MAX8677CETG Maxim Integrated Products, MAX8677CETG Datasheet

MAX8677CETG

Manufacturer Part Number

MAX8677CETG

Description

QFN-24

Manufacturer

Maxim Integrated Products

Datasheets

1.MAX8677CETG.pdf (21 pages)

2.MAX8677CETG.pdf (21 pages)

3.MAX8677CETG.pdf (21 pages)

Specifications of MAX8677CETG

Date_code

10+

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The MAX8677C is an integrated 1-cell Li+ charger and

Smart Power Selector™ with dual (DC and USB) power

inputs. It can operate with either separate inputs for

USB and AC adapter power*, or from a single input that

accepts both. All power switches for charging and

switching the load between battery and external power

are included on-chip. No external MOSFETs are

required.

The MAX8677C features a Smart Power Selector to

make the best use of limited USB or adapter power.

The battery charge current and input current limit are

independently set up to 1.5A and 2A, respectively.

Input power not used by the system charges the bat-

tery. USB input current can be set to 100mA or 500mA.

Automatic input selection switches the system load

from battery to external power.

Other features include overvoltage protection (OVP),

charge status and fault outputs, power-OK monitors,

charge timer, and battery thermistor monitor.

Additionally, on-chip thermal limiting reduces the battery

charge rate to prevent overheating. The MAX8677C is

available in a 4mm x 4mm, 24-pin TQFN-EP package.

19-0781; Rev 0; 4/07

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

ADAPTER

USB

PDAs, Palmtops, and Wireless Handhelds

Smart Cell Phones

Portable Media/MP3 Players

GPS Navigation

Digital Cameras

USB

MAX8677C

Typical Operating Circuit

1.5A Dual-Input USB/AC Adapter Charger

________________________________________________________________ Maxim Integrated Products

CHARGE AND

CURRENT

General Description

CHARGE

SYS LOAD

SWITCH

LOAD

CURRENT

Applications

SYS

BAT

GND

BATTERY

SYSTEM

LOAD

and Smart Power Selector

♦ Complete Charger and Smart Power Selector

♦ No External MOSFETs Required

♦ Common or Separate USB and Adapter Inputs

♦ System Operates with Discharged or No Battery

♦ Automatic Adapter/USB/Battery Switchover

♦ Load Peaks Over Adapter Rating Are Supported

♦ Input Overvoltage Protection to 16V

♦ 40mΩ System-to-Battery Switch

♦ Thermal Regulation Prevents Overheating

♦ PREQ, CHG, DOK, UOK, and FLT Indicators

♦ 4.35V (typ) SYS Regulation Voltage

+ Denotes a lead-free package.

** EP = Exposed paddle.

* Protected by US Patent #6,507,172.

Smart Power Selector is a trademark of Maxim Integrated

Products, Inc.

MAX8677CETG+ -40°C to +85°C

by Battery

PART

CHG

DOK

UOK

SYS

FLT

TEMP RANGE

(4mm x 4mm x 0.8mm)

Ordering Information

MAX8677C

TQFN

Pin Configuration

PIN-

PACKAGE

24 TQFN-EP**

(4mm x 4mm)

Features

THM

ISET

GND

PSET

T2444-4

CODE

PKG

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