MIC38HC43BM

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The MIC38HC43BM is a monolithic integrated circuit (IC) designed for the control of synchronous DC-DC converters and other microcontroller-based power supplies as well as relay, and isolated low-power applications. This integrated circuit features high-side and low-side MOSFETs, a current-mode buck regulator, a programmable voltage reference, pulse-width modulation (PWM) generator, and an internal oscillator. This device offers a complete power conversion solution in a very small package. It is ideal for applications requiring low latching and high-side current sensing, such as mobile phones and other portable devices.

The MIC38HC43BM is primarily used as a DC-DC controller. This device is capable of converting an input voltage ranging from 3.3 V to 20 V into an output voltage ranging from 0.8 V to 15 V, with a maximum step-down current of 6 A. The IC also provides programmable output current limits, over-temperature shut down, slew rate control, and soft start functionality. Additionally, it offers a number of fault protection features, such as CystalLess Mode and programmable fault recovery.

The IC is powered by a programmable, current-mode buck regulator which enables the user to easily generate a regulated, variable output voltage. The buck regulator works in a current-mode control plane which gives the user a wide range of transfer functions to choose from. These include fast PWM, a hysteretic, and an external signal controlled switching scheme. The buck regulator is equipped with an open-loop trick mode, allowing the user to further optimize the output voltage.

The MIC38HC43BM also features a PWM generator which is used to control the ON and OFF timing of the power MOSFETs. This generator can be set for either a fixed frequency or variable frequency operation. The variable frequency operation can be used to reduce the switching frequency of the power MOSFETs for low output voltage applications. The PWM generator is also equipped with a low-jitter oscillator which ensures that the power supply output voltage is regulated over a wide range of frequencies and temperatures.

The device also includes an integrated voltage reference which helps to maintain the output voltage within a narrow band. Additionally, the device offers a variety of protection features, such as overcurrent protection, thermal shutdown, and over-voltage protection. The integrated oscillator also helps to reduce EMI and reduce noise in the power supply’s output.

The MIC38HC43BM is ideal for a wide variety of applications which require a high level of flexibility and power efficiency. It can be used in portable devices, automotive power supplies, battery-backed data storage systems, telecom systems, floating loads, and many other applications. The device features a wide range of output voltage and current limits, as well as a built-in EMI filter for reduced noise.

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