MIC5156YM

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The MIC5156 is a high-performance, low-power linear regulator controller, designed to provide constant-voltage and constant-current regulation in applications demanding very low dropout voltage and high accuracy. The MIC5156 has a wide input voltage range and is capable of generating an adjustable output voltage up to 5.5 V with a high precision reference and current limit capability. It is easily configurable with external components to provide a low-dropout regulator with low quiescent current, line and load regulation, and over-current and over-temperature protection. This design consists of an error amplifier, a current source, and a resistor divider.

The MIC5156 provides a comprehensive current-monitoring and voltage-regulation function. The device monitors output voltage and current, and adjusts the output in order to maintain a constant output voltage and current. The current-sense output line allows the MIC5156 to monitor the current pass through the load, and the voltage-sense line allows the device to monitor the output voltage. The MIC5156 then adjusts the output current so that the load current is maintained within the current-limit window, while the output voltage is kept constant.

When placed in the application circuit, the MIC5156 uses an external current source to source or sink current to the load, based on the sensed load current and output voltage. The reference voltage and current-sense circuitry do not contribute to the dynamic load impedance, however, the current source does. This means that the MIC5156 is able to regulate a wide range of loads, both resistive and capacitive, up to the maximum output current of the device.

The MIC5156 also features integrated over-current and temperature protection. An over-current comparator monitors the current pass through the load and will indicate output shutdown when the current reaches a user-defined limit. Additionally, the MIC5156 includes a temperature-monitor that will signal an over-temperature condition if the junction temperature of the device approaches its maximum limit.

The MIC5156 is ideal for a variety of applications, including computer systems, communications systems, and general-purpose power supplies. Its wide input voltage range and adjustable output voltage capability make it easy to design systems that require accurate and reliable voltage regulation. Its current-sense capability also allows users to easily monitor the load current, and its over-current and over-temperature protection make it suitable for high-reliability applications.

In summary, the MIC5156 is an ideal linear regulator controller for applications that require low-power, small form factor designs. It offers excellent line and load regulation, low dropout voltage, and current-sense capability. Additionally, its integrated over-current and temperature protection makes it suitable for high-reliability applications. With its flexible externally-programmable architecture, it can be easily configured to meet the needs of any application.

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