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MPQ4558

1A 2MHz 55V Step-Down Converter Light-Load Efficiency

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MPQ4558

MPQ4558

1A 2MHz 55V Step-Down Converter Light-Load Efficiency

Datasheet

Description

The MPQ4558 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 4.5V-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 MPQ4558 can prevent EMI (electromagnetic interference) noise problems, such as those found in AM radio and ADSL applications. The MPQ4558 is available in an SOIC8E and a 10-pin 3mm x 3mm QFN package. These MPQ parts target Automotive system and Industrial power system applications.

Features & Benefits

Guaranteed Industrial/Automotive Temperature Range Limits
Wide 4.5V-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
AEC-Q100 Qualified in QFN package

Active Part Numbers:

MPQ4558DN-LF-P MPQ4558DN-LF-Z MPQ4558DQ-LF-P MPQ4558DQ-LF-Z

Meaning of P & Z

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*Based on Nominal Values

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3D Models (15)

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Standard Pricing

In stock

MPQ4558DQ-LF-Z MPQ4558DQ-LF-P

Package: QFN-10 (3x3)

5,000 per Reel

Buy Now Price $1.91 1K

Quantity Unit Price
1

$3.47
10

$3.11
100

$2.56
250

$2.42
500

$2.17
1K

$1.91

Special Pricing Available for
Larger Quantities Quote

In stock now: 100

Order now, up to 100 estimated to ship by 27 Jun, 2025

Lead Time For Additional Quantities

Additional quantities estimated to ship by 12 Oct, 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

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MPQ4558DN-LF-Z MPQ4558DN-LF-P

Package: QFN-10 (3x3)

2,500 per Reel

Buy Now Price $1.63 1K

Quantity Unit Price
1

$3.47
10

$3.11
100

$2.56
250

$2.42
500

$2.17
1K

$1.63

Special Pricing Available for
Larger Quantities Quote

In stock now: 100

Order now, up to 100 estimated to ship by 27 Jun, 2025

Lead Time For Additional Quantities

Additional quantities estimated to ship by 12 Oct, 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

Questions answered by MPS engineers in 24h

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All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.

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