MP2631

28V, 1A, Li-lon, Linear Battery Charger

with 10mA High Voltage LDO

MP2631 Rev.0.9

www.MonolithicPower.com

1

9/15/2008

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2008 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2631 is a linear, high performance

single cell Li-Ion or Li-Polymer battery charger

with 10mA LDO. By integrating high voltage

input protection into the charger IC, the

MP2631 can tolerate an input surge up to 28V.

The internal 5V LDO can be used as a system

watchdog supply to monitor charge status. The

LDO is ON when the input voltage is greater

than 3V and less than 7V, and remains ON

when the MP2631 is in SHDN mode. When

input is higher than 7.0V, the LDO output will be

cut off from the input. When input is lower than

5V, the LDO will work in the dropout region.

The device features constant current (CC) and

constant voltage (CV) charging modes with

programmable charge current (200mA to 1A),

auto-recharge and trickle charge.

MP2631

provides ACOK and charge status indications to

the system. The OVP circuitry will automatically

disconnect both charger and LDO from input

For guaranteed safe operation, the MP2631

limits the die temperature to a preset value

when the device is heated up due to limited

PCB space. MP2631 is available in 10-pin 3mm

x 3mm QFN package.

FEATURES

• Complete Solution for Charging Single-Cell

Li-Ion Battery

• Input Surge Protection Up to 28V

• 5V LDO output

• 3V to 7V Input Operating Range

• Programmable Charge Current: 200mA to 1A

• Termination and auto-recharge

• <1µA Battery Reverse Current

• Automatic die temperature limiting

• Fault and Charge Status Indicators

•

External Soft-Start to Control Inrush Current

• 3mm x 3mm QFN Package

APPLICATIONS

• Cell Phones

• Digital Cameras

• Smart Phones

• PDAs

• MP3 Players

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION CIRCUIT

IN

SS

ACK

CHG

SHDN

LDO

BAT

ISET

NC

GND

MP2631DQ

LED1

Green

R1

1K

LED2

Red

5-6.5V

C1

35V

C6

C5

NS

C3

NS

R2

1K

R3

1.96K

2

3

4

6

1

10

9

8

7

5

VIN

LDO

BAT

GND

GND

ACOK

CHG

SHDN

U1

1%

4

R

3.09K

1%

5

R

7.68K

1%

JP1

JP2

JP3