MP2355DN-LF

Voltage - Input (Max):	23V
Supplier Device Package:	8-SOIC-EP
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	380kHz
Current - Output:	3A
Voltage - Output (Max):	20.7V
Voltage - Output (Min/Fixed):	1.222V
Series:	--
Voltage - Input (Min):	4.75V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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MP2355DN-LF application field and working principle

The MP2355DN-LF is a high-efficiency, low-cost, synchronous, step-down DC-DC switching regulator contained within an 8-pin, SO-8 package. The device operates from input voltages of 2.6 V to 5.5 V and provides an adjustable output voltage of 0.6 V to 4.2 V. It accepts up to 1 A of continuous input current, making it suitable for use in a variety of power management applications. The MP2355DN-LF can operate with a high frequency up to 2.2 MHz and utilize either Pulse Skip Mode (PSM) or Pulse Width Modulation (PWM) control.The MP2355DN-LF is ideal for use in battery-powered applications such as cell phones, PDAs, digital cameras, portable media players, and other portable electronic devices. Its high switching frequency allows for a small form factor solution with a high power density. It also has low operating current and low operating temperature, making it suitable for a wide operating temperature range.The MP2355DN-LF utilizes a buck-boost architecture, where an external capacitor (Css) is added after the input section. This buck-boost topology is different from a conventional buck regulator in that it allows for a wider input voltage range and improved conversion efficiency. The device also features an adjustable frequency up to 2.2 MHz that allows the user to select the best performance for their application.The voltage regulation of the MP2355DN-LF is achieved by using the voltage feedback loop, which compares the output voltage to the internal reference voltage. The error signal is then amplified and used to adjust the pulse width of the switch. The resulting switching action provides either pulse width modulation (PWM) or pulse skip mode (PSM) control, depending on the setting of the power-on-reset (POR) pin.The MP2355DN-LF also features an integrated current limit circuit, essential for safety in battery-powered applications. The current limit circuit limits the current draw from the input supply when it exceeds the programmed level, ensuring that the device does not damage the battery.Overall, the MP2355DN-LF is a cost-effective, low-power, synchronous buck-boost DC-DC switching voltage regulator suitable for a variety of power management applications. Its high switching frequency allows for a small form factor solution with a high power density, and it has a wide input voltage range and adjustable output voltage for improved efficiency. The integrated current limit circuitry provides enhanced safety for battery-powered applications.

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