AP7381-28Y-13

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PMIC (Power Management Integrated Circuit) voltage regulators are a type of electronic circuitry used to regulate the voltage within a range of levels. It helps protect electronic components from damage due to surges in the input voltage, while ensuring a steady output voltage. PMIC voltage regulators are broken down into two main categories: linear and switching regulators. Linear regulators are generally more cost-effective and efficient than their switching counterparts, and as such, have become a popular choice for many applications.

The AP7381-28Y-13 is a linear voltage regulator from Diodes Corporation that is specifically designed for high-speed load transient operations and fast response times. It features an adjustable output voltage, low quiescent current, and a high-bandwidth operating frequency of up to 2.8 MHz. The regulator is capable of providing an output voltage anywhere from 1.8V to 5.5V and can handle a maximum output current of up to 1.5A. It also provides short-circuit protection and thermal shutdown.

The working principle of this PMIC voltage regulator is straightforward. It utilizes a two- transistor design, consisting of a primary PMOS transistor and a secondary NMOS transistor, and thus requires two operating voltages: a high voltage, referred to as VIN, and a low voltage, referred to as EN. When the EN is held low and the input voltage applied to the VIN pin is higher than the output voltage determined by the resistor divider, the PMOS transistor enables and allows current to flow from the VIN pin to the output and regulates the output voltage accordingly. However, if the voltage difference is large, the internal current limit kicks in to reduce the output current and to protect the device from overheating.

The AP7381-28Y-13 is a reliable solution for many applications, especially those that require high current with fast response times. Some of these applications include DC/DC converters, industrial automation systems, monitoring equipment, and portable devices. It is designed for use in space-constrained applications, making it a great choice for mobile devices.

To recap, the AP7381-28Y-13 is a Linear PMIC voltage regulator from Diodes Corporation that is capable of providing an adjustable output voltage ranging from 1.8V to 5.5V with a maximum output current of 1.5A and a high operating frequency of up to 2.8 MHz. It uses a two-transistor design and provides short-circuit protection and thermal shutdown. It is especially suitable for high-current applications that require fast response times and is a great choice for mobile devices due to its space-saving design.

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