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MA5801

Major Power Technology Co., Ltd.

Rev.1.2

28th, Sep., 2021

58V Asynchronous Buck Converter

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GENERAL DESCRIPTION

The MA5801 is a monolithic asynchronous buck regulator. The device integrates 110mΩ

MOSFET, and provides 2A of continuous load current over a wide input voltage of 10V to 58V.

Current mode control provides fast transient response and cycle-bicycle current limit.

The internal soft-start function prevents inrush current at turn-on. This device, available in an

SOP8L-EP (Exposed pad) package, provides a very compact solution with minimal external

components.

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FEATURES

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Wide 10V to 58V Operating Input Range

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Integrated 110mΩ P-channel MOSFET Switches

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Output Adjustable : VFB(1.00V±2%)

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Up to 93% Efficiency

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Internal Soft-Start

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Fixed 240KHz Frequency

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Cycle-by-Cycle Over Current Protection

-

Input Under/Over Voltage Lockout

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APPLICATION CIRCUIT

VIN

EN

VDD

GND

HGC

SW

FB

COMP

INPUT

10V~58V

C5

0.1uF

L1

33μH

R1

18kΩ

R2

10kΩ

CFF 3.3nF

OUTPUT

5V 2.0A

C3

R3

C7

0.1μF

C1

4.7μF

MA5801

3.3nF

15kΩ

PAD

D1

SS36

C2

100μF

63V

330μF

C8

C4

0.1μF

Option

ON

R6

C9

0.1μF

40kΩ

OFF

VOUT=VFB × (1+R1/R2), VFB = 1.00V, R2 suggest 1k~20kΩ