MP28259DD-LF-P

Voltage - Input (Max):	20V
Supplier Device Package:	12-QFN (2x3)
Package / Case:	12-TFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	--
Current - Output:	2A
Voltage - Output (Max):	13V
Voltage - Output (Min/Fixed):	0.815V
Series:	--
Voltage - Input (Min):	4.2V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MP28259DD-LF-P DC DC Switching Regulator Application Field and Working Principle

The MP28259DD-LF-P from Monolithic Power Systems is a step-down switching regulator that provides high efficiency, wide input voltage range and easy-to-design features, ideal for many types of applications. It provides effective output current up to 2A. This offline converter has a wide 4.5V to 42V input voltage range and a PWM, PFM (auto switchable) transient control scheme that allows it to work with low demand and battery operated targets.

Features of MP28259DD-LF-P

* Maximum input voltage of 42V* Output voltage adjustable from 0.8V to 5.0V* Built-in Power MOSFET with peak current of 2A* Maximum operating frequency of 1.5MHz

Application of MP28259DD-LF-P

The MP28259DD-LF-P step-down DC-DC converter can be used in many different applications that require low power and high efficiency. It is ideal for powering small battery operated devices such as wireless sensor nodes and devices based on smart home technologies. It can also be used in motorized applications such as robotics and automotive applications. The device is also suitable for applications in MP3 players, tablets, notebook computers, mobile phones and other personal electronics.

MP28259DD-LF-P Working Principle

The MP28259DD-LF-P operates in either PFM or PWM mode, depending on the load requirements. Initially the device runs in PFM mode with a fixed duty cycle to achieve high efficiency for light load conditions. As the load increases the duty cycle increases to extract more power from the input source to meet the increased load. The operating frequency is fixed by an external capacitor. The switching frequency is adjusted automatically depending on the load current and MOSFET characteristics.The MP28259DD-LF-P also features a low-power auto-sleep mode where the device can enter a low power mode when the output voltage drops below a certain level. In auto-sleep mode the device will shut down automatically if the output voltage drops below a fixed level.

Conclusion

The MP28259DD-LF-P switching regulator from Monolithic Power Systems combines high performance with high efficiency and easy to use features to make it ideal for many applications. It features a wide voltage range, low power mode and adjustable switching frequency to meet the needs of different applications. Its small size, high power output and low power mode makes it ideal for battery powered applications and other small, portable devices.

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