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PMIC - OR Controllers, Ideal Diodes

The LT4351CMS#PBF is a highly integrated monolithic IC providing three high current N-channel MOSFET switches and advanced OR-controller and ideal diode functions, packaged in a thermally enhanced, low-profile ( 1.3mm maximum ) leadless MSOP-10 package with exposed pad. It is suitable for a range of power management applications needing high side, low side, and ORed switches.

Application Field

The LT4351CMS#PBF is an ideal solution for a variety of power management applications, including charging ports for buses, trucks, cars, boats, and other motor vehicles; heavy-duty generators; construction and agricultural equipment; as well as medical and industrial equipment and robotics.

It is an ideal switch for applications needing high current, low on-resistance, wide temperature range, and high reliability. The devices\' ability to trade off switching speed and conductor losses makes it the ideal choice for applications that require a switch with high reliability and low power dissipation.

The LT4351CMS#PBF can also be used in applications with multiple OR-controlled or ideal diodes, such as displays and LEDs. The OR-controller and ideal diode functions includes both voltage and current limiting capabilities, allowing the device to be used in applications that require multiple voltage and current sources.

Working Principle

The LT4351CMS#PBF is a monolithic IC that features three N-channel MOSFET switches and integrated advanced OR-controller and ideal diode functions. The device is designed with integrated smart OR-controller circuitry that provides optimal reverse current flows to ensure the circuit remains in a low loss state regardless of current flow. This feature reduces power dissipation, which in turn improves system reliability.

The integrated OR-controller also enables the device to switch between current flows, meaning that it can be used in applications that require both high side and low side switching. This flexibility makes the device ideal for applications with multiple sources of voltages and currents.

The LT4351CMS#PBF also includes an integrated ideal diode, which enables the device to limit voltage and current flows to different power sources. This feature makes the device ideal for applications that require multiple voltages and current sources, such as in displays and LEDs.

The device includes two N-Channel MOSFET switches and one P-Channel MOSFET switch with integrated ideal diode, enabling the device to switch between high side, low side and ORed switching. The device also features a wide operating temperature range, up to 105°C, and a high current rating, up to 9A.

Conclusion

The LT4351CMS#PBF is a highly integrated monolithic IC that provides three high current N-channel MOSFET switches and advanced OR-controller and ideal diode functions. It is suitable for a range of power management applications needing high side, low side, and ORed switches, as well as applications with multiple OR-controlled or ideal diodes, such as displays and LEDs. The device includes two N-Channel MOSFET switches and one P-Channel MOSFET switch with integrated ideal diode, the ideal diode limits voltage or current flows to different power sources, and the OR-controller circuitry provides optimal reverse current flow, thereby reducing power dissipation and improving system reliability.

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