automotive applications.  The LTC4365CDDB-1 is optimized to regulate output voltage while consuming minimal current. It also provides high output accuracy in different conditions, and eliminates the need for external ICs in many cases. It utilizes an advanced charge-pump design to achieve adjustable output voltage with lowest electromagnetic interference (EMI).

  Application Field:

  The LTC4365CDDB-1 can be used in vehicle-to-grid (V2G) systems, such as those that support power delivery for vehicle charging stations and residential applications. It is also suitable for applications requiring precise voltage control over wide temperature range, and features soft-start, power-up sequencing, and output monitoring. Automotive driver supply circuits can take advantage of the chip\'s low quiescent current core (<1uA) capabilities. It can also be used in sectors where multiple boost/buck regulators are needed, such as automotive infotainment systems.

  Working Principle:

  The LTC4365CDDB-1 works on the basic principle of converting an input voltage to a regulated output voltage. The chip has two internal switches that switch on and off at different frequencies, allowing the chip to both increase and decrease the input voltage as needed. In order to maintain a constant and stable regulated voltage, the two switches are controlled by a feedback loop. The feedback loop monitors the output voltage and adjusts the frequency of the two switches appropriately so that the output voltage always remains at the desired level.

  The LTC4365CDDB-1 also utilizes a highly efficient charge pump topology to further improve its efficiency. This topology allows the chips to convert an input voltage to an output voltage with extremely low distortion and minimal power losses. This reduces the amount of heat generated, making it suitable for use in demanding applications.

  In addition to the voltage regulation, the chip also provides several features to ensure that the output voltage stays within safe limits and does not exceed the designed operating range. These features include an over-voltage protection, under-voltage protection and a temperature sensor. The over-voltage protection feature protects the chip in case of excessive input voltage, while the under-voltage protection feature shuts down the chip if the input voltage falls below a certain level. The temperature sensor monitors the internal temperature of the chip and shuts it down if it becomes too high. The chip also includes a power-on reset feature that ensures that the chip starts up in a safe condition every time.

  In conclusion, the LTC4365CDDB-1 is a specialized PMIC designed for low-voltage control applications. Its advanced charge-pump design allows it to regulate the output voltage while consuming minimal quiescent current. It also provides extra safety features such as over-voltage, under-voltage and temperature protection. The chip is suitable for use in automotive applications and sectors where multiple boost/buck regulators are required.  

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