MP3209DGU-LF-Z

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Up
Output Configuration:	Positive
Topology:	Boost
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	2.5V
Voltage - Input (Max):	6V
Voltage - Output (Min/Fixed):	3V
Voltage - Output (Max):	22V
Current - Output:	350mA
Frequency - Switching:	1.4MHz
Synchronous Rectifier:	No
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-UFDFN Exposed Pad
Supplier Device Package:	8-UTQFN (2x2)

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Introduction

The MP3209DGU-LF-Z is a synchronous step-down DC-DC switching regulator from Monolithic Power Systems. As part of their low-voltage family of products, it operates as a microcontroller-based power-management integrated circuit (PMIC). This device is primarily used as a DC-DC voltage regulator or DC-DC boost converter. By modulating its internal switching frequency and duty cycle, it is capable of regulating the output voltage to desired levels.

Application Field of MP3209DGU-LF-Z

The MP3209DGU-LF-Z has several applications in the world of power management. Some of its key applications include:

• Portable applications such as mobile phones, digital cameras, and media players.
• Applications requiring multiple power rails, such as dual-rail power supplies.
• High current applications such as servers, instrumentation systems and video cards with large power demands.
• High frequency switching regulator applications such as low dropout (LDO) regulators and DC-DC buck converters.

Working Principle of MP3209DGU-LF-Z

The MP3209DGU-LF-Z is a synchronous switching regulator. It works by modulating the internal switching frequency and duty cycle to adjust the output voltage. The internal switching frequency is set by a PWM control IC, while the duty cycle is set by an analog signal. The output voltage is then regulated to the desired level by controlling the switching frequency and duty cycle.The MP3209DGU-LF-Z uses a switching topology called step-down or synchronous buck regulator. This topology consists of an external controller and two or more power transistors, connected in a bridge configuration. The external controller is responsible for controlling the internal switching frequency and duty cycle in order to regulate the output voltage.At the start of each cycle, the transistors are switched on for a certain amount of time and at a certain voltage. This voltage is determined by the duty cycle set by the controller. As the cycle progresses, the duty cycle gradually increases, causing the output voltage to rise. When the desired output voltage is reached, the controller signals the transistors to stop switching and the voltage remains constant. The MP3209DGU-LF-Z has an integrated current sensing circuit with a current-limit threshold. When the current-limit threshold is reached, the controller will signal the transistors to stop switching, thus preventing any additional current from flowing through the supply lines.

Conclusion

The MP3209DGU-LF-Z is a synchronous step-down DC-DC switching regulator from Monolithic Power Systems. It is primarily used as a DC-DC voltage regulator or DC-DC boost converter and is capable of regulating the output voltage to desired levels by modulating its internal switching frequency and duty cycle. It has applications in portable devices, dual-rail power supplies, high current applications, and high frequency switching regulator applications. Its switching topology is simple, with external controller and two or more power transistors connected in a bridge configuration. It also has an integrated current sensing circuit with a current-limit threshold that prevents additional current flow when the threshold is reached.

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