MIC5239YMM-TR

MIC5239YMM-TR Application Field and Working Principle

PMIC - Voltage Regulators - Linear

The MIC5239YMM-TR is a 3-terminal adjustable voltage regulator from Micrel Semiconductor, a leading provider of integrated circuits solutions. It is designed to regulate the output voltage of a power supply up to a maximum of 1.2V with an accuracy of ±2% over line, load and temperature variations. The adjustable output voltage makes it ideal for use in telecommunications, networking, data processing, consumer electronic and other electronic applications. In terms of its working principle, the MIC5239YMM-TR is a low dropout three-terminal adjustable voltage regulator which employs an N-channel MOSFET as its main switch. The output voltage is adjusted through an external divider network. In P-channel MOSFET mode, the MIC5239YMM-TR is designed to regulate up to 1.2V (2.4V in the P2 mode). The current-limit circuits of the MIC5239YMM-TR are designed to protect the device from excessive operating current during an overload condition. This device also features a low dropout voltage, low quiescent current, thermal shutdown and reverse-battery protection.

The MIC5239YMM-TR is well-suited for a wide variety of automatic control applications, such as power supply voltage tracking and critical application voltage regulation. The MIC5239YMM-TR includes an on-chip adjustable current source that can be used to provide a regulated output current up to 1A. This current source is adjustable externally over a wide voltage range. The MIC5239YMM-TR also features a fast start-up circuit, which enables the device to quickly recover to its normal operating voltage after a low-voltage fault condition. Additionally, the MIC5239YMM-TR has an error flag output that alerts the user if the output is outside the error range.

The MIC5239YMM-TR is designed for low-power applications, and its minimum operating current of 20 mA and quiescent current of 85 mA make it ideal for use in battery-powered and automotive applications. The low dissipation, wide voltage range and fast response time of the MIC5239YMM-TR make it ideal for applications requiring fast control such as LED driver applications, as well as applications requiring fast current-mode regulation such as power inverters.

In terms of safety and reliability, the MIC5239YMM-TR offers several protective features to ensure that it operates within its specified limits. The MIC5239YMM-TR includes an on-chip over-voltage protection circuit which switches off the output voltage when the output voltage exceeds the specified limit. Additionally, the MIC5239YMM-TR includes an on-chip thermal protection circuit which shuts down the device when it gets too hot. The MIC5239YMM-TR also has a reverse-battery protection circuit which protects the device from being damaged by reverse polarity power supply.

In summary, the MIC5239YMM-TR is an adjustable voltage regulator designed for low-power applications. Its internal circuit architecture and protective features make it ideal for use in a wide range of applications requiring a regulated output voltage. It is ideal for use in applications requiring fast control or current-mode regulation and can be easily adapted to customize it for specific applications.