MP2115

2A Synchronous Step-Down Converter

with Programmable Input Current Limit

MP2115 Rev. 1.0

www.MonolithicPower.com

1

2/28/2011

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

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2115 is a high frequency, current mode,

PWM step-down converter with integrated input

current limit switch. The step-down converter

integrates a main switch and a synchronous

rectifier for high efficiency without an external

Schottky diode. The input average current limit

can be externally programmed. It is ideal for

powering portable equipment that is powered

by an USB port. The MP2115 can supply 2A of

load current from a 2.8V to 6V input voltage.

The output voltage can be regulated as low as

0.6V.

The MP2115 is available in a space-saving

10-pin QFN package.

FEATURES

• High Efficiency: Up to 92%

• Programmable Switching Frequency from

0.7MHz-2MHz

• Programmable Input Current Limit

• 2A Available Load Current

• 2.8V to 6V Input Voltage Range

• Output Voltage as Low as 0.6V

• Current Mode Control

• Power Good Indicator

• Short Circuit Protection

• Thermal Fault Protection

• <0.1µA Shutdown Current

• Space Saving 3mm x 3mm QFN10 Package

APPLICATIONS

• USB Powered Devices

• Cellular and Smart Phones

• Microprocessors and DSP Core Supplies

• PDAs

• MP3 Players

• Digital Still and Video Cameras

• Portable Instruments

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

VIN

R4

100k

R3

100k

6TPE470MI x 3

USB Input

VIN

VSYS

AGND

FB

SW

EN

PG

MP2115DQ

U1

1

8

4

3

7

9

R6

86.6k

C5

220pF

3.8V/2A

R5

24.9k

R1

51k

R2

9.53k

VSYS

PG

EN

VOUT

Efficiency

50

60

70

80

90

100

0.0 0.1

0.2

0.3

0.4

0.5

0.6

LOAD CURRENT ( A )