General Description

The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z

intelligent, dual-input, stand-alone, constant-current,

constant-voltage (CCCV), thermally regulated linear

chargers are designed for a single-cell lithium-ion (Li+)

battery. They integrate the current-sense circuit, MOS

pass element, thermal-regulation circuitry, and overvolt-

age protection (OVP), and eliminate the reverse-block-

ing Schottky diode.

The MAX8804V/MAX8804W/MAX8804Z function as

stand-alone chargers to control the charging sequence

from the prequalification state through fast-charge, top-

off charge, and full-charge indication. The MAX8804Y

eliminates the prequalification state to allow startup into a

load without a battery. Proprietary thermal-regulation cir-

cuitry limits the die temperature when fast-charging or

while exposed to high ambient temperatures, allowing

maximum charging current without damaging the IC.

The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z

achieve high flexibility by providing an adjustable DC/USB

fast-charge current through a simple single-wire interface

(SET input). The chargers automatically select between

either a USB or AC adapter input source. The AC adapter

charge current is programmable from 400mA to 700mA in

50mA steps through a serial interface. The USB charge

current is programmable to 95mA, 380mA, or 475mA

through the same interface. Other features include an

active-low battery charging-status indicator (

CHG), an

active-low power-OK indicator (

POK), an active-low USB

input detection output (

USBPWR) on the MAX8804Y/

MAX8804Z, and battery pack detection (DETBAT) on the

MAX8804V/MAX8804W.

The MAX8804V has 120mA, 140mA, 180mA, and

200mA

CHG top-off threshold settings, while the

MAX8804W/MAX8804Y/MAX8804Z have 70mA, 80mA,

90mA, and 100mA.

The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z

accept a 4.15V to 30V DC source voltage or a 4.15V to

16V USB input voltage, but disable charging when

either input voltage exceeds 7.5V to protect against

unqualified or faulty input sources. The MAX8804V/

MAX8804W/MAX8804Y/MAX8804Z operate over the

extended temperature range (-40°C to +85°C) and are

available in a tiny 8-pin thermally enhanced 2mm x

3mm TDFN package.

Applications

Features

♦ Complete Chargers for Single-Cell Li+ Battery

♦ Dual-Input, 30V AC Adapter/16V USB

♦ No External FET, Blocking Diode, or Sense

Resistor Required

♦ Automatic USB/AC Adapter Input Selection

♦ Easy Programmable Fast-Charge Current and

Top-Off Threshold

♦ Proprietary Die Temperature Regulation Control

♦ ±5% Fast-Charge Current-Limit Accuracy

♦ Battery Pack Detection Input

(MAX8804V/MAX8804W)

♦ Power-Present and Charger-Status Outputs

♦ No Prequalification Charge (MAX8804Y)

♦ Tiny 2mm x 3mm Thermally Enhanced TDFN

Package

High-Voltage, Dual-Input, USB/AC

Adapter Chargers in 2mm x 3mm TDFN

________________________________________________________________

Maxim Integrated Products

1

19-0785; Rev 2; 4/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.

EVALUATION

KIT

AVAILABLE

Ordering Information

*

EP = Exposed paddle.

+

Denotes a lead-free package.

Note: All devices are specified to operate over the -40°C to

+85°C operating temperature range.

PART

PIN-

PACKAGE

TOP

MARK

MAX8804VETA+

8 TDFN-EP*

AAQ

MAX8804WETA+

8 TDFN-EP*

AAP

MAX8804YETA+

8 TDFN-EP*

AAD

MAX8804ZETA+

8 TDFN-EP*

AAC

Pin Configuration appears at end of data sheet.

DC

GND

USB

SET

CHG

POK

<USBPWR>

BAT

+3.3V

AC

ADAPTER

USB

PORT

ENABLE/DISABLE

AND PROGRAMMING

Li+

1μF

2.2μF

MAX8804V

MAX8804W

MAX8804Y

MAX8804Z

1μF

(DETBAT)

NOTE: () FOR MAX8804V/MAX8804W, < > FOR MAX8804Y/MAX8804Z

Typical Application Circuit

Cell Phones/Smartphones

Digital Cameras

Portable Media Players

MP3 Players

Other Handheld Devices