MP4559 Step-Down Converters

Monolithic Power Systems (MPS) MP4559 Step-Down Converters are high-frequency switching regulators with an integrated high-side, high-voltage power MOSFET. The MP4559 series delivers 1.5A output with current mode control for a fast loop response and easy compensation. The wide input range of 3.8V to 55V accommodates many step-down applications, including automotive input environments. 12µA quiescent current in shutdown mode makes the MP4559 series suitable for battery-powered applications. Higher power conversion efficiency is achieved over a wide load range by scaling down the switching frequency under light load conditions.

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Description Datasheet Availability Pricing (RON) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Mounting Style
Package/Case
Topology
Output Voltage
Output Current
Number of Outputs
Quiescent Current
Switching Frequency
Minimum Operating Temperature
Maximum Operating Temperature
Series
Packaging
Monolithic Power Systems (MPS) Switching Voltage Regulators 1.5A, 2MHz, 55V Buck Converter
Datasheet
960In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 500
SMD/SMT QFN-10 Buck 800 mV to 52 V 1.5 A 1 Output 140 uA 2 MHz - 40 C + 125 C MP4559 Reel, Cut Tape, MouseReel
Monolithic Power Systems (MPS) Switching Voltage Regulators 1.5A, 2MHz, 55V Buck Converter
Datasheet
5.918Expected 4/13/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 2.500

SMD/SMT SOIC-EP-8 Buck 800 mV to 52 V 1.5 A 1 Output 140 uA 1 MHz - 40 C + 125 C MP4559 Reel, Cut Tape, MouseReel
Monolithic Power Systems (MPS) Switching Voltage Regulators 1.5A, 2MHz, 55V Buck Converter
Datasheet
Non-Stocked Lead-Time 14 Weeks
Min.: 5.000
Mult.: 5.000
Reel: 5.000

SMD/SMT QFN-10 Buck 800 mV to 52 V 1.5 A 1 Output 140 uA 2 MHz - 40 C + 125 C MP4559 Reel