MCP1642BT-30I/MS

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The MCP1642BT-30I/MS is a type of device discussed in the context of PMIC, voltage regulators, and DC DC switching regulators. This device serves several applications and utilizes a particular design process to control the output current. It is ideal for low-power and single-output applications. In this article, we will be discussing the MCP1642BT-30I/MS application field, working principle, and components.

MCP1642BT-30I/MS Application Field

The MCP1642BT-30I/MS is an ideal voltage regulator for applications such as Cellular Base Stations, Rail Control Systems, Radio Frequency (RF) in-Vehicle Monitors, and Optical Networking Systems. It is designed for low power, single output, rated for up to 5v and a maximum output current of 30mA, and supports a wide input voltage range of 2.5v to 5.5 v. This device also features a low output voltage ripple, and it is especially ideal for environments that require a low noise operation and higher efficiency.

MCP1642BT-30I/MS Working Principle

The MCP1642BT-30I/MS voltage regulator follows a hysteretic approach known as Buck-Boost, which allows it to shift between Buck and Boost modes depending on the input and output conditions. In terms of its internal circuitry, the MCP1642BT-30I/MS is composed of an internal error amplifier, designed for voltage and current regulation, a synchronous rectifying FET and two low-pass filter capacitors.

The internal error amplifier senses any differences between the VIN and VOUT pins, and adjusts its duty cycle accordingly, to regulate the output voltage. When the difference is higher, the internal error amplifier increases its duty cycle, leading to a higher output current. When the difference between the VIN and VOUT decreases, the internal error amplifier shortens its duty cycle and the output current decreases.

The MCP1642BT-30I/MS also features Current Limit and Thermal Shutdown protection via the ITHERM pin. The thermal shutdown prevents any damage when the temperature inside the device rises to a critical point. With the current limit protection, it shuts down the device when the current exceeds a set point. As a result, the MCP1642BT-30I/MS produces a regulated output and offers superior performance than other linear regulators.

MCP1642BT-30I/MS Components

The MCP1642BT-30I/MS is composed of two main components: the main control FET and the low-pass filter capacitor. The FET is responsible for controlling the output current and is utilized with a synchronous rectifying architecture. It has a maximum ON resistance of 11mΩ max at 4v and is optimized for high efficiency. The second component is the low-pass filter capacitor, which smooths out the current ripple in the output. The filter capacitor is a 2.2μF ceramic capacitor, and together with the FET forms the switch mode regulator.

The MCP1642BT-30I/MS is an ideal device for low power and single-output applications. It features a low output voltage ripple, and it is especially useful in environments that require a low noise operation and higher efficiency. In terms of components, the MCP1642BT-30I/MS is composed of a main control FET and a low-pass filter capacitor. It follows an hysteretic approach known as Buck-Boost, and regulates the output current with an internal error amplifier. With several protection features incorporated, it provides a simple and efficient solution for several applications.

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