LTC4251-2IS6#TRMPBF

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The LTC4251-2IS6#TRMPBF is a monolithic dual n-channel Hot Swap controller suitable for applications that require supplying power or powering down an external supply. The features of this dual Hot Swapper include external current limit, overtemperature shutdown and undervoltage lock-out to ensure that the system is protected from excessive power demands during the power cycling of large external systems. In addition, thermal shutdown occurs when the die temperature exceeds 125°C.The LTC4251-2IS6#TRMPBF operates within a 6V to 23V VIN range, accommodating a wide range of simple as well as complex power computing systems. This Hot Swap controller also actively monitors both ports of the input voltage with 21μA (typical) quiescent current. The slew rate of the output power stage is provided by a 100mV/μs (typical) voltage-controlled current limit that enables fast and reliable power-on sequencing.

The LTC4251-2IS6#TRMPBF Hot Swap controller plays an important role in custom power solutions by supplying clean, reliable power to its system. The device consists of a dual-channel integrated circuit with a novel digital method of detecting when an external supply is faulted. The digital logic provides power failure protection, optional over current protection and fault detection. This circuit monitors the incoming supply voltage and automatically shuts down the system if the supply voltage falls below the undervoltage lockout (UVLO) threshold or if the internal temperature exceeds its maximum rating. Additionally, the device features an extremely low quiescent current, making it ideal for applications that must maintain tight power budgets.

The working principle of the LTC4251-2IS6#TRMPBF is based on a MOSFET power switch that is enabled when the device’s internal logic detects that the power supply is properly connected. If the power supply voltage drops below its undervoltage lockout threshold, the output switch is disabled. A voltage-controlled current limit is present to prevent any inrush current and thus protect the device’s external circuit when the power is connected. Another feature of the LTC4251-2IS6#TRMPBF is the “power good” output pin, which is used to signal the system when the external power source has been correctly connected.

The LTC4251-2IS6#TRMPBF Hot Swap controller is available in an 8-lead MSOP package. Its primary application fields include server, networking and telecommunications industries, medical and industrial systems, battery backup systems, automotive and consumer electronics. In these and many other industries, the device can be used in advanced power supply solutions to provide a cost-effective solution for high-efficiency, reliable power.

In summary, the LTC4251-2IS6#TRMPBF is a dual Hot Swap controller that consists of a power switch and integrated voltage and current limiters. It is suitable for applications that require supplying or powering down an external power supply. This device features an extremely low quiescent current and provides thermal protection, undervoltage lock-out and overcurrent limit that can protect the system from potential power failures. The LTC4251-2IS6#TRMPBF Hot Swap controller is mainly used in server, networking and telecommunications, medical, industrial and automotive industries, as well as consumer electronics.

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