MP2611

2A, 1-Cell Li-Ion Battery Switching Charger

For USB and Adapter Power

MP2611 Rev. 1.12

www.MonolithicPower.com

1

12/7/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2611 is a monolithic switching charger

with built-in power MOSFETs for a single-cell

Li-Ion battery pack. It achieves up to a 2A-

charge current that can be programmed

through an accurate sense resistor over the

whole input range. It can operate from separate

inputs for USB or AC adapter: For USB input,

the input current limit can be programmed to

500mA and 900mA through the USBM pin to

cover both USB2.0 and USB3.0 standards.

The MP2611 regulates the charge current and

battery voltage using two control loops to

realize highly accurate constant-current charge

and constant-voltage charge. A 100% duty

cycle can be achieved when battery voltage is

close to the input voltage due to the high-side

P-Channel MOSFET.

Battery charge temperature and charging status

are always monitored for each condition. Two

status-monitor output pins indicate the battery

charging status and input status. The MP2611

also

features

internal

reverse-blocking

protection.

The MP2611 is available in a 3mm x 4mm

QFN14 package.

FEATURES

• 4.5V-to-6V Operating Input Voltage

• Up to 100% Duty Operation.

• Up to 2A Programmable Charge Current

• ±0.5% Battery Voltage Accuracy

• Separate Inputs for USB and AC Adapter

• Fully-Integrated Power Switches

• Programmable Input Current Limit for the

USB Port

• No External Reverse Blocking Diode

Required

• Charging Operation Indicators

• Programmable Safety Timer

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Battery Temperature Monitor and Protection

APPLICATIONS

• Smartphones

• Portable Hand-Held Solutions

• Portable Media Players

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

C1

RS1

STAT1

STAT2

NTC

TMR

BATT

CSP

SW

MP2611

USBM

AC Adapter

Input

USB Port

ACIN

R3

USBIN

C2

VREF33

R1

R2

C3

AGND

L

1-cell

battery

EN

OFF

ON

PGND

C4

1

2

3

4

5

6

7

8

9

10

11

12

13

14

22uF

22uF

1.5k

1.5k

1uF

0.1uF

22uF

50m

2.2uH