MIC39152WU

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The MIC39152WU is a low dropout adjustable regulator from ON Semiconductor. Designed to replace the conventional two-component regulator system with a single package insulated transistor, this regulator has been used in many applications in recent years. It is classified as an adjustable linear regulator in the category of PMIC (Power Management Integrated Circuits).

This discrete device has been designed to achieve a minimum dropout voltage of a mere 1.2 V across a wide-range of input voltages; ranging from 2.25 V to 14 V. Allows up to 100 mA of load current, this device is capable of functioning in operating temperature range of -55 degree Celsius and 150 degree Celsius. The MIC39152WU also offers a wide variety of protection features such as reverse input protection, output current limit, as well as thermal shutdown.

The MIC39152WU is an excellent choice for several applications ranging from mobile electronics to military and industrial applications, making it a versatile device. It is best suited for applications such as battery backed circuits, power stability related to extended temperature range, and low supply voltage circuits. A few of the applications where the MIC39152WU is used include: power supplies and battery chargers, communication systems, motor control and switching, current controlled oscillators, voltage references and converters.

The MIC39152WU is a very simple device to use while the operation is relatively simple. It consists of five pins: an adjustable Output Voltage Terminal (VOUT), two Ground Terminals (GND), Input Positive Terminal (VIN) and a Adjustable Voltage Reference (VREFL) which is also known as a programming pin. The regulator operates off a constant current source connected to the VREFL pin. When the input voltage is applied to the VIN terminal, the voltage will be adjusted such that the voltage at VOUT is equal to the voltage programmed at VREFL terminal. It is also possible to adjust VOUT to a particular voltage by programming the desired voltage at the VREFL pin.

When the voltage present at VIN exceeds the programmed output voltage, the difference is regulated by current flowing at the output. The current then causes voltage drop across the internal resistance which is equal to the difference between the input voltage and the programmed output voltage. This drop in voltage is also known as dropout voltage and its magnitude is a function of the function of the load current. The higher the load current, the higher the drop out voltage. This means that a large load current can cause a significant of drop in the output voltage, thus it is important to ensure that the input voltage remains slightly higher than the output voltage at all times.

To ensure stability with transient loads, it is important to use an adequate output capacitor in your circuit. The capacitor also helps to reduce sudden drop in output voltage due to transients in the load current. A typical output capacitor value for the MIC39152WU is 10uF. The capacitor should also be chosen such that it has an ESR (equivalent series resistance) value that matches with the value of the output resistance of the regulator.

To summarize, the MIC39152WU is an adjustable linear regulator from ON Semiconductor, that provides a minimum dropout voltage of just 1.2V across a wide-range of input voltages. Its ability to provide protection features and stable operations with a low supply voltage make it a suitable device for several applications such as power supplies and battery chargers, communication systems, motor control and switching, current controlled oscillators, voltage references and converters. The MIC39152WU can be easily used in a circuit by understanding its working principle and connection requirements.

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