MIC2546-2BM

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Power management integrated circuits (PMIC) are a type of integrated circuit (IC) designed to offer high-performance management of power delivery, regulation and control. Within the family of PMICs lies a subset of circuits called power distribution switches, load drivers and other power-cycling related components. In this article, the application fields and working principle of the MIC2546 2BM PMIC will be discussed.

The MIC2546-2BM is a two-output, dual-channel, power distribution switch. It provides two independent, high-side power switches managed by a low-side control (MIC2546-2BC) input. It is capable of sourcing up to 1A with over current and thermal protection, and has an adjustable deadtime between turns off and on. With an operating voltage range of 2.5V to 5.5V and a 7µA standby current, it is designed to run in a low-power environment.

The MIC2546-2BM finds application in a range of electronic products. Its low-power design makes it particularly attractive for the active power-cycling of portable and battery-powered devices, where even a small increase in efficiency can induce noticeable cost savings. In addition, its adjustable deadtime and robust fault protection circuitry also allows it to be employed in applications such as automotive electronics, machine control and consumer electronic products.

The MIC2546-2BM uses an internal P-channel MOSFET with an adjustable deadtime to control the flow of power between two connected outputs. When a control signal is applied to the input, power is routed from the enabled output to the output connected to the control input. The internal MOSFET is capable of carrying up to 1A, with a 7µA standby current and a 2.5V to 5.5V operating voltage range. Over-current and thermal protection can also be easily enabled through simple fuse settings.

The MIC2546-2BMM includes a number of features to ensure robust control and performance. The low-side control input provides an active low signal to turn on the power switch and a pull-up resistor to ensure a consistent voltage potential. This ensures that signals are not inadvertently switched off when no control input is present. The adjustable deadtime allows the designer to optimise the switching speed to ensure that power is delivered at the correct time. The MOSFET is also enabled by an enable pin to ensure that power is not routed until the switch is ready. Finally, the MOSFET is protected by fault protection circuitry, providing overload, overtemperature and locked output protection.

The MIC2546-2BM is a powerful two-output, dual-channel, power distribution switch, ideal for power-cycling portable or battery-powered devices. With a small operating current and adjustable deadtime, it is well suited for applications such as automotive electronics, machine control and consumer electronics. Its low-side control input, adjustable deadtime and protection features ensure robust control and performance.

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