MAX1508ETA+T Maxim Integrated Products, MAX1508ETA+T Datasheet

MAX1508ETA+T

Manufacturer Part Number

MAX1508ETA+T

Description

IC BATT CHARGER LI-ION 8-TDFN

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1508ZETAT.pdf (11 pages)

Specifications of MAX1508ETA+T

Function

Charge Management

Battery Type

Lithium-Ion (Li-Ion)

Voltage - Supply

4.25 V ~ 13 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-WDFN Exposed Pad

Product

Charge Management

Operating Supply Voltage

4.25 V to 6.5 V

Supply Current

0.8 mA

Maximum Operating Temperature

+ 85 C

Minimum Operating Temperature

- 40 C

Charge Safety Timers

Mounting Style

SMD/SMT

Temperature Monitoring

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 11
Download datasheet (258Kb)

The MAX1508 is an intelligent, stand-alone constant-cur-

rent, constant-voltage (CCCV), thermally regulated linear

charger for a single-cell lithium-ion (Li+) battery. The

MAX1508 integrates the current-sense circuit, MOS pass

element, and thermal-regulation circuitry, and also elimi-

nates the reverse-blocking Schottky diode, to create the

simplest and smallest charging solution for hand-held

equipment.

The MAX1508 functions as a stand-alone charger to con-

trol the charging sequence from the prequalification state

through fast-charge, top-off charge, and full-charge indi-

cation. The MAX1508Y and MAX1508Z eliminate the pre-

qualification state to allow startup into a load without a

battery.

Proprietary thermal-regulation circuitry limits the die

temperature to +100°C when fast charging or while

exposed to high ambient temperatures, allowing maxi-

mum charging current without damaging the IC.

The MAX1508 achieves high flexibility by providing an

adjustable fast-charge current by an external resistor.

Other features include the charging status (CHG) of the

battery, an active-low control input (EN) for the

MAX1508 and MAX1508Z (active-high control input for

the MAX1508Y), and an active-low input power-source

detection output (ACOK).

The MAX1508 accepts a +4.25V to +13V supply, but dis-

ables charging when the input voltage exceeds +7V to

protect against unqualified or faulty AC adapters. The

MAX1508 operates over the extended temperature

range (-40°C to +85°C) and is available in a compact

8-pin thermally enhanced 3mm x 3mm thin DFN pack-

age with 0.8mm height.

19-2890; Rev 2; 8/05

Typical Operating Circuit appears at end of data sheet.

Bluetooth is a trademark of Ericsson.

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.

Thermal Regulation, and ACOK in 3mm x 3mm TDFN

Linear Li+ Battery Charger with Integrated Pass FET,

Cellular and Cordless Phones

PDAs

Digital Cameras and MP3 Players

USB Appliances

Charging Cradles and Docks

Bluetooth™ Equipment

________________________________________________________________ Maxim Integrated Products

General Description

Applications

♦ Stand-Alone Linear 1-Cell Li+ Battery Charger

♦ No External FET, Reverse-Blocking Diode, or

♦ Programmable Fast-Charge Current (0.8A max)

♦ Proprietary Die-Temperature Regulation Control

♦ +4.25V to +13V Input Voltage Range with Input

♦ Charge-Current Monitor for Fuel Gauging

♦ Low Dropout Voltage—130mV at 0.425A

♦ Input Power-Source Detection Output (ACOK)

♦ Soft-Start Limits Inrush Current

♦ No Prequalification State for the MAX1508Y and

♦ Charge Status Output (CHG) for LED or

♦ Small 3mm x 3mm 8-Pin Thin DFN Package,

♦ Active-Low Charge Enable (EN) (MAX1508 and

♦ Active-High Charge Enable (EN) (MAX1508Y)

*EP = Exposed paddle.

+Denotes lead-free package.

Ordering Information continued at end of data sheet.

MAX1508ETA-T

MAX1508ETA+T

Current-Sense Resistor Required

(+100°C)

Overvoltage Protection (OVP) Above +7V

MAX1508Z

Microprocessor Interface

0.8mm High

MAX1508Z)

TOP VIEW

( ) ARE FOR THE MAX1508Y ONLY

PART

-40°C to +85°C 8 Thin DFN-EP*

TEMP RANGE PIN-PACKAGE

3mm x 3mm THIN DFN

Ordering Information

MAX1508Y

MAX1508Z

MAX1508

Pin Configuration

Features

MARK

TOP

AHF

Related parts for MAX1508ETA+T

MAX1508ETA+T Summary of contents

Page 1

... Small 3mm x 3mm 8-Pin Thin DFN Package, 0.8mm High ♦ Active-Low Charge Enable (EN) (MAX1508 and MAX1508Z) ♦ Active-High Charge Enable (EN) (MAX1508Y) PART MAX1508ETA-T MAX1508ETA+T Applications *EP = Exposed paddle. +Denotes lead-free package. Ordering Information continued at end of data sheet. TOP VIEW ( ) ARE FOR THE MAX1508Y ONLY ...

Page 2

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN ABSOLUTE MAXIMUM RATINGS IN, CHG to GND .....................................................-0.3V to +14V VL, BATT, ISET, EN, EN, ACOK to GND ..................-0. ...

Page 3

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN ELECTRICAL CHARACTERISTICS (continued) = 4.0V, ACOK = EN = CHG = unconnected (for the MAX1508 and MAX1508Z (for the MAX1508Y,) ...

Page 4

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN = 4.0V, ACOK = EN = CHG = unconnected (MAX1508Y 5V BATT 1µ ...

Page 5

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN PIN NAME 1 VL Internally Generated Logic Supply for Chip. Bypass VL to GND with a 0.47µF capacitor Input Supply Voltage. ...

Page 6

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN CHG Charge Indicator Output CHG is an open-drain current source for indicating charge status. Table 1 describes the state of CHG dur- ing ...

Page 7

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN V BATT PRECHARGE 10% CHARGE CURRENT (MAX1508 ONLY) V < 2.4V BATT FAST CHARGE 100% CHARGER CURRENT I > 20% CHARGE OF ISET ...

Page 8

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN Capacitor Selection Connect a ceramic capacitor from BATT to GND for proper stability. Use a 1µF X5R ceramic capacitor for most applications. Connect ...

Page 9

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN AC/DC ADAPTER 0.47µF 2.8kΩ ARE FOR THE MAX1508Y ONLY Figure 3. µP-Interfaced Li+ Battery Charger VBUS GND USB PORT 15.4kΩ D+ ...

Page 10

Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK in 3mm x 3mm TDFN Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX1508YETA-T -40°C to +85°C 8 Thin DFN-EP* MAX1508YETA+T -40°C to +85°C 8 Thin DFN-EP* MAX1508ZETA-T -40°C ...

Page 11

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2005 Maxim Integrated Products ...

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