MP4568

60V, 100mA Synchronous

Step-Down Converter

MP4568 Rev. 1.01

www.MonolithicPower.com

1

8/18/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

DESCRIPTION

The MP4568 is a high-frequency, step-down,

switching

regulator

with

integrated

high-

side/low-side, high-voltage power MOSFETs. It

provides a highly efficient output of up to

100mA.

60V rated MOSFETs and 4.5V to 45V operation

range accommodates a variety of step-down

applications in automotive input environment. A

5

μA shutdown mode quiescent current allows

use in battery-powered applications.

It allows for high power conversion efficiency

over a wide load range by scaling down the

switching frequency under light-load condition

to reduce the switching and gate driver losses.

The switching frequency during start-up and

short circuit also can be scaled down to helps

prevent inductor current runaway. Thermal

shutdown

provides

reliable,

fault-tolerant

operation.

The MP4568 is available in a 3mmx3mm

QFN10 package.

FEATURES

 20μA Quiescent Current

 Wide 4.5V to 45V Operating Range with 50V

Input OVP

 60V Integrated MOSFETs with 0.7Ω and

2.25Ω Ron

 Programmable Switching Frequency

 Stable with Ceramic Output Capacitors

 Low Output Ripple

 Programmable Soft-Start

 Adjustable Input UVLO Hysteresis

 Precision Peak Current Limit without

Current-Sensing Resistor

 Programmable Peak Current Limit

 >90% Efficiency at 10V VIN to 5V V

 1.0V Feedback Reference Voltage

 Low Shutdown Mode Current: <5μA

 3mmx3mm QFN10 Package

APPLICATIONS

 4mA to 20mA Current Loops

 Automotive Systems

 Industrial Power Systems

 Distributed Power Systems

 Battery Powered Systems

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

VIN

EN

C1

SW

2

EN

9

ENHY

8

ILIM

6

IN

10

FB

5

BIAS

4

MP4568

SS

7

U1

R3

C2

L1

C3

VOUT

5V/100mA

2M

10uF

22uF

100uH

0.1uF

R1

300k

R2

1.2M

R4

100k