MAX8677C 1.5A Dual-Input USB/AC Adapter Charger and Smart Power Selector

Description

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 battery. 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.

Key Features

Applications/Uses

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 by Battery
Input Overvoltage Protection to 16V
40mΩ System-to-Battery Switch
Thermal Regulation Prevents Overheating
Active-Low PREQ, Active-Low CHG, Active-Low DOK, Active-Low UOK, and Active-Low FLT Indicators
4.35V (typ) SYS Regulation Voltage

	Digital Cameras
	GPS Navigation
	PDAs, Palmtops, and Wireless Handhelds
	Portable Media/MP3 Players
	Smart Cell Phones

Key Specifications: Battery Chargers

Part Number

Cell Chemistry

Number of Lithium-Ion cells

Protected V_IN (max) (V)

Charging V_IN (max) (V)

Internal FET/Transistor

Charger (V)

Charge Rate Set by

Max. Charge Current (A)

Charge Termination

Secondary Charge Termination

Charge Regulation

Features

EV-Kit

Package

Smallest Available Package (max w/pins) (mm²)

RoHS Available

Operating Temp. Range (°C)

Price^**

MAX8677C

Li-Ion
Li-Polymer

6.6

Yes

4.2

Logic Input
Resistor

1.5

Min. Charge Current

Timer

Linear

•	Dual USB/Adapter Input

•	Smart Power Selector

•	Stand Alone

•	Thermal Die Regulation

•	Thermistor Input

•

Timer

•

USB Input

Yes

THIN QFN/24

Yes

-40 to +85

$1.95 @ 1k

See All Battery Chargers (60)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-2 of 2

MAX8677C

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX8677CETG+T

THIN QFN;24 pin;17 mm²
Dwg: 21-0139H (PDF)
Use pkgcode/variation: T2444+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX8677CETG+

THIN QFN;24 pin;17 mm²
Dwg: 21-0139H (PDF)
Use pkgcode/variation: T2444+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

Related Products

MAX8677A 1.5A Dual-Input, USB/AC Adapter Charger and Smart Power Selector