General Description

The MAX1507 is an intelligent, stand-alone constant-cur-

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

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

MAX1507 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 MAX1507 functions as a stand-alone charger to

control the charging sequence from the prequalification

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

charge indication.

Proprietary thermal-regulation circuitry limits the die

temperature when fast charging or while exposed to

high ambient temperatures, allowing maximum charg-

ing current without damaging the IC.

The MAX1507 achieves high flexibility by providing an

adjustable fast-charge current and thermal regulation

setpoints. Other features include the charging status

(CHG) of the battery and an active-low control input (EN).

The MAX1507 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

MAX1507 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.

Applications

Cellular and Cordless Phones

PDAs

Digital Cameras and MP3 Players

USB Appliances

Charging Cradles and Docks

Bluetooth™ Equipment

Features

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

♦ No External FET, Reverse-Blocking Diode, or

Current-Sense Resistor Required

♦ Programmable Fast-Charge Current (0.8A max)

♦ Proprietary Programmable Die-Temperature

Regulation Control (+90°C, +100°C, and +130°C)

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

Overvoltage Protection (OVP) Above +7V

♦ Charge-Current Monitor for Fuel Gauging

♦ Low Dropout Voltage—130mV at 0.425A

♦ Input Power-Source Detection Output (VL) and

Charge-Enable Input (EN)

♦ Soft-Start Limits Inrush Current

♦ Charge Status Output (CHG) for LED or

Microprocessor Interface

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

0.8mm High

Linear Li+ Battery Charger with Integrated Pass FET

and Thermal Regulation in 3mm x 3mm Thin DFN

________________________________________________________________ Maxim Integrated Products

1

1

2

3mm x 3mm THIN DFN

TOP VIEW

3

4

MAX1507

8

76

5

Pin Configuration

Ordering Information

MAX1507

1µF

INPUT

4.25V TO 13V

2.80kΩ

IN

EN

VL

CHG

1µF

Li+

4.2V

BATT

ISET

TEMP

GND

0.47µF

OFF

ON

PART

TEMP RANGE

PIN-PACKAGE

TOP

MARK

MAX1507ETA

-40

°C to +85°C8 Thin DFN-EP*

AGW

Typical Operating Circuit

19-2899; Rev 1; 11/03

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.

EVALUATION

KIT

AVAILABLE

Bluetooth is a trademark of Ericsson.

*EP = Exposed paddle.