X40235S16I-BT1

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PMICs, or Power Management Integrated Circuits, are integrated circuits designed to reduce energy consumption and maximize the system’s performance while maintaining adequate output levels. Supervisors, like X40235S16I-BT1, are one of the many families of PMICs, and play a key role in providing power solutions.Part of the STMicro STMPS family of supervisors, the X40235S16I-BT1 supervisor device is a PMIC for 12V applications. It is a bipolar dual-channel, 3-MHz (max) fixed-frequency step-down regulator with an internal compensation network. The device is designed to achieve:1. Efficiency: low power consumption, high efficiency and high-quality output;2. Overcurrent Protection: built-in current limit circuitry to protect against short circuits;3. Robust Design: dynamic, adaptive loop gain to ensure stability;4. Enhanced Safety Features: integrated circuit protection from over-voltage, over-temperature, and under-voltage conditions;5. High Reliability: surface mount package for heat dissipation and enhanced reliability.The X40235S16I-BT1 application field includes digital and analog industrial systems, machine vision systems, display systems, automotive applications with 12V systems and applications featuring multiple outputs, among other uses.The X40235S16I-BT1 device’s working principle is based off of a buck converter. Working off of an input voltage, the buck converter reduces the voltage and steps up the current, allowing energy to flow from an input voltage source to the output load.The X40235S16I-BT1 contains two buck channels: one with a fixed output voltage (VOUT1) and one with an adjustable output voltage (VOUT2). It also contains two sense pins (VS2/VI2), which can be used to detect the load current, as well as a wide input voltage range (6V up to 25V). The device features:1. Low quiescent current with the standby mode disabled;2. Programmable soft-start and output voltage adjustment with the I2C interface;3. Differential remote voltage sensing with the VS2/VI2 pins;4. Dynamic and adaptive loop gain to improve transient stability;5. Over-voltage/over-temperature/under-voltage protection;6. Surface-mount package for improved heat dissipation;7. Adjustable switching frequency.The X40235S16I-BT1 is built to ensure high efficiencies of up to 94% under various load conditions. The inductor current is regulated by sensing the voltage at the drain of the internal power MOSFETs. A fraction of this voltage is compared to the input voltage while another fraction of the voltage is compared to a peak voltage reference, and the error signal is used to adjust the switching frequency and duty cycle.The X40235S16I-BT1 is designed to provide reliable, wide-input voltage range power in various industrial and automotive applications. Its low quiescent current, low thermal dissipation, over-voltage/over-temperature/under-voltage protection, and adjustable switching frequency make it suitable for a variety of applications.

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