MP28257DD-LF-Z Application Field and Working Principle

The MP28257DD-LF-Z is an advanced DC-DC switching regulator designed by Monolithic Power Systems (MPS). It is specifically intended for regulated and adjustable power supply applications and can support up to 5.5V output voltage with 6A max switching current. The MP28257DD-LF-Z works by using inductive and capacitive elements to store and convert energy to regulate and maintain a consistent output voltage.

Application Field

The MP28257DD-LF-Z is a highly efficient and cost-effective DC-DC switching regulator suitable for a wide variety of applications, including:

• Data center and server power conversion
• Battery-powered equipment
• LED lighting systems
• Wireless power transmissions
• Networked power supplies
• Industrial control systems
• Automotive electronics

The MP28257DD-LF-Z is also a great choice for applications that require a high power output and excellent power efficiency. This low profile seamless DC-DC switching regulator will keep the output voltage at a constant level for more consistent performance.

Key Features

• High power output up to 6A Max
• Excellent power efficiency up to 95%
• Wide input voltage range (5.5V to 26V)
• Low profile Regulation scheme (up to 0.5V)
• Seamless switching with built-in synchronous rectifier
• Programmable output voltage

Working Principle

The MP28257DD-LF-Z is a DC-DC switching regulator which minimizes power losses caused by the process of converting input voltage to a suitable output voltage. This is done by using an energy storage inductor and an energy storage capacitor. This regulator switches the current through an internal synchronous rectifier which rectifies the current to DC and regulates the output voltage to a constant level.

The synchronous rectifier reduces losses by eliminating the “catch-diode” which is typically used when only an inductor is used as the current is not able to flow freely through the diode. This scheme also improves the power efficiency of the regulator.

The MP28257DD-LF-Z works by controlling the switch current with a pulse width modulation (PWM) circuit that drives the power switch. The PWM control circuitry receives feedback from the output voltage and adjusts the on-time of the switch to maintain the output voltage at a constant level. The circuit also features an adjustable output voltage option as well as soft-start and overload/overvoltage protections.

The MP28257DD-LF-Z is a highly efficient and cost-effective DC-DC switching regulator that is suitable for a wide variety of applications. It provides excellent power efficiency and a low profile regulation scheme ideal for applications requiring the highest level of power output.