MIC5318-1.5YMT-TR

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MIC5318-1.5YMT-TR Application Field and Working Principle

The MIC5318-1.5YMT-TR is a linear voltage regulator from the PMIC - Voltage Regulators - Linear family of products, primarily designed for high speed devices, with 5V and 12V input voltage. Its low-noise and low-dropout performance makes it suitable for a wide range of applications.

The MIC5318-1.5YMT-TR operates by actively comparing and then, when necessary, rectifying an externally applied fluctuating voltage and then regulates the output voltage at a desired level. It continuously charges the output capacitors to keep the voltage constant. The MIC5318-1.5YMT-TR utilizes a proprietary linear regulator, that allows the device to provide clean outputs and with no noise. The device also offers a wide range of protection, including output short-circuit and over-temperature protection.

Applications

The MIC5318-1.5YMT-TR is suitable for a range of high speed applications, such as:

• Automatic control
• Medical instruments and equipment
• LED lighting
• Smart meters
• Smart phones
• Probes and scanners
• Portable electronic devices

Features

• Output voltage of 1.5V to 7V
• Input voltage of 5V and 12V
• Small size allows easy assembly
• High load regulation: 0.2mV typical Line/Load/Temperature
• Low dropout voltage: 0.4V typical for 4V output
• ASIC-compatable output voltage
• Integrated over temperature protection (OTP)
• Low noise and low-distortion linear regulator
• Open-drain output pin allows temperature measurement
• Quiescent current of 10mA maximum
• Stable at high loads

Working Principle

The working principle of the MIC5318-1.5YMT-TR is relatively simple; it works by continually comparing the applied input voltage to its internally set output voltage. The difference between the two is referred to as the “error voltage” or errant voltage. If the input voltage is lower than the desired output voltage, the regulator will adjust its internal reference voltage to increase the output voltage until it matches the input voltage. The opposite principle is active if the input voltage is higher than the output voltage.

The regulator does this by detecting the error voltage and then rectifying it by varying the resistance of the transistors controlling the output current. This procedure cancels the error voltage, restoring the output voltage to its pre-determined level. In order to maintain a stable output voltage, the MIC5318-1.5YMT-TR continuously charges the output capacitors, to prevent the voltage from dropping below the pre-determined level.

The MIC5318-1.5YMT-TR features internal protection functions, including an over-temperature protection. The over-temperature protection (OTP) feature is designed to protect the device from overheating, as the device may not be able to properly regulate the output voltage if it overheats. The device also features an open-drain output pin that allows for temperature measurement.

The MIC5318-1.5YMT-TR is a reliable, low-dropout, low-noise linear regulator for high speed applications. Its low quiescent current and inherently low-noise operation make it a great choice for a range of applications, including automatic control, medical instruments and equipment, LED lighting, and portable electronic devices.

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