PMIC - Voltage Regulators - Linear

MIC39301-2.5BT Application Field and Working Principle

The MIC39301-2.5BT is a 2.5V, 150mA LDO linear regulator from the MIC393xx series of products by Micrel, Inc. It is a small, low-power regulator that is ideal for a variety of applications including portable consumer electronics and battery-operated equipment. In addition to the convenience of a built-in shutdown feature, the MIC39301-2.5BT is capable of good thermal performance and is available in surface mount and through-hole packages.

The primary feature of the MIC39301-2.5BT is its ability to provide a stable 2.5V output, even when the input voltage varies. This is accomplished by the linear regulator\'s feedback loop, which continually monitors the output voltage and adjusts the voltage applied to the pass element (in this case a BJT) to ensure a constant output.

When the input voltage rises, the current drawn from the pass element increases, allowing more current to flow through the regulator. The output voltage is then fed back to the non-inverting input of the internal error amplifier, which compares the voltage with a reference voltage provided by the reference terminal (Vref). If the feedback voltage is greater than Vref, the error amplifier turns off the pass element, reducing the current to bring the output back to 2.5V.

The MIC39301-2.5BT is able to provide good regulation performance in a variety of different applications. With a high input voltage range (up to 24V), it is well suited for applications that may need to operate from a variety of input voltages. In addition, the MIC39301-2.5BT can provide a good load transient response and best-in-class line/load regulation.

The MIC39301-2.5BT is available in a variety of package options, including a miniature DFN-5 (5-pin) package, a 6-pin SOT-23 package, and a 3.3mm x 3.3mm DFN-10 (10-pin) package. It is RoHS compliant, and requires only a minimum of external components for proper operation. The minimum input voltage for the IC is 2V, and it has a minimum operating temperature of -40°C and a maximum operating temperature of 125°C.

The MIC39301-2.5BT is suitable for a variety of applications, such as telecom and networking systems, instrumentation, consumer electronics, and mobile communications devices. It is also a good choice for portable applications, as it consumes only 7.5uA of quiescent current.

The MIC39301-2.5BT is a small, low-power linear regulator that provides good regulation performance and is suitable for a variety of applications. Its small size and low quiescent current make it ideal for applications that require a reliable, low-power supply.