MP8763

High Efficiency, 12A, 18V,

Synchronous, Step-Down Converter

MP8763 Rev. 1.3

www.MonolithicPower.com

1

6/21/2016

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

© 2016 MPS. All Rights Reserved.

The

Future

of

Analog

IC

T

echnology

DESCRIPTION

The

MP8763

is

a

fully-integrated,

high-

frequency, synchronous, rectified, step-down,

switch-mode converter. It offers a very compact

solution to achieve a 12A output current over a

wide input-supply range with excellent load and

line regulation. The MP8763 operates at high

efficiency over a wide output-current load range.

The MP8763 uses Constant-On-Time (COT)

control mode to provide fast transient response

and ease loop stabilization.

An external resistor programs the operating

frequency

from

200kHz

to

1MHz.

The

frequency stays nearly constant as the input

supply

varies

with

the

feed-forward

compensation.

The default under voltage lockout threshold is

internally set at less than 4.1V, but a resistor

network on the enable pin can increase this

threshold. The soft start pin controls the output

voltage startup ramp. An open drain power

good signal indicates that the output is within

nominal voltage range.

It has full integrated protection features that

include

over-current

protection,

over-voltage

protection and thermal shutdown.

The MP8763 is available in a 3mm×4mm QFN

package, and requires a minimal number of

readily-available components.

FEATURES

•

2.5V to 18V Operating Input Range with

External 5V Bias

•

4.5V to 18V Operating Input Range with

Internal Bias

•

12A Output Current

•

•

Proprietary Switching-Loss-Reduction

Technique

•

Adaptive COT for Ultrafast Transient

Response

•

1% Reference Voltage Over Junction

Temperature Range (0°C to +125°C)

•

Programmable Soft-Start Time

•

Pre-Bias Start-Up

•

Programmable Switching Frequency from

200kHz to 1MHz

•

Non-Latch OCP, OVP, and Thermal

Shutdown

•

Output Adjustable from 0.611V to 13V

APPLICATIONS

•

Set-Top Boxes

•

XDSL Modem/DSLAM

•

Small-Cell Base Stations

•

Personal Video Recorders

•

Flat-Panel Televisions and Monitors

•

Distributed Power Systems

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

directive. For MPS green status, please visit MPS website under Quality

Assurance.

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

Trademarks of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

30

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50

60

70

80

90

100

0.01

0.1

1

10

100