MPQ4559DN-LF-Z

Voltage - Input (Max):	55V
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 ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	Up to 2MHz
Current - Output:	1.5A
Voltage - Output (Max):	52V
Voltage - Output (Min/Fixed):	0.8V
Series:	--
Voltage - Input (Min):	3.8V
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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PMIC - Voltage Regulators - DC DC Switching Regulators

The MPQ4559DN-LF-Z is a multi-output synchronous step-down voltage regulator offering highly efficient power conversion and excellent power supply line and load transient response. Its small form factor and wide input voltage range make it ideal for applications requiring a high efficiency and small footprint, while its operating temperature range makes it suitable for a broad range of applications.

Features

The MPQ4559DN-LF-Z provides a wide input voltage range, from 4.5 to 40V, and supports output current up to 16A per output. It also offers a wide range of output voltage levels and adjustable output voltage choices. The device includes two separate output switches to enable two independent regulators, allowing for independent output voltage control of each regulator. The high switching frequency (<1MHz) allows for a small external filter for output ripple suppression.The MPQ4559DN-LF-Z features a step-down switching regulator with synchronous rectification and current mode control architecture. The device allows for pre-programmed output voltages and adjustable output voltages via external resistors. The device also features over current protection and short circuit protection.

Application Fields

The MPQ4559DN-LF-Z is designed for applications such as PCs, servers, networking devices, and in particular, applications with multiple load requirements. The device\'s wide input voltage range allows it to be used in industrial, automotive and medical applications as well.

Working Principle

The MPQ4559DN-LF-Z synchronous step-down voltage regulator operates on the principle known as voltage mode control. The device is configured with two separate output switches and two independent regulators; this allows the device to control two outputs individually. The device also includes a current mode control to ensure stable operation.When the voltage applied to the input of the MPQ4559DN-LF-Z is greater than the target output voltage, the device will switch from one output to the other at a rate determined by the switching frequency. This ensures that the output voltage remains constant regardless of the input voltage. During the time the current mode control is enabled, the device monitors the output current. When the output current reaches a predetermined level, the current mode control will adjust the output voltage by regulating the switching of the two output switches.The MPQ4559DN-LF-Z is a highly efficient device, offering up to 94% efficiency in optimal conditions. It also features low standby current consumption and high system power density, making it an ideal choice for applications with stringent power requirements such as computers and networking equipment.

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