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MP4558

1A, 2MHz, 55V Step-Down Converter with Superior Light-Load Efficiency. Available in Automotive (AEC-Q100) and Industrial Grade

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MP4558

MP4558

1A, 2MHz, 55V Step-Down Converter with Superior Light-Load Efficiency. Available in Automotive (AEC-Q100) and Industrial Grade

Datasheet

Description

The MP4558 is a high-frequency, step-down switching regulator with an integrated internal high-side high-voltage power MOSFET. It provides up to a 1A 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 automotive input. A 12µA shutdown-mode supply current makes it suitable for battery-powered applications. A scaled-down switching frequency in light-load conditions provides high power-conversion efficiency over a wide load range while reducing switching and gate driver losses. The frequency fold-back prevents inductor current runaway during startup and thermal shutdown provides reliable, fault-tolerant operation. By switching at 2MHz, the MP4558 can prevent EMI (electromagnetic interference) noise problems, such as those found in AM radio and ADSL applications. The MP4558 is available in an SOIC8E and a 10-pin 3mm x 3mm QFN package.

Features & Benefits

Wide 3.8V-to-55V Operating Input Range
250mΩ Internal Power MOSFET
Up to 2MHz Programmable Switching Frequency
140μA Quiescent Current
Stable with Ceramic Capacitors
Internal Soft-Start
Up to 95% Efficiency
Output Adjustable from 0.8V to 52V
Available in SOIC8E and 3mm x 3mm QFN10 Packages

Active Part Numbers:

MP4558DN-LF-P MP4558DN-LF-Z MP4558DQ-LF-P MP4558DQ-LF-Z

Meaning of P & Z

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*Based on Nominal Values

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Standard Pricing

In stock

MP4558DQ-LF-Z MP4558DQ-LF-P

Package: QFN-10 (3x3)

5,000 per Reel

Buy Now Price $1.49 1K

Quantity Unit Price
1

$2.78
10

$2.30
100

$1.90
250

$1.76
500

$1.53
1K

$1.49

Special Pricing Available for
Larger Quantities Quote

In stock now: 1,500

Order now, up to 1,500 estimated to ship by 25 Jul, 2025

Lead Time For Additional Quantities

Additional quantities estimated to ship by 09 Nov, 2025

Arrives 3-4 business days. Shipping only $5 per order.

200 Max per Company.
Limited Inventory to support product development.

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MP4558DN-LF-Z MP4558DN-LF-P

Package: QFN-10 (3x3)

2,500 per Reel

Buy Now Price $1.34 1K

Quantity Unit Price
1

$2.73
10

$2.03
100

$1.67
250

$1.58
500

$1.45
1K

$1.34

Special Pricing Available for
Larger Quantities Quote

In stock now: 100

Order now, up to 100 estimated to ship by 25 Jul, 2025

Lead Time For Additional Quantities

Additional quantities estimated to ship by 09 Nov, 2025

Arrives 3-4 business days. Shipping only $5 per order.

100 Max per Company.
Limited Inventory to support product development.

MPS Pay: Pay by Invoice Net30 Terms Learn More

Create myMPS+ account for Free Samples

Technical Forum

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