MIC5208-4.0YMM

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The MIC5208-4.0YMM is a voltage regulator from the Linear Voltage Regulators range from Power Management IC (PMIC) containing low dropout regulator (LDO) features 5V of maximum output, and up to 4.0 A of maximum current. This voltage regulator is capable of providing very high levels of accuracy, high output ripple rejection and stability, as well as excellent line and load regulation for both (4.5V to 28V) input voltage. The MIC5208 has a strong power stage design and it has excellent thermal performance characteristics.

Description

The MIC5208 is an output voltage regulator with an internal current sense, current limiting, and thermal shutdown protection. It features a low reference voltage of 0.225V with a minimum output voltage of 0.5V and a maximum of 5.5V. The input voltage range is 4.5V to 28V with typical quiescent current of 4.5mA. The MIC5208 can support up to 4.0A of load current and it can deliver a maximum of 35W output power.

Key Features

• Wide input voltage range (4.5 V to 28 V)
• Current limit, over-temperature, and over-voltage protection
• Excellent line and load regulation
• Low dropout voltage
• Low quiescent current
• Output current of 4A
• Selectable dropout voltage setting
• Short circuit current limit

Applications

The MIC5208-4.0YMM is widely used in applications that require high efficiency, low dropout voltage and high current. It is well suited for applications in automotive, industrial, and consumer electronics such as monitoring and or controlling voltage in 12V and 24V systems; powering generic ADCs, microprocessors, FPGAs, and DACs; and power supplies for low power motor control.

Working Principle

The MIC5208-4.0YMM is a linear regulator which operates at a constant voltage. The regulator monitors the input voltage, and when the input voltage increases above the output voltage, the integrated linear regulator will adjust the output voltage to keep it constant. The regulator also has a current sense feature that monitors the current going through the regulator and turns off in the event of an overtemperature or overvoltage event. This provides protection against over current and thermal conditions in the system.

The MIC5208-4.0YMM uses a control loop to sense and adjust when the input voltage is higher than the output regulated voltage. The controller uses a voltage reference to set the regulated output voltage, and then adjusts the output voltage by means of an error amplifier and MOSFET. The error amplifier monitors the output voltage and compares it to the reference voltage. If the output voltage exceeds the reference voltage, the error amplifier will adjust the regulator until the output voltage is equal to the reference voltage.

The MIC5208-4.0YMM voltage regulator utilizes a low dropout (LDO) architecture in order to accurately regulate the output voltage with low input voltages. This allows the regulator to maintain the output voltage over a wide range of input voltages without significant losses. The low quiescent current also reduce power dissipation, enabling the device to deliver high output power at higher input voltages with lower power dissipation.

Conclusion

The MIC5208-4.0YMM is a linear voltage regulator in the Power Management IC (PMIC) range from Linear Voltage Regulators. It is capable of providing very high levels of accuracy, high output ripple rejection and stability, as well as excellent line and load regulation for both (4.5V to 28V) input voltage. It is widely used in applications that require high efficiency, low dropout voltage and high current including automotive, industrial, and consumer electronics.

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