MCP16321T-500E/NG

Voltage - Output (Min/Fixed):	5V
Base Part Number:	MCP16321
Supplier Device Package:	16-QFN (3x3)
Package / Case:	16-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	1A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	24V
Voltage - Input (Min):	6V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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MCP16321T-500E/NG application field and working principle
The MCP16321T-500E/NG is a Pulse Width-Modulated (PWM) DC-DC switching regulator, belonging to the group known as “PMIC - Voltage regulators - DC-DC Switching regulators”. It is a monolithic integrated circuit that can supply up to 400mA of current, and also providing protection against overloads and short circuits.This device can be used in a variety of applications, including automotive, consumer, industrial and healthcare applications. It is also suitable for Lithium-Ion (Li-Ion) battery-powered applications, such as mobile handsets, digital cameras and other portable devices that require a stable, regulated voltage.With the MCP16321T-500E/NG, designers can take advantage of its high-efficiency operation, and can easily build a simple and reliable power supply with very low external parts count. The device operates from a wide input voltage range of 3 V to 24 V, providing a fixed output voltage of 3.3 V or 5 V. When operating at full load, it achieves high efficiency of up to 95%. This makes it an ideal choice for battery-powered applications.The MCP16321T-500E/NG also features protection features such as an over-voltage protection (OVP), under-voltage protection (UVP) and thermal shutdown. In addition, it has a current limit set-point that can be programmed by an external resistor, allowing the user to limit current to an adjustable limit, thus providing overload and short-circuit protection.In terms of working principle, the MCP16321T-500E/NG is based on a buck topology converter, with a fixed frequency pulse width modulator connected to the switch node. The pulse-width modulator generates a pulse-width modulated (PWM) signal for the switch (which is generally a MOSFET). The duty cycle of this signal is regulated so that the output voltage of the converter is held at the desired voltage. When the duty cycle is adjusted, the amount of current that can be drawn is also changed.In summary, the MCP16321T-500E/NG is a high-efficiency, easy to use DC-DC switching regulator, suitable for a variety of different applications. Its wide input voltage range, adjustable current limit and protection features provide added safety and reliability. Designers of portable, battery-powered applications can benefit from the high efficiency of the device, while its monolithic integrated circuit construction provides a compact solution.

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