MP2678

Li-Ion Battery Charger

Protection Circuit With LDO Mode

MP2678 Rev. 1.0

www.MonolithicPower.com

1

1/6/2011

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

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2678 is a high performance single cell

Li-Ion/Li-Polymer battery charger protection IC.

By integrating the high voltage input protection,

the MP2678 can tolerate an input surge up to

+30V.

The device operates like a linear regulator,

maintaining a 5V output with the input voltage

up to the over voltage protection threshold.

MP2678 features input over voltage protection

(OVP), battery over voltage protection (BOVP)

and over charge current protection (OCP).

When any fault condition happens, the IC will

immediately turn off the internal N-MOSFET to

disconnect the charging circuit from the input.

The device also provides fault indications to the

system when any of the protection events

happens.

For guaranteed safe operation, the MP2678

monitors its own internal temperature and turns

off the internal N-MOSFET bridging IN and

The MP2678 is available in an 8-pin 2mm x

2mm QFN package.

FEATURES

• Input Surge up to 30V

• Input Over Voltage Protection

• Proprietary Battery Over-Voltage Protection

• Output Short-Circuit Protection

• Soft-Stop to Prevent Voltage Spikes

• Support up to 1.7A Load Current

• Thermal Monitoring and Protection

• Enable Function

• Fault Indication

• 2 mm×2mm QFN Package

APPLICATIONS

• Cell Phones

• Smart Phones

• PDAs

• MP3 Players

• Low-Power Handheld Devices

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION CIRCUIT

VIN

MP2678

CE

GND

FLT

VB

OUT

On Off

Battery

Pack

LINEAR

BATTERY

CHARGER