MIC38C42BMM

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The MIC38C42BMM is a high-efficiency, monolithic, synchronous, 2-phase, interleaved DC-DC step-down converter with integrated FETs, available in a 10-pin Lead-free DFN package. It operates from an input voltage range of 4.5V to 14V and provides output currents up to 6A. The MIC38C42BMM is designed to serve as a power regulation solution in space- and power-constrained, cost-sensitive applications including LMPS, ultra-book and tablet PCs, telecom/datacom appliances, and all type of consumer industrial and automotive applications.

The chip is designed to regulate the output voltage at a reference specified by the user with ±2% accuracy. Cycle-by-cycle overcurrent protection can be programmed to trip at the desired current limit level, which is proportional to the negative current sense voltage applied in CS-pin. It also features an adjustable or fixed soft-start during start-up, an adjustable or fixed frequency compromise between efficiency and EMI level. An enable pin is featured to put the converter into a low power operating mode.

The MIC38C42BMM comes with configurable Type I and Type II Advanced Sequencing and Multi-Phase operation with forced interleaving. This feature greatly improves both light load efficiency and EMI/RFI performance. There is also adjustable/fixed 1A loop compensation as well as an additional bypass capacitor for TL431 stable output voltage.

The MIC38C42BMM also comes with an adjustable current limit and frequency foldback protection, which lowers the switching frequency proportionally with decreasing output load for improved efficiency under light loads. In addition, the switching frequency 0 to 650 kHz and operating temperature ranges from -40°C to 85°C.The device includes many safety features such as Current Mode Control, programmable soft-start, Under Voltage Lock Out(UVLO), Over Voltage Protection(OVP),Thermal Shutdown(TSD) and Overload Protection (OLP).

The power dissipation of the MIC38C42BMM is extraordinary low such that the heat sink size is reduced to a minimum. To take advantage of the power dissipation, the chip is able to operate higher frequency with higher efficiency. The device is an excellent candidate for applications requiring high efficiency and low power dissipation.

The MIC38C42BMM is widely used in PMIC – AC DC converters, offline switchers, and other power management applications. Typical applications for this device include Li-ion battery powered applications, DC-DC conversion for telecom/datacom, and HP/LP-mode DC-DC conversion for automotive electronics.

The working principle of the MIC38C42BMM is quite simple – it takes in AC power from the wall adapter and converts it into a DC voltage suitable for use in a specific application. The power converter consists of two parts – the power switch and the output inductor. It works by converting AC power into DC power with the use of the power switch, which is turned on and off rapidly in order to transform alternating current into direct current. The output inductor stores the energy and provides the current to the load.

The power switch is usually a MOSFET that is placed on either side of the output inductor. When the switch is closed, current is transferred from the power adapter to the output inductor, and energy is stored in the inductor. When the switch is opened, the current stored in the inductor flows through the load. The MIC38C42BMM operates in a pulse width modulation (PWM) control mode to control the transfer of power from the power adapter to the load. It uses a feedback loop to regulate the current and regulate the output voltage.

The MIC38C42BMM is designed to reduce the size and cost of a power management system. It is ideal for charging applications, AC to DC power conversion, DC to DC power conversion, telecom/datacom applications, and Li-ion battery powered applications. The device is easy to use, efficient and reliable, making it an ideal choice for a wide range of power management applications.

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