MIC49300-1.8WR-TR

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MIC49300-1.8WR-TR is a linear voltage regulator chip and belongs to a type of power management integrated circuit (PMIC). This low voltage regulator chip is made for automotive and industrial applications, as it’s a small surface mount (SMT) part, ideal for reducing number of parts count. This component is an adjustable voltage regulator that consists of a voltage reference, an error amplifier, a transconductance control amplifier, and pass elements. When powered on, the device is in the proportional mode where output duty cycles are determined by resistors. It also has thermal protection and short-circuit protection with cycle-by-cycle current limiting that provide added reliability.

This regulator is designed to cover a wide range of Input Voltage (IV) operating range from 4.5 to 36V while Output Voltage (OV) is adjustable from 0.8 to 33V. With an output peak current of up to 1.8 A (1.2A continuous), it features high PSRR at 65 dB and low noise output at 10 μVrms. Due to its flexible adjustable regulation and high PSRR, this device is ideal for automotive and industrial applications.

Working principle:

The MIC49300-1.8WR-TR carries out the voltage regulation process by taking in the input voltage and providing with the output voltage that can be adjusted within the range of 0.8 to 33V. One must note that output voltage is always lesser or equal to the input voltage for the device to work correctly. The output voltage is regulated by monitoring the difference between the output voltage and the reference voltage using an error amplifier. By using the transconductance control amplifier, the MIC49300-1.8WR-TR is able to adjust the output voltage by accurately controlling the pass elements.

The device also implements two feedback loops to reduce the output voltage ripple and eliminate secondary effects from output voltage ripple. These two feedback loops act in multiple directions to minimize the output voltage ripple with the help of the error amplifier. The additional components present in the device such as short-circuit protection and thermal protection ensures that the device is safe to operate in extreme conditions and will not cause any permanent damage.

Conclusion:

The MIC49300-1.8WR-TR is a power management integrated circuit (PMIC) that comes in the form of a linear voltage regulator chip, specifically designed for automotive and industrial applications. This low voltage regulator chip features a wide IV operating range from 4.5 to 36V while OV is adjustable from 0.8 to 33V with an output peak current of up to 1.8A (1.2A continuous), and high PSRR at 65 dB and low noise output at 10 μVrms. Additionally, the device also has two feedback loops, short-circuit protection and thermal protection, to ensure that the device can be safely used in harsh environments. All these features make the MIC49300-1.8WR-TR ideal for various automotive and industrial voltage regulation applications.

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