MIC5235BM TR

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The MIC5235BM TR is a low-voltage, precision, low-dropout, linear voltage regulator device from the MIC52xx series of voltage regulators manufactured by Micrel, Inc. The device offers a wide range of features and benefits, which make it well-suited for applications requiring precision voltage regulation such as powering digital ICs and analog circuits. The device also operates from input voltages ranging from 2.5V to 10V and provides current up to 500mA. This article provides an overview of the MIC5235BM TR’s application field and working principle.

Application Field

The MIC5235BM TR provides high accuracy voltage control with good line and load regulation and low noise. It has a wide range of features and benefits which make it suitable for a variety of applications, including:

• Powering digital ICs and analog circuits.
• Ensuring precise voltage regulation in logic supply lines.
• Protecting sensitive circuitry from overvoltage.
• Powering data converters, clocks and microprocessors.
• Powering sensor systems and wireless radios.

For these applications, the device’s active low shutdown feature, output enable enable/disable pin, and reverse voltage protection enable the designer to minimize power consumption when the device is not in use, while providing fast start-up times and precise voltage control.

Working Principle

The MIC5235BM TR’s output voltage is regulated by a differential amplifier whose two inputs are a voltage divider string connected to a bandgap reference (VBG) and the resistive divider connected to the output terminal (VOUT). The voltage at the output terminal is then compared to the VBG voltage, and any difference voltage is sensed by the error amplifier circuit. The error amplifier then develops an output voltage (VOSC) to control the gate of an external P-channel MOSFET, which controls current flow from input to output.

The MIC5235BM TR device has an active low shutdown pin which is typically connected to the output of a power on reset circuit to enable the device to enter into a low power standby state. The external MOSFET is then turned off to minimize power consumption. The device also features a reverse voltage protection circuit that prevents the device from being damaged due to reverse voltages beyond the permissible range (1.3V).

The MIC5235BM TR is a precision, low-dropout, linear voltage regulator device which offers a wide range of features and benefits. Its applications in powering and protecting digital ICs and analog circuits, enabling precise voltage regulation and minimizing power consumption, make it an ideal choice for a number of different applications which need reliable and accurate voltage control.

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