MIC29301-5.0BU TR

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The MIC29301-5.0BU TR is an 18-V, configurable direct battery-powered linear regulator from Microchip Technology. It is part of the MIC29300 series of voltage regulators and belongs to the PMIC – Voltage Regulators – Linear family. The device is a low-dropout (LDO) regulator that provides adjustable output voltages regulated down to 0.5 V with load currents up to 150 mA. It is designed to reduce external system requirements and costs by cutting down on the number of external components. The MIC29301-5.0BU TR is particularly well suited for applications where the input voltage range is 0.5V to 18V, and the output voltage needs to be adjustable to within ±0.1V of an external reference voltage.

The MIC29301-5.0BU TR features a precision voltage reference, a voltage follower, and the ability to adjust output voltage using an external voltage reference. This makes the device particularly suitable for applications where the output voltage needs to be accurately maintained, such as communications systems. Output current limiting is provided to protect against short circuit and overload conditions, while thermal shutdown protects against damage due to excessive power dissipation.

The MIC29301-5.0BU TR is a highly reliable and cost-effective device, offering high accuracy and low dropout voltage. It has an operating temperature range of -40°C to 85°C and requires minimal external components for operation. Other features include an enable/shutdown pin, a power good indicator, and a remote sense input/output for voltage compensation. The input voltage range supports both lithium-ion and alkaline battery chemistries, with a wide selection of output voltage options.

In operation, the MIC29301-5.0BU TR uses a two-stage topology consisting of an internal PMOS pass transistor and an internal NPN pass transistor. The PMOS transistor regulates the output voltage while the NPN transistor controls the current sense and load protection. An external voltage reference is used to preset the output voltage, while the current limit and thermal shutdown thresholds are internally adjustable. A P-Channel enhancement mode MOSFET is used to provide reverse current blocking when the device is disabled.

In addition to its primary use as a direct battery-powered linear regulator, the MIC29301-5.0BU TR can also be used in other applications such as automotive and industrial systems, as well as medical, handheld and instrumentation systems. The device provides an efficient and cost-effective solution for all kinds of applications where input voltage, low dropout voltage, and high precision are needed.

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