MIC38C43YMM-TR

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MIC38C43YMM-TR Application Field and Working Principle

The MIC38C43YMM-TR is an integrated circuit (IC) designed and developed by Microchip Technology that serves as a DC-DC switching controller. It is part of Microchip\'s power management and analog (PMIC) product portfolio and is a voltage regulator and DC-DC switching controller which is used to power systems which require efficient and reliable power supplies.

Description

The MIC38C43YMM-TR is a single-chip DC-DC buck-boost controller with a wide input voltage range from 4.5 V to 40 V. It can be used in both step-up (boost) and step-down (buck) configurations and allows the output voltage to be adjusted to any desired voltage value between 2.5 V and 40 V. The device has many integrated features including a maximum power point tracking (MPPT) feature, an adjustable soft-start function, a power-good output, and a 0.8V reference voltage. It also provides a ‘Power Save’ feature, which allows the power supply to enter a low-power mode when the load is light.

Features

• Wide input voltage range from 4.5V to 40V
• Output voltage adjustable from 2.5V to 40V
• Maximum power point tracking (MPPT) feature
• Adjustable soft-start function
• Power-good output
• 0.8V reference voltage
• Power Save feature for low-power mode operation
• High efficiency operation

Applications

The MIC38C43YMM-TR is designed to be used in DC-DC switching application such as industrial and ultra-low voltage supply chains and telecommunications. It can also be used in a variety of automotive applications, along with advanced driver assistance systems (ADAS) and infotainment systems. It is designed to be used in DC-DC buck-boost switching designs to generate a wide range of output voltages.

Working Principle

The MIC38C43YMM-TR is a mode-based, single-chip DC-DC buck-boost controller. It consists of an on-chip synchronous voltage switched regulator and an analog error amplifier. The device operates in three different modes to provide a wide range of output operations. The three different modes of operation are: buck mode, boost mode, and buck-boost mode. Buck mode is used to step down voltage from higher inputs to regulate the output voltage lower than the input voltage. Boost mode is used to step-up voltage from lower inputs to regulate the output voltage higher than the input voltage. In buck-boost mode, both buck and boost mode are combined to generate any desired output voltage, higher or lower than the input voltage.

The device consists of two main functional blocks – the control block and the power block. The control block has various functional blocks embedded within it such as the oscillator, reference voltage source, voltage error amplifier and logic circuitry. The power block consists of the switch-mode power supply, synchronous buck-converter, and the power FET. The oscillator produces a switching frequency that is used to control the buck-boost controller. The reference voltage source produces a 0.8V reference voltage which is used to compare with the output voltage in order to regulate the output voltage.

The control block is used to monitor and control the voltage error amplifier which compares the output voltage with the reference voltage and generates a control signal proportional to the difference between the two voltages. This control signal is used to regulate the output voltage. The power block is used to switch the power FET according to the control signal generated by the control block and regulate the output voltage. The power FET is used to convert the input voltage from either a higher voltage to lower voltage in buck mode or lower voltage to higher voltage in boost mode.

The MIC38C43YMM-TR has various advanced features such as a maximum power point tracking feature which optimizes the power transfer into the load and an adjustable soft-start feature which reduces inrush current and helps to prevent device damage.

Conclusion

The MIC38C43YMM-TR is an advanced DC-DC switching controller designed and developed by Microchip Technology which is used to regulate the output voltage across a wide range of input voltages. It is designed for applications such as industrial and ultra-low voltage supply chains and telecommunications, as well as automotive applications. The device has various integrated features such as an adjustable soft-start function and a power-good output. It also has an adjustable MPPT feature for optimized power transfer and a 0.8V reference voltage for voltage regulation.

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