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

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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 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)

Charge Rate Set by

Max. Charge Current (A)

Charge Termination

Charge Regulation

Features

EV-Kit

Package

Operating Temp. Range (°C)

Price^**

MAX8677C

Li-Ion
Li-Polymer

6.6

Logic Input
Resistor

1.5

Min. Charge Current

Linear

•	Dual USB/Adapter Input

•	Internal FET/Transistor

•	Smart Power Selector

•	Stand Alone

•	Thermal Die Regulation

•	Thermistor Input

•

Timer

•

USB Input

Yes

THIN QFN/24

-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.