MP2131

High Efficiency, 4 A, 5.5 V, 1.2 MHz

Synchronous Step-Down Converter

MP2131 Rev.1.0

www.MonolithicPower.com

1

5/6/2015

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© 2015 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2131 is a monolithic step-down, switch-

mode converter with built-in internal power

MOSFETs. It achieves a 4 A continuous output

current from a 2.7 V to 5.5 V input voltage with

excellent load and line regulation. The MP2131

is ideal for powering portable equipment that

run from a single cell lithium-ion (Li+) battery.

The output voltage is regulated as low as 0.6 V.

The constant-on-time (COT) control scheme

provides fast transient response, high light-load

efficiency, and eases loop stabilization.

Fault

condition

protection

includes

cycle-by-cycle

current

limit

and

thermal

shutdown.

The MP2131 requires a minimum number of

readily

available,

standard,

external

components and is available in an ultra-small

QFN-12 (2mm x 2mm) package.

The MP2131 is ideal for a wide range of

applications including portable instruments,

small handheld and battery–powered devices,

PDAs, and DVD drives.

FEATURES

• Wide 2.7 V to 5.5 V Operating Input Range

• Output Voltage as Low as 0.6 V

• 4 A Output Current

• 35 mΩ and 18 mΩ Internal Power MOSFET

• Above 96% Peak Efficiency

• Above 80% Light Load Efficiency

• Low IQ: 19 μA

• 1.2 MHz Frequency

• 100% Duty Cycle in Dropout

• 0.5 ms Internal Soft-Start Time

• EN and Power Good for Power Sequencing

• Auto Discharge at EN Off

• Short-Circuit Protection with Hiccup Mode

• Available in a QFN-12 (2mm x 2mm)

Package

APPLICATIONS

•

Storage Drives

•

Portable/Handheld Devices

•

Wireless/Networking Cards

• Low Voltage I/O System Power

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

MPS green status, please visit the MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION