MIC2142YM5-TR

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Introduction

MIC2142YM5-TR is a high-performance, low-dropout, switch-mode, adjustable pass transistors (PMIC) voltage regulator suitable for a range of applications. It is designed to provide a minimum of 0.03V output voltage accuracy when operated over its full temperature range of -40°C to +125°C. The device also has high-frequency ripple rejection, high power supply rejection, low noise, and excellent line and load regulation.

Application Field

The MIC2142YM5-TR is commonly used in a variety of power supply applications such as portable computers, IT equipment, portable medical devices, point-of-load systems, automotive, and data storage systems. It is also used in highly precise and sensitive components and circuits, such as data filters, asynchronous threshold voltage computers, programmable logic devices, and power interfaces. And it is also used for precise sample and hold applications, as well as for high-rated current switching control.

Working Principle

The MIC2142YM5-TR uses a pulse-width modulation (PWM) current-mode controlled architecture, which consists of a reference voltage, an internal error amplifier, a current-sensing comparator, and an external MOSFET switch. The internal error amplifier senses output voltage by sensing the voltage drop across a resistive divider connected to the output. If the output voltage falls below the reference voltage, then the error amplifier adjusts the duty cycles of the PWM comparator to increase the output voltage.

When the current in the sense resistor connected to the CS pin exceeds the maximum limit set by the compare voltage, the device automatically reduces the on-time of the MOSFET switch and turns it off, thus limiting the current to the maximum value that the device can handle. This current-mode control helps to ensure the maximum current limit and the shortest possible switching waveform.

The MIC2142YM5-TR is also protected against over-current and short-circuit conditions. It features externally adjustable operating frequency and short-circuit protection modes which can be set by external components. The device also features an adjustable soft-start pin which allows the output voltage to ramp up smoothly at the beginning of each switching cycle.

Conclusion

In summary, the MIC2142YM5-TR is a high-performance, low-dropout, switch-mode, adjustable pass transistors (PMIC) voltage regulator suitable for a variety of power supply applications and high-precision circuits. It uses a pulse-width modulation (PWM) current-mode controlled architecture, with externally adjustable operating frequency and short-circuit protection modes, as well as an adjustable soft-start pin. The device is protected against over-current and short-circuit conditions and provides excellent line and load regulation.

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