LM5068MM-4

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Power Management Integrated Circuit (PMIC) is an integrated circuit with multiple power management functions, such as voltage regulation, power sequencing, and current limiting. The LM5068MM-4 is a power management integrated circuit (PMIC) designed for hot-swap applications.

Introduction

The LM5068MM-4 is a hot-swap controller with a built-in intelligent current-foldback feature. It is designed to protect the hot-swap devices and the host circuit in hot-swap systems. This PMIC can be used in a wide range of applications, such as distributed power systems, server power supplies, and portable electronic devices.

The LM5068MM-4 is designed to be used in conjunction with a low-side MOSFET style power-switching device, typically an N-channel FET. It is capable of hot-swapping up to 4A in-rush current with an accuracy of ± 10%. The LM5068MM-4 comes in a 8-pin VSON (Vapor-Soft-Ordered-Network) package for easy integration into existing systems.

Application Field and Working Principle

The LM5068MM-4 is ideal for applications in which systems are powered on, powered off, and hot-swapped. It is ideally suited for applications that require a low-side MOSFET for battery-charging, voltage-regulation, current-regulation, and monitoring. It can be used in consumer electronics products, distributed powering systems, server supplies, portable devices, consumer power supplies, and an automotive environment.

The LM5068MM-4 employs a feedback loop current-foldback design to limit the in-rush current during hot-swapping. This is done to protect the system and the host device against unexpected power peaks due to a faulted load. When the system is powered-on, the average current will quickly ramp up to the output voltage desired by the host device. The LM5068MM-4 then senses this peak current and maintains it throughout the charging cycle. This current-foldback feature will ensure that the maximum current seen by the host circuit is kept within the acceptable levels.

The LM5068MM-4 offers various integrated features, such as: current limiting, over-voltage/under-voltage protection, reverse-current protection, over-temperature protection, and other safety features. The LM5068MM-4 also offers integral protection for the MOSFET, eliminating the need for an external component.

The LM5068MM-4 includes a power-on signal, which is used to indicate the current status of the output voltage. The signal is used to signal the host board of the power-on/off condition and switch-on/off cycles. It is also used as an indication of low voltage conditions, such as brown-out, soft-start, and power-down events.

In addition, the LM5068MM-4 offers a host of monitoring features, such as current monitor, voltage monitor, power monitor, and fault monitor. These features allow the device to detect any faults or over-currents in the system. This device also come with a user-configurable reset pin that can be used to reset the system in case of a fault.

Conclusion

To conclude, the LM5068MM-4 is a PMIC designed for hot-swap applications. It offers a low-side MOSFET for battery charging, voltage regulation, current regulation, and monitoring, integrated safety features such as current limiting, over-voltage/under-voltage protection, reverse-current protection, over-temperature protection, and others. The LM5068MM-4 provides an intelligent current-foldback feature to protect the system and host device from unexpected power peaks due to a faulted load, and includes a power-on signal, state monitoring, and a user-configurable reset pin.

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