MP4541

80V, 0.8A, High-Efficiency,

Synchronous, Step-Down Converter

with Integrated Power MOSFETS

MP4541 Rev. 1.0

MonolithicPower.com

1

5/28/2021

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© 2021 MPS. All Rights Reserved.

DESCRIPTION

The MP4541 is a high-efficiency, synchronous

step-down converter with integrated power

MOSFETs. The device provides 0.8A of output

current (IOUT) in a buck topology from an input

power supply of up to 80V.

The MP4541 features constant-on-time (COT)

control, which provides fast transient response

and

facilitates

loop

stabilization.

The

configurable operation frequency can be set

between 100kHz and 1MHz via an external

resistor.

The device supports high-efficiency pulse-skip

mode (PSM) while operating under light-load

conditions. The valley current limit circuits

protect

against

overload

and

short-circuit

conditions.

The MP4541 is available in an SOIC-8EP

package.

FEATURES

 8V to 80V Input Voltage Range

 1V to 30V Output Voltage Range

 90% Maximum Operation Duty Cycle

 625mΩ/265mΩ Internal Power MOSFETs

 Constant-On-Time (COT) Control

 100kHz to 1MHz Configurable Frequency

 Internal Soft Start and Loop Compensation

 Over-Current Protection (OCP)

 Short-Circuit Protection (SCP) with Hiccup

Mode

 High-Efficiency Pulse-Skip Mode (PSM)

under Light-Load Conditions

 Available in an SOIC-8EP Package

APPLICATIONS

 High-Voltage Battery Packs

 Industrial Power Supplies

 Printer Power Boards

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.

For MPS green status, please visit the MPS website under Quality

Assurance.

“MPS”, the MPS logo, and “Simple, Easy Solutions” are

registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries.

TYPICAL APPLICATION

VIN

SW

BST

FB

VOUT

GND

VIN

8V to 80V

R1

40.2k

Ω

R2

10k

Ω

5V/0.8A

L1 33

μH

C3

0.1

μF

EN

VCC

C4

1

μF

R3

80.6k

Ω

FREQ

C1

2.2

μF

C2

10

μF x 2

C5

680pF

MP4541

On/Off

Efficiency

VOUT = 5V

40

50

60

70

80

90

100

0

0.2

0.4

0.6

0.8

OUTPUT CURRENT (A)

Vin=12V

Vin=48V

Vin=72V