MPQ8612

High Efficiency, 12A/16A/20A, 6V

Synchronous Step-down Converter

MPQ8612 Rev. 1.11

www.MonolithicPower.com

1

10/22/2013

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

© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MPQ8612 is fully integrated high frequency

synchronous rectified step-down switch mode

converter. It offers very compact solutions to

achieve 12A/16A/20A output current from a 3V to

6V input with excellent load and line regulation.

Constant-On-Time

(COT)

control

mode

provides fast transient response and eases loop

stabilization. The MPQ8612 can operate with a

low-cost electrolytic capacitor and can support

ceramic output capacitor with external slope

compensation.

Operating frequency is programmed by an

external resistor and is compensated for

Under voltage lockout is internally set at 2.8 V,

but can be increased by programming the

threshold with a resistor network on the enable

pin. The output voltage startup ramp is

controlled by the soft start pin. A power good

signal indicates the output is within its nominal

voltage range.

Full fault protection including OCP, SCP, OVP

UVP and OTP is provided by internal

comparators.

The MPQ8612 requires a minimum number of

readily available standard external components

and are available in QFN3X4/4X4/4X4 packages.

FEATURES

• Wide 3V to 6V Operating Input Range

• 12A/16A/20A Output Current

• Proprietary

Switching

Loss

Reduction

Technique

• Adaptive COT for Ultrafast Transient

Response

• 1% Reference Voltage Over

-20

°C

to

+85

°C Junction Temperature Range

• Programmable Soft Start Time

• Pre-Bias Start up

• Programmable Switching Frequency from

300kHz to 1MHz.

• Non-latch OCP, non-latch OVP Protection

and Thermal Shutdown

• Output Adjustable from 0.608V to 4.5V

APPLICATIONS

•

Telecom System Base Stations

•

Networking Systems

•

Server

•

Personal Video Recorders

•

Flat Panel Television and Monitors

•

Distributed Power 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

IN

FREQ

VCC

EN

PGND

BST

FB

SW

MPQ8612

ON/OFF

C1

C5

C3

L1

R4

C4

R1

R2

C2

R3

PG

AGND

SS

C6