MIC5504-3.1YMT-TZ

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Microchip Technology Inc\'s MIC5504-3.1YMT-TZ is a member of the low-dropout linear regulator family, delivering adjustable output voltages down to 1.23V. Its low dropout voltage and quiescent current make it an ideal choice for a variety of applications, especially in battery-powered devices and systems. This article will explain the application fields and working principles of the MIC5504-3.1YMT-TZ.

Application Field

The MIC5504-3.1YMT-TZ is designed with power-saving features that help to reduce the power consumption and extend battery life in applications such as handheld devices (smartphones and tablets), PDAs, digital cameras, and gaming consoles. The Wide Input Voltage Range (1.8V-20V) feature allows for adjustable output voltage, making it ideally suited for switching regulators in power management systems. The device also offers excellent load regulation (1.23V-5V) and current limiting that further extend its application possibilities.

The MIC5504-3.1YMT-TZ is an ideal regulator for low noise and high ripple rejection application, such as audio power amplifier, Bluetooth modules and reception modules, etc. This device has excellent noise performance over frequency and temperature, operating temperature range (-40°C to +125°C), ultra low shutdown current (8μA).

Many applications rely not only on power stabilization but also dynamic operation. The MIC5504-3.1YMT-TZ provides a user-programmable functions such as power up sequencing, power down sequencing, power good period and power off delay, ensuring that the system always starts and shuts down under the right conditions.

Working Principle

The MIC5504-3.1YMT-TZ is a low-dropout linear regulator, working with a differential amplifier that converts a voltage difference between input and output voltage into an error voltage. This error voltage is then compared with a reference voltage and the comparison result is used to drive the pass transistor at the output, regulating the output current or voltage to the desired value.

The output voltage is selected by connecting a low-value resistor network between the FB pin and ground. The FB pin senses the output voltage, and the resistor network is used to adjust the output voltage. The device will maintain the output voltage at the programmed level as long as the input voltage, current, temperature and load conditions all remain within allowable limits.

The MIC5504-3.1YMT-TZ offers protection features, such as reverse voltage protection to guard against reversed battery connections, nanosecond-level turn-on/off, over-temperature and current limit protection to switch the regulator off when these conditions are exceeded.

Conclusion

The MIC5504-3.1YMT-TZ is a low-dropout linear regulator that can be used for a wide range of applications including battery-powered devices, audio power amps, Bluetooth modules, and more. Its low dropout voltage, current limit protection, and dynamic operational features make it an ideal choice for applications where low quiescent current and power savings are a priority.

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