MIC2586R-1BM

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Power management integrated circuits (PMICs) are essential components used in today\'s electronic applications to provide clean voltage, maintain stable operation and optimize power efficiency. Among the different PMIC categories, hot swap controllers (HSCs) function to ensure a safe connection between the supply and load and protect the system from damage in the event of a power surge. The MIC2586R-1BM hot swap controller from ON Semiconductor provides reliable power management for a wide range of applications, from charging systems and computer servers to industrial machines and telecommunications systems. In this article, we will discuss the application field and working principle of the MIC2586R-1BM.

Applications

The MIC2586R-1BM hot swap controller is designed to provide power management in a wide range of applications. This HSC is well suited for use in high powered computing systems such as servers, telecommunications systems, industrial control systems, and other linked networks. The device is able to provide on-board system protection in the event of an over-current, over-voltage, reverse-bias voltage, or ESD (electrostatic discharge) event. The MIC2586R-1BM features an adjustable over-voltage lockout and can be used to detect an excessive inrush current from a power supply. Additionally, the HSC is capable of providing redundant power management for hot swap applications, such as charging systems and computers.

Working Principle

The MIC2586R-1BM is a voltage-controlled load switch controller that can be used to quickly switch power to a load. The HSC employs series-arm configuration to provide a wide range of load-current capability. An on-board transistor is used to control the state of the external device\'s power connection. The external device is powered when the voltage at the UP pin is greater than the voltage at the DOWN pin. The MIC2586R-1BM also features a built-in current sense voltage (CSV) - sense input. This input allows the controller to sense the voltage drop across an external resistor to monitor the load current. This eliminates the need for an external current sense amplifier and provides greater accuracy in sensing the load current.

The MIC2586R-1BM features adjustable under-voltage lockout (UAx), overvoltage lockout (OVLOx), and over-current lockout (OCLOx). The UAx feature allows the microcontroller to set the desired minimum voltage for the system to remain powered. The OVLOx feature turns the load off when the output voltage rises above the set limit. The OCLOx feature also turns off the load when the sense voltage indicates an excessive load current.

The MIC2586R-1BM also includes an adjustable inrush current limit (ICLx) feature to minimize inrush currents from a power supply. This feature reduces the amount of power dissipated in the system by limiting the peak current drawn from the supply. The device also provides an adjustable ESD capacitor on the load power line for ESD protection.

The MIC2586R-1BM is designed with a fast turn-on and turn-off timing. It features a 180Ω pull-up resistor on the UP/DOWN pins to allow the device to quickly transition between the on and off states. Furthermore, the HSC includes an integrated soft-start feature to reduce the stress on the system when powering up or powering down.

Conclusion

The MIC2586R-1BM hot swap controller from ON Semiconductor is an ideal choice for a wide range of applications. This device is able to provide efficient on-board system protection with adjustable UVLO, OVLO, and OCLO features. Additionally, the HSC features an adjustable inrush current limit and an integrated ESD protection circuit. With its fast turn-on/off timing and integrated soft-start feature, the MIC2586R-1BM is an ideal power management solution for a wide range of power supply applications.

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