MAX1555EZK+T Maxim Integrated Products, MAX1555EZK+T Datasheet

MAX1555EZK+T

Manufacturer Part Number

MAX1555EZK+T

Description

IC BATT CHRGR LI+ 1-CELL SOT23-5

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1551EZKT.pdf (8 pages)

Specifications of MAX1555EZK+T

Function

Charge Management

Battery Type

Lithium-Ion (Li-Ion)

Voltage - Supply

3.7 V ~ 7 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

SOT-23-5 Thin, TSOT-23-5

Product

Charge Management

Operating Supply Voltage

3 V to 7 V

Supply Current

1.75 mA

Maximum Operating Temperature

+ 85 C

Minimum Operating Temperature

- 40 C

Charge Safety Timers

Mounting Style

SMD/SMT

Temperature Monitoring

Yes

Uvlo Start Threshold

3.75 V

Uvlo Stop Threshold

4.15 V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX1551/MAX1555 charge a single-cell lithium-ion

(Li+) battery from both USB and AC adapter sources.

They operate with no external FETs or diodes, and

accept operating input voltages up to 7V.

On-chip thermal limiting simplifies PC board layout and

allows optimum charging rate without the thermal limits

imposed by worst-case battery and input voltage. When

the MAX1551/MAX1555 thermal limits are reached, the

chargers do not shut down, but progressively reduce

charging current.

The MAX1551 includes a POK output to indicate when

input power is present. If either charging source is

active, POK goes low. The MAX1555 instead features a

CHG output to indicate charging status.

With USB connected, but without DC power, charge cur-

rent is set to 100mA (max). This allows charging from

both powered and unpowered USB hubs with no port

communication required. When DC power is connected,

charging current is set at 280mA (typ). No input-blocking

diodes are required to prevent battery drain.

The MAX1551/MAX1555 are available in 5-pin thin SOT23

packages and operate over a -40°C to +85°C range.

19-2902; Rev 0; 7/03

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.

TOP VIEW

PDAs

Wireless Appliances

Cell Phones

Digital Cameras

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+

(CHG)

USB

GND

POK

________________________________________________________________ Maxim Integrated Products

THIN SOT23

General Description

(MAX1555)

MAX1551

Pin Configuration

Applications

BAT

♦ Charge from USB or AC Adapter

♦ Automatic Switchover when AC Adapter is

♦ On-Chip Thermal Limiting Simplifies Board

♦ Charge Status Indicator

♦ 5-Pin Thin SOT23 Package

AC ADAPTER

MAX1551EZK-T

MAX1555EZK-T

MAX1551EZK

MAX1555EZK

3.7V TO 6V

3.7V TO 7V

Plugged In

Design

USB

PART

USB

Battery Chargers

(MAX1555)

MAX1551

Typical Operating Circuit

-40°C to +85°C

TEMP RANGE

Ordering Information

TOP MARK

CONTROL

ADRU

CHARGE

ADRT

CONTROL

LOGIC

GND

Selector Guide

(CHG)

BAT

POK

PIN-PACKAGE

5 Thin SOT23-5

Features

CHG Output

FEATURES

POK Output

TO LOGIC RAIL

Li+

TO SYSTEM

LOAD

Related parts for MAX1555EZK+T

MAX1555EZK+T Summary of contents

Page 1

... POK 3 (CHG) THIN SOT23 ________________________________________________________________ Maxim Integrated Products 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. ♦ Charge from USB or AC Adapter ♦ Automatic Switchover when AC Adapter is Plugged In ♦ On-Chip Thermal Limiting Simplifies Board Design ♦ ...

Page 2

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers ABSOLUTE MAXIMUM RATINGS DC to GND...................................................................... BAT .......................................................................0 to +7V BAT, CHG, POK, USB to GND .................................-0.3V to +7V Continuous Power Dissipation (T = +70°C) A 5-Pin Thin ...

Page 3

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ ELECTRICAL CHARACTERISTICS ( 1µ USB BAT BAT PARAMETER DC DC Voltage Range (Note BAT Voltage Range DC Undervoltage Lockout ...

Page 4

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers ( 1µ USB BAT BAT CHARGE CURRENT vs. DC VOLTAGE HEADROOM 300 250 200 150 100 ...

Page 5

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ PIN NAME USB Port Charger Supply Input. USB draws up to 100mA to charge the battery. Decouple USB with a 1µF 1 USB ceramic capacitor to GND. 2 GND Ground Power-OK Active-Low Open-Drain Charger ...

Page 6

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers Precharge Current The MAX1551/MAX1555 feature a precharge current to protect deeply discharged cells the device enters precharge mode where charging cur- rent is limited to 40mA. Package Thermal Limiting On-chip ...

Page 7

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) _______________________________________________________________________________________ Battery Chargers Package Information 7 ...

Page 8

... 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products ...

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