MP2148

1A Synchronous Step-down Converter

with 11µA Iq in Ultra-small 1x1.5mm QFN

MP2148 Rev. 1.11

www.MonolithicPower.com

1

5/25/2015

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

© 2015 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2148 is a monolithic, step-down, switch-

mode converter with built-in internal power

MOSFETs. It achieves 1A continuous output

current from a 2.3V-to-5.5V input voltage with

excellent load and line regulation. The output

voltage can be regulated to as low as 0.6V.

The

Constant-On-Time

control

scheme

provides fast transient response and eases loop

stabilization. Fault protections include cycle-by-

cycle current limiting and thermal shutdown.

The MP2148 is available in an ultra-small QFN-

6 (1.0mmx1.5mm) package and requires a

minimal number of readily available standard

external components.

The MP2148 is ideal for a wide range of

applications including high performance DSPs,

wireless power, portable and mobile devices,

and other low-power systems.

FEATURES

• 2.2MHz Switching Frequency

• EN for Power Sequencing

• Power Good Only for Fixed Output Version

• Wide 2.3V-to-5.5V Operating Input Range

• Output Adjustable from 0.6V

• Up to 1A Output Current

• 120mΩ and 80mΩ Internal Power MOSFET

Switches

• Output Discharge

• 100% Duty Cycle

• Short-Circuit Protection with Hiccup Mode

• Stable with Low ESR Output Ceramic

Capacitors

• Available in a QFN-6 (1.0mmx1.5mm)

Package

APPLICATIONS

• Wireless/Networking Cards

• Portable and Mobile Devices

• Battery Powered /Wearable Devices

• 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 MPS website under Quality Assurance.

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

of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP2148

GND

FB

VIN

C1

10μF

EN

VIN

5V

VOUT

1.2V/1A

SW

C2

10μF

R1

200kΩ

R2

200kΩ

EN

OUT

L1

1μH