MIC94355-4YCS-TR

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MIC94355-4YCS-TR - PMIC - Voltage Regulators - LinearThe MIC94355-4YCS-TR is an advanced linear voltage regulator, ideal for battery powered and automotive applications. This low-power voltage regulator can provide up to 4A of current and an output voltage range of 1.235V to 20V. It features excellent load regulation, low supply current, and low dropout voltage. It also meets the requirements of the AEC-Q100 grade 1 for automotive operating temperature range. This adjustable regulator includes an external frequency compensation network that gives excellent transient response, making it ideal for demanding applications that require high load and line transient performance. It also includes an active current limit circuit and thermal shut-down to protect the load from damage during overload events.Applications for the MIC94355-4YCS-TR include automotive and battery-powered portable devices such as medical instruments, automotive electronics, consumer electronics, industrial equipment and telecommunications equipment.Working PrincipleThe MIC94355-4YCS-TR is a low power, three-terminal adjustable linear voltage regulator. It utilizes advanced process technologies to deliver very high precision/accuracy, low operational current, and excellent line and load regulation. The internal current limit and thermal shut-down features protect the regulator against excessive current and over-temperature events.The MIC94355-4YCS-TR features rail-to-rail operation at the input and output. The input voltage range is 1.5 to 27 V and the output voltage range is 1.235V to 20V. The output voltage is adjustable via an external resistor divider network.The internal circuit includes an error amplifier that compares the output voltage with a reference voltage to produce a control voltage. This control voltage is then compared with a reference current and the output is regulated at this level by the current source.The regulator features excellent line and load regulation, low ripple and noise, and low dropout voltage. The thermal shut-down circuit and the active current limit circuit protect the load from damage during overload events. The MIC94355-4YCS-TR is also protected against reverse-battery connections and reverse-current flow.ConclusionThe MIC94355-4YCS-TR from Micrel is a low-power adjustable linear voltage regulator. It provides excellent load regulation, low supply current, low dropout voltage and rail-to-rail operation at the input and output. The regulator also includes an active current limit circuit, thermal shut-down and external frequency compensation for excellent load and line transient performance. The MIC94355-4YCS-TR is perfect for automotive, battery-powered portable equipment and other circuit design applications that require high precision and accuracy. The device is AEC-Q100 grade 1 certified, so it can be used in the most demanding environmental conditions. 

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