Integrated Circuits (ICs)

MPQ4559DQ-LF-Z

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Monolithic Power Systems Inc.

SWITCHING VOLTAGE REGULATORS 1.5A, 2MHZ, 55V BUCK CONVERTER

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Integrated Circuits (ICs)

MPQ4559DQ-LF-Z

Active

Monolithic Power Systems Inc.

SWITCHING VOLTAGE REGULATORS 1.5A, 2MHZ, 55V BUCK CONVERTER

Deep-Dive with AI

DocumentsDatasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	MPQ4559DQ-LF-Z

Current - Output	1.5 A
Frequency - Switching [Max]	2 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	10-VFDFN Exposed Pad
Supplier Device Package	10-QFN (3x3)
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	55 V
Voltage - Input (Min) [Min]	3.8 V
Voltage - Output (Max) [Max]	52 V
Voltage - Output (Min/Fixed)	0.8 V

MPQ4559 Series

Part	Output Configuration	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Mounting Type	Voltage - Output (Max) [Max]	Package / Case	Voltage - Input (Max) [Max]	Topology	Voltage - Output (Min/Fixed)	Current - Output	Output Type	Function	Voltage - Input (Min) [Min]	Frequency - Switching [Max]	Qualification	Grade	Package / Case [y]	Package / Case [x]
Monolithic Power Systems Inc. MPQ4559DQ-LF-P	Positive	1	-40 C	125 °C	10-QFN (3x3)	Surface Mount	52 V	10-VFDFN Exposed Pad	55 V	Buck	0.8 V	1.5 A	Adjustable	Step-Down	3.8 V	2 MHz
Monolithic Power Systems Inc. MPQ4559DQ-AEC1-LF-Z	Positive	1	-40 C	125 °C	10-QFN (3x3)	Surface Mount	52 V	10-VFDFN Exposed Pad	55 V	Buck	0.8 V	1.5 A	Adjustable	Step-Down	3.8 V	2 MHz	AEC-Q100	Automotive
Monolithic Power Systems Inc. MPQ4559DN-LF-Z	Positive	1	-40 C	125 °C	8-SOICE	Surface Mount	52 V	8-SOIC Exposed Pad	55 V	Buck	0.8 V	1.5 A	Adjustable	Step-Down	3.8 V	2 MHz			3.9 mm	0.154 in
Monolithic Power Systems Inc. MPQ4559DQ-LF-Z	Positive	1	-40 C	125 °C	10-QFN (3x3)	Surface Mount	52 V	10-VFDFN Exposed Pad	55 V	Buck	0.8 V	1.5 A	Adjustable	Step-Down	3.8 V	2 MHz

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 2.78
		10	$ 2.50
		25	$ 2.36
		100	$ 2.05
		250	$ 1.94
		500	$ 1.74
		1000	$ 1.47
		2500	$ 1.40
	Digi-Reel®	1	$ 2.78
		10	$ 2.50
		25	$ 2.36
		100	$ 2.05
		250	$ 1.94
		500	$ 1.74
		1000	$ 1.47
		2500	$ 1.40
	N/A	4837	$ 2.73
	Tape & Reel (TR)	5000	$ 1.34
Mouser	N/A	5000	$ 1.30

Description

General part information

MPQ4559 Series

The MPQ4559 is a high frequency step-down switching regulator with integrated internal highside high voltage power MOSFET. It provides 1.5A output with current mode control for fast loop response and easy compensation. The wide 3.8V to 55V input range accommodates a variety of step-down applications, including those in automotive input environment. A 12µA shutdown mode supply current allows use in battery-powered applications. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation. By switching at 2MHz, the MPQ4559 is able to prevent EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications. The MPQ4559 is available in small 3mm x 3mm QFN10 and SOIC8 with exposed pad packages.Guaranteed Industrial Temp Range Limits Wide 3.8V to 55V Operating Input Range 250m? Internal Power MOSFET Up to 2MHz Programmable Switching Frequency 140µA Quiescent Current Ceramic Capacitor Stable Internal Soft-Start Up to 95% Efficiency Output Adjustable from 0.8V to 52V Available in QFN (3mm x 3mm) and SOIC8E with Exposed Pad Packages AEC-Q100 Qualified

Documents

Technical documentation and resources