MP8736

High Efficiency, Fast Transient, 6A, 19V

Synchronous Buck Converter in a

Tiny QFN20 (3x4mm) Package

MP8736 Rev. 1.34

www.MonolithicPower.com

1

4/18/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP8736 is a fully integrated high frequency

synchronous rectified step-down switch mode

converter. This device integrates a 12mΩ low-

side FET and a 30mΩ high-side FET in a

monolithic die. The MP8736 operates with high

efficiency over a wide output current load range.

Constant-On-Time

(COT)

control

mode

provides fast transient response and eases loop

stabilization. The MP8736 has a programmable

frequency pin to optimize system performance.

Full protection features include SCP, OCP, OVP,

UVP and thermal shut down.

The MP8736 requires a minimum number of

readily available standard external components

and is available in a space saving QFN20

(3x4mm) package.

FEATURES

• Wide 4.5V to 19V Operating Input Range

• 6A Output Current

• Integrated 30mΩ High-Side, 12mΩ Low-

Side Power MOSFETs

• Proprietary Switching Loss Reduction

Technique

• 1% Reference Voltage

• Programmable Soft Start Time

• Soft Shutdown

• SCP, OCP, OVP, UVP Protection and

Thermal Shutdown

• Available in a QFN20 (3x4mm) Package

• 100kHz to 2.5MHz switching frequency*

APPLICATIONS

•

Networking Systems

•

Broadband/Optical Communication

Systems

•

Distributed Power and Point of Load

Systems

All MPS parts are lead-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.

*switching frequency is only limited by on-time and is application specific

TYPICAL APPLICATION

5

4

3

2

7

9,10,17,18

1

20

8,19

11-16

IN

VCC

C10

10nF

PGOOD

FREQ

EN

PGND

AGND

SS

SW

FB

BST

100pF

R1

R2

40.2

R14

100

L2

MP8736

VIN

EN

VOUT 1.05V

R7

Efficiency

0

10

20

30

40

50

60

70

80

90

100

0.01

0.1

1

6