LM5068MM-4/NOPB

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The LM5068MM-4/NOPB is a Monolithic Hot Swap Controller with MOSFET using ultra low quiescent current to maintain low thermal resistance. This device belongs to the category of Power Management Integrated Circuit (PMIC) and Low impedance Dual Output Hot Swap Controllers. It offers the highest level of protection for system and device reliability, including current overload and overtemperature protection, undervoltage lockout (UVLO) and overtemperature shutdown (TSD).

The Hot Swap application field typically includes supply voltage monitoring on costly or aging systems and overvoltage/undervoltage protection during system operation, whether with a 5V, 12V, or 24V system. This device is suitable for providing the highest level of protection when installing delicate components into the system. It is useful in applications with multiple supply domains, as it can detect when voltages are mismatched and automatically shut down the system to prevent damage.

The LM5068MM-4/NOPB Hot Swap Controller uses an integrated MOSFET to protect the system from high-temperature and current overload events. The MOSFET is designed to support current carrying capability up to 200A. Additionally, it contains an ultra low power consumption design when the MOSFET is in standby mode, providing minimum power consumption for improved thermal performance.

The working principle of this Hot Swap Controller can be divided into 4 stages. First, the controller monitors the input voltage VIN and turns on the external MOSFET when VIN rises above the UVLO threshold. When the input voltage reaches a value above the start up threshold, the controller is triggered to force the output current to 5A. The controller then limits the output current to a maximum level (I_LIM). Finally, when the output voltage exceeds the voltage protection level (V_LEV), it will stop the current flow. The operation of the device is monitored through an active low Overtemperature Shutdown (OTS) signal.

The LM5068MM-4/NOPB Hot Swap Controller from Texas Instruments is an excellent choice for applications requiring high level of reliability and robust protection. In addition to the above-mentioned benefits, this device also integrates with LED and fault outputs, which help in visual indication of the state of operation and fault reporting.

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