MIC5191YMM-TR

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MIC5191YMM-TR Application Field and Working Principle

The MIC5191YMM-TR is a high precision 600mA Linear Regulator Controller from Micrel Inc. It is designed for a wide range of PMIC (Power Management IC) applications.

The MIC5191YMM-TR features an ultra-low dropout voltage (less than 140mV at 600mA) and low quiescent current (typically 30µA). It includes a logic-controlled shutdown mode, providing a low power standby current of 1µA. The MIC5191YMM-TR also has over-temperature protection as well as over-voltage and under-voltage protection, making it ideal for automotive, industrial and communication applications.

The MIC5191YMM-TR is a fixed output voltage regulator featuring a voltage reference, a current limiter, an amplifier, and an output comparer. The reference voltage is set with a resistor divider connected to a bandgap reference. This reference voltage is compared to the output voltage in order to regulate it. The current limiter is used to prevent over-current conditions and protect the output device from damage. The amplifier is used to compare the output voltage to the reference voltage, and its output is used to adjust the output voltage. The output comparer is used to signal a fault condition when the output voltage is outside of its specified range.

The MIC5191YMM-TR provides good transient response characteristics and maintains regulation to within ±0.4% over line, load, and temperature conditions. It operates with low dropout voltage (≤ 0.14V at 600mA) and low quiescent current (typically 30µA). Its current limit threshold can be externally voltage adjusted via an external resistor.

The MIC5191YMM-TR is well suited for automotive, industrial and communication applications. Its low dropout voltage and low quiescent current make it ideal for portable battery-powered devices. Its integrated over-temperature protection, over-voltage protection, and under-voltage protection make it ideal for applications which require protection from environmental and physical hazards. Its low power shutdown mode also makes it ideal for applications which require low standby power.

In summary, the MIC5191YMM-TR is a high precision 600mA linear regulator controller for a wide range of PMIC applications. It features an ultra-low dropout voltage and low quiescent current and includes an over-temperature protection, over-voltage protection and under-voltage protection. It provides good transient response characteristics and maintains regulation to within ±0.4% over line, load, and temperature conditions. It is ideal for automotive, industrial and communication applications and is well suited for portable battery-powered devices.

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