MIC29301BT

MIC29301BT Application Field and Working Principle

The MIC29301BT is a series of low-quiescent current, 4-terminal linear voltage regulator ICs from Micrel Semiconductor, Inc., and is classified as a PMIC (Power Management IC) voltage regulator of the linear type. This series of voltage regulators offer significant advantages in terms of low quiescent current, fast transient response, and precise, adjustable output voltage.

The MIC29301BT series is comprised of 4-terminal linear voltage regulator ICs with an adjustable output voltage from 1.2V to 5.0V. These ICs can regulat output voltages up to 25W, with an operating voltage range of 4.5V to 36V. The main characteristics of the MIC29301BT are a maximum output current of 1.2A and a quiescent current of just 6mA. In addition, they have been designed with a fast transient response, and are offered in small, compact form factors of only 9.5mm X 8.0mm.

Application Fields

The MIC29301BT is ideal for applications requiring low quiescent current, low voltage output, and precise voltage control. It is commonly used in consumer electronics, such as PDAs, digital cameras, tablet PCs, and car audio systems. The MIC29301BT is also used in industrial and medical systems, communication equipment, and automotive circuit boards.

Working Principle

The MIC29301BT is a 3 pin voltage regulator IC, which includes an input voltage, ground and output voltage. The input voltage can be from 4.5V to 36V, and the output voltage can be corrected from 1.2V to 5.0V. Despite the high input voltage, the output voltage of the IC will remain the same.

The circuit of the MIC29301BT consists of several components, including an amplifier, a voltage reference, an error amplifier, P-channel and N-channel MOSFETs, and a linear regulator. The amplifier is used to sense the input voltage and feed it to the error amplifier. The voltage reference is a reference input to the amplifier, which is then compared to the actual voltage. The error amplifier is used to control the two MOSFETs, one of which will increase voltage, while the other decreases it.

The MOSFETs control the output voltage and allows for the adjustment of the output voltage. Finally, the linear regulator passes the input voltage to the output and maintains the output voltage to the specified level. In addition to maintaining the output voltage, the linear regulator also allows for a very low quiescent current.

Conclusion

The MIC29301BT is a series of 4-terminal linear voltage regulator ICs from Micrel Semiconductor Inc. that offers significant advantages in terms of low-quiescent current, fast transient responses, and precise, adjustable output voltage. The MIC29301BT is commonly used in consumer electronics, industrial and medical systems, communication equipment, and automotive circuit boards.

The MIC29301BT series of ICs features a maximum output current of 1.2A and a quiescent current of just 6mA. The IC consists of several components, including an amplifier, voltage reference, error amplifier, P-channel and N-channel MOSFETs, and a linear regulator. These components enable the IC to control the output voltage, adjust the output voltage, and maintain the output voltage to the specified level while also providing a very low quiescent current.