LT4180EGN#TRPBF

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LT4180EGN#TRPBF is a novel power supply controller, monitor and supervisor fuse load switch. It is designed to make sure safe, reliable and correct power supply in various industrial applications. This device integrates a high-side power MOSFET switch and an integrated current-sense amplifier along with an integrated voltage supervisor and power-on reset/start-up delay circuitry, which allows users to monitor both the voltage and the current. Therefore, its application field and working principle become be of great significance.

The LT4180EGN#TRPBF is available in an 8-lead thermally-enhanced TSSOP packages, making it a perfect choice for space-constrained, portable applications. The device offers 1.5A continuous-output current and 32V maximum maximum voltage ratings. The device also has two output monitor pins in the form of an IOUT pin and a VOUT pin. The IOUT pin provides the output current and can be used to set a current limit to protect the load. The VOUT pin can be used to monitor the output voltage, providing the user with an ability to detect any over-voltage, under-voltage, or output-voltage instability conditions.

The LT4180EGN#TRPBF operates in two modes: the standby mode and the active mode. In the standby mode the power MOSFET is disabled and the device draws little quiescent current, allowing for low-power operation. In the active mode, the power MOSFET is at full conduction and the device enters a regulated state, which enables fast switching and regulated output. When the power is turned on, the device starts up in the standby mode and requires a rising voltage on the EN pin to activate the power MOSFET.

In addition to the power MOSFET, the LT4180EGN#TRPBF also integrates a current-sense amplifier, which amplifies the voltage drop across the current-sense resistor connected across the power MOSFET source. By monitoring the output current with the IOUT pin, the amplifier allows the user to set a current limit that protects the load in case of an over-current condition. Furthermore, the device has a high-voltage monitoring pin (VOUT) used to detect any over-voltage, under-voltage, or output-voltage instability conditions. The high-voltage monitoring output is available at the VOUT pin and can be used to trigger an external controller.

The LT4180EGN#TRPBF also integrates a power-on reset/start-up delay circuitry which provides a delayed turn-on delay circuit and an over-temperature protection circuit, allowing the user to program the turn-on delay time and the over-temperature threshold—ensuring that the device operates within its safe operating region. Lastly, the device integrates a thermal fuse protection circuit, ensuring safe operation under extreme power dissipation and preventing the device from failing due to excessive power dissipation.

In conclusion, the LT4180EGN#TRPBF is an effective power supply controller, monitor, and supervisor fuse-load switch. Its application fields involve various industrial applications, ranging from automotive to aircraft applications, and it provides a safe, reliable and correct power supply. Moreover, the device offers fast switching, a current-sense amplifier, a high-voltage monitoring, power-on reset/start-up delay circuitry, and thermal fuse protection circuit, all of which make the device a perfect choice for space-constrained, portable applications.

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