MP8774

12A, Wide Input 3V-18V, 700kHz Synchronous

Step-Down Converter with PG and External

Soft Start in 3x3mm QFN package

MP8774 Rev. 1.0

www.MonolithicPower.com

1

1/15/2018

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

© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MP8774 is a fully integrated high-frequency,

synchronous, rectified, step-down, switch-mode

converter with internal power MOSFETs. The

MP8874 offers a very compact solution that

achieves 12A of continuous output current with

excellent load and line regulation over a wide

input range. The MP8774 uses synchronous

mode operation for higher efficiency over the

output current load range.

Constant-on-time

(COT)

control

operation

provides very fast transient response, easy loop

design, and very tight output regulation.

Full protection features include short-circuit

protection (SCP), over-current protection (OCP),

under-voltage protection (UVP), and thermal

shutdown.

The MP8774 requires a minimal number of

readily

available,

standard,

external

components and is available in a space-saving

QFN-16 (3mmx3mm) package.

FEATURES

 Output Adjustable from 0.6V

 Wide 3V to 18V Operating Input Range

 12A Output Current

 16mΩ/5.5mΩ Low R

MOSFETs

 100μA Quiescent Current

 High-Efficiency Synchronous Mode

Operation

 Pre-Biased Start-Up

 Fixed 700kHz Switching Frequency

 External Programmable Soft Start-Up Time

 Enable (EN) and Power Good (PG) for

Power Sequencing

 Over-Current Protection (OCP) and Hiccup

 Thermal Shutdown

 Available in a QFN-16 (3mmx3mm)

Package

APPLICATIONS

 Security Cameras

 Portable Devices, XDSL Devices

 Digital Set-Top Boxes

 Flat-Panel Television and Monitors

 General Purpose

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

VIN

VCC

PG

ENABLE

FB

SS

EN

C5

22nF

PG

VIN

C1

22µFx2

SW

BST

C3

0.1µF

VOUT

C2

22µFx4

R1

20k

Ω

R2

30k

Ω

1V/12A

C4

1µF

L1

0.56µH

MP8774

3V-18V

R4

1k

Ω

Efficiency vs. Load Current

μH, DCR = 1.5mΩ

60

65

70

75

80

85

90

95

100

0

2

4

6

8

10

12

LOAD CURRENT(A)

VIN=3.3V

VIN=5V

VIN=12V