LX8386B-33CP

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LX8386B-33CP is a voltage regulator, belong to a type of low power linear voltage regulators. It provides over-current and over-voltage protection to the system under the assistance of the shunt reference comparator. It usually works in a 15V to 33V input voltage range and provides a fixed voltage output of 3.3V.

Wildly applied in the automotive, industrial and consumer applications such as ADAS, computer, server, Storage and Network, the power supply of LX8386B-33CP is adjustable with its built-in soft-start circuit. That is to say, the peak current starts from zero to the regulated current when system is turned on. It provide the output with high accuracy, up to 0.2% voltage regulation, with excellent load and line regulation feature. It also offers very low output voltage ripple.

To well protect the system, LX8386B-33CP integrates a thermal foldback protection, a hiccup over-current shut down protection, as well as a soft over voltage protection, also with an adjustable output voltage limit. Additionally, with its high precision bandgap reference and feedback amplifier, it ensures high accuracy, good line/load regulation and fast transient response. For more, it has very low ripple voltage besides.

The working principle of LX8386B-33CP is relatively simple. It compares the output voltage with the ground voltage and voltage reference extracted from its internal bandgap reference. If the output voltage is higher than the reference and ground, the internal comparator outputs a high to keep the PWM convergence ramp in its low state, which will reduce the duty cycle of the pulse width modulator. Until the output voltage goes lower than the reference, the PWM convergence ramp output then goes high to increase the duty cycle. This process will repeat, which form the basic operation of LX8386B-33CP voltage regulator.

In conclusion, LX8386B-33CP is a very good choice of low power linear voltage regulator, in terms of features as well as performance. It offers advanced protection features and high accuracy voltage output, and at the same time eliminate the need for external components for soft start and over-voltage protection.

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