LTC4419CMSE#PBF

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The LTC4419CMSE#PBF is a dual High-Side output supply, ideal diode controller from Linear Technology Corporation. It is a power management IC (PMIC), capable of operating at up to 40V, and providing up to 2A of current. The LTC4419CMSE#PBF includes an ideal diode, a current regulator and high-side switches for control, high-side protection and output short-circuit protection. It is also an OR controller, with an OR-in logic that can detect a low and turn on a high in one of its two lines.

The LTC4419CMSE#PBF has many applications where ideal diode, high-side switching and OR control are desired. In automotive applications, the device is often used as an auxiliary power supply for 12V and 24V systems, providing power from a 9V to 40V input source. It can also be used for power management in aviation, industrial and energy applications. In these applications, the device is capable of providing a continuous current up to 2A.

The device\'s integrated ideal diode replaces an external diode in the power supply, saving both PCB space and cost. This helps maximize power output while reducing power consumption and ensuring low noise and high efficiency. When an input voltage is above the output voltage, the ideal diode will forward bias, allowing current to flow between the input and output. Whereas, when the input voltage is below output, the device will block current, behaving like an open switch between the two.

The LTC4419CMSE#PBF has two high-side output switches, which are used for output switching and logic control. The internal logic sets current regulation thresholds for the high-side switches and then monitors the output of excess current. When the regulated current is exceeded, the output switch will turn off, allowing the device to monitor the input voltage from 9V to 40V. The high-side switches are also used for output short circuit (OC) protection. When an output short occurs, the high-side switches will turn off and remain off until the short is cleared.

In addition to the ideal diode and high-side switches, the OR controller section of the device is used to detect a low and turn on a high. This is done by comparing two lines to each other and turning on the higher input when the lower input is detected. When the lower line recovers, the OR controller turns off the higher line. This is used in applications where the two lines must remain in sync with each other.

Overall, the LTC4419CMSE#PBF combines the features of an ideal diode controller, OR controller, and high-side switch into one small package. By eliminating the need for an external diode, it helps save both space and cost on power management systems. Additionally, the device’s current regulation, OC protection, and OR control give it excellent performance in automotive, industrial, and energy applications.

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