MPQ8636GV-20-Z

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MPQ8636GV-20-Z Application Field and Working Principle

The MPQ8636GV-20-Z is part of the MPQ8636GV family, which is a DC/DC switching regulator, and is classified as a PMIC – Voltage Regulators – DC DC Switching Regulators. The MPQ8636GV-20-Z is a highly efficient switching regulator specially designed for applications with demanding power and thermal requirements. It is ideal for use in distributed power systems, point-of-load (POL) converters, POL DC/D waste power systems, and power-over-Ethernet applications.

Features

The MPQ8636GV-20-Z features a wide input voltage range of 0.95V to 18V. It is capable of delivering up to 20MHz of pulse frequency, and has an adjustable output voltage range between 0.02V and 0.95V. It also has an operating temperature range of -40°C to +105°C. The device is also RoHS compliant, and is available in a 14-pin LLP package.

Applications

The most common applications for the MPQ8636GV-20-Z include but not limited to:

• Power over Ethernet (PoE) systems
• Distributed power systems
• Point-of-load (POL) converters
• DC/DC power converters

Working Principle

The working principle of the MPQ8636GV-20-Z is based on the Pulse-width Modulation (PWM) technique. The device consists of an on-chip switching transistor and an on-chip current sensing circuit. The voltage at the load is monitored by the current sensing circuit and as it increases, the PWM control circuit reduces the duty cycle of the switching transistor, thereby decreasing the voltage at the load. This process is repeated in an iterative fashion until the desired voltage is achieved.

The MPQ8636GV-20-Z has two operational modes: constant frequency (CF) mode and constant-on-time (COT) mode. In CF mode, the switching frequency is kept constant and the duty cycle is adjusted to achieve the desired output voltage. In COT mode, the duty cycle is kept constant and the switching frequency is adjusted in order to achieve the desired output voltage.

Conclusion

The MPQ8636GV-20-Z is a highly efficient DC/DC switching regulator, which is specially designed for applications with demanding power and thermal requirements. It has a wide input voltage range and adjustable output voltage range between 0.02V and 0.95V. In addition, it has two operational modes, CF mode, and COT mode. The most common applications include, but are not limited to, power over Ethernet (PoE) systems, distributed power systems, point-of-load (POL) converters, and DC/DC power converters.

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