MP8675

6A, 42V, 420kHz Step-Down Converter

with Synchronizable Gate Driver

MP8675 Rev.1.2

www.MonolithicPower.com

1

1/26/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP8675 is a monolithic step-down switch

mode converter with a built in, internal high-side

power MOSFET. It achieves 6A continuous

output current over a wide input supply range

with excellent load and line regulation.

Current mode operation provides fast transient

response and eases loop stabilization.

Fault condition protection includes cycle-by-cycle

current limiting and thermal shutdown.

The MP8675 requires a minimum number of

readily available standard external components

and is available in an 8-pin SOIC package with

exposed pad.

FEATURES

• Wide 4.5V to 42V Operating Input Range

• 6A Continuous Output Current

• 100mΩ Internal Power MOSFET Switch

• Synchronizable Gate Driver Delivers up to

95% Efficiency

• Fixed 420kHz Frequency

• Synchronizable up to 1.5MHz

• Over Current Latch Off Protection

• Thermal Shutdown

• Output Adjustable from 0.8V

• Stable with Low ESR Output Ceramic

Capacitors

• Available in a Thermally Enhanced 8-Pin

SOIC Package

APPLICATIONS

•

Digital Set Top Boxes

•

Personal Video Recorders

•

Broadband Communications

•

Flat Panel Television and Monitors

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP8675

SW

BG

FB

BST

1

4

6

5

2

GND

IN

VCC

EN/SYNC

8

3

7

OFF ON

60

65

70

75

85

80

90

95

100

OUTPUT CURRENT (A)

Efficiency vs.

Output Current

02

15

4

36

7