MAXIM MAX8600, MAX8601 Technical data

General Description

The MAX8600/MAX8601 single-/dual-input linear bat­tery chargers safely charge single-cell Li+ batteries.
The charging rate is optimized to accommodate the
thermal characteristics of a given application. There is
no need to reduce the maximum charge current or
worst-case charger power dissipation. Charging is opti­mized for Li+ cells using a control algorithm that
includes low-battery precharging, voltage and current­limited fast-charging, and top-off charging, while con­tinuously monitoring the battery for overvoltage,
over/undertemperature, and charging time. The charg­er timeout protection is programmable. The charger
status is indicated by three open-drain outputs.

The MAX8601 automatically selects between either a
USB or AC adapter input source. The AC adapter
charge current is programmable, while USB charge
current is set not to exceed either 100mA or 500mA,
depending on the USEL input. The MAX8600 is a sin­gle-input charger with no USB source input.

The MAX8600/MAX8601 are available in the tiny 3mm x
3mm power-enhanced TDFN package.

Applications

Cell Phones Portable Media Players

Digital Cameras MP3 Players

PDAs Wireless Appliances

Features

♦ Single- (MAX8600) or Dual- (MAX8601) Input Li+

Charger

♦ Up to 1A Programmable Fast-Charge

♦ 100mA/500mA USB Select Input (MAX8601)

♦ ±5% Fast-Charge Current-Limit Accuracy

♦ 14V Input Overvoltage Protection

♦ Programmable On-Chip Charge Timers

♦ Battery Thermistor Input

♦ Charger-Status Outputs

♦ Thermally Optimized Charge Rate

♦ 14-Pin 3mm x 3mm TDFN Package

MAX8600/MAX8601

Single-/Dual-Input 1-Cell Li+ Chargers with

OVP Protection and Programmable Charge Timer

________________________________________________________________ Maxim Integrated Products 1

19-3565; Rev 2; 7/08

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

PART

TEMP

PIN-PACKAGE

TOP

PKG

CODE

MAX8600ETD

-40°C to

T1433-2

MAX8601ETD

-40°C to

T1433-2

Pin Configurations continued at end of data sheet.

BAT

Li+

CT

THM

AC

ADAPTER

USB

PORT

GND

USB

EN

OFF

ON

FLT

+5V

CHARGE
STATUS

DC

SETI

USEL

POK

CHG

MAX8601

500mA

100mA

Typical Operating Circuit

8

9

10

11

12

13

14

7

6

5

4

3

2

1

MAX8600

TDFN

TOP VIEW

SETI

BAT

THM

GND

CT

N.C.

N.C.

FLT

DC

DC

CHG

POK

N.C.

EN

Pin Configurations

*EP = Exposed pad.

RANGE

+85°C

+85°C

14 TDFN-EP* 3mm
x 3mm (T1433-2)

14 TDFN-EP* 3mm
x 3mm (T1433-2)

MARK

ABB

AAC

MAX8600/MAX8601

Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

DC, USB to GND ....................................................-0.3V to +16V

BAT, CT,

CHG, EN, FLT, SETI,

POK, THM, USEL to GND..................................-0.3V to +6.0V

Continuous Power Dissipation (T

A

= +70°C)
14-Pin TDFN 3mm x 3mm (derate 18.2mW/°C

above +70°C)............................................................ 1454mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

ELECTRICAL CHARACTERISTICS

(VDC= V

USB

= 5V, V

BAT

= 4V, VEN= 0V, R

SETI

= 2kΩ, CCT= 0.068µF, TA= -40°C to +85°C, unless otherwise noted. Typical values

are at T

A

= +25°C. Note 1)

PARAMETER CONDITIONS

DC OR USB (Note 2)

Input Voltage Range 014V

Input Operating Range (Note 3)

V

Input Undervoltage Threshold

Input rising, 500mV hysteresis (typ)

4.0

V

Input Overvoltage Threshold Input rising, 200mV hysteresis (typ) 7.2 7.5 7.8 V

Input Overvoltage Delay From overvoltage event to charger disabled

s

Input Supply Current I

BAT

= 0mA, R

THM

= 10kΩ

µA

Shutdown Input Current VEN = 5V, TA = +25°C

µA

Input to BAT On-Resistance Input = 3.7V, V

BAT

= 3.6V 0.5 0.8 Ω

Input to BAT Dropout Voltage

Input falling, 200mV hysteresis (typ) 5 55

mV

BAT

TA = +25°C

4.2

BAT Regulation Voltage I

BAT

= 0mA

T

A

= -40°C to +85°C

4.2

V

BAT Restart Fast-Charge
Threshold

From BAT regulation voltage

mV

R

SETI

= 1.5kΩ

R

SETI

= 2kΩ

R

SETI

= 5kΩ

DC Charging Current V

USB

= 0V

Prequal, R

SETI

= 2kΩ, V

BAT

= 2.5V 60 75 90

mA

V

USEL

= 5V

V

USEL

= 0V 80 95

USB Charging Current VDC = 0V

Prequal, R

SETI

= 2kΩ, V

BAT

= 2.5V 60 75 90

mA

Soft-Start Time Ramp time to fast-charge current 1.2 ms

BAT Prequal Threshold V

BAT

rising, 180mV hysteresis (typ) 2.9 3 3.1 V

BAT Leakage Current VDC = V

USB

= 0V, V

BAT

= 4.2V

5µA

SETI

R

SETI

Resistance Range (Note 4) 1.5 5.0 kΩ

MIN TYP MAX UNITS

4.15 7.00

3.85

0.25

750 1200

275 435

4.179

4.166

-180 -150 -120

950 1000 1050

727 750 773

280 300 320

450 475 500

0.001

4.15

120

4.221

4.234

100

MAX8600/MAX8601

Single-/Dual-Input 1-Cell Li+ Chargers with

OVP Protection and Programmable Charge Timer

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDC= V

USB

= 5V, V

BAT

= 4V, VEN= 0V, R

SETI

= 2kΩ, CCT= 0.068µF, TA= -40°C to +85°C, unless otherwise noted. Typical values

are at T

A

= +25°C. Note 1)

PARAMETER CONDITIONS

MIN

TYP

MAX

UNITS

EN, USEL

Rising 1.6

Logic Input Thresholds

Falling 0.4

V

TA = +25°C

1

Logic Input Leakage Current

V EN = V

USEL

= 0 to 5.5V

T

A

= +85°C

µA

POK, CHG, FLT

Logic Output Voltage, Low I

POK,

= I

CHG

= I

FLT

= 1mA 12

mV

TA = +25°C

1

Logic Output Leakage
Current, High

V

POK

= V

CHG

= V

FLT

= 5.5V,

V

DC

= V

USB

= 0V

T

A

= +85°C

µA

CHG

R

SETI

= 1.5kΩ 75

R

SETI

= 2kΩ

CHG/Top-Off Threshold

I

BAT

falling, battery is

charged

R

SETI

= 5kΩ

mA

THM

THM Pullup Resistance 10 kΩ

THM Resistance, Hot R

THM

falling, 420Ω hysteresis (typ)

kΩ

THM Resistance, Cold R

THM

rising, 2.7kΩ hysteresis (typ)

kΩ

THM Resistance, Disabled R

THM

falling, 230Ω hysteresis (typ)

Ω

CT

Timer Accuracy CCT = 0.068µF -20

%

Prequal Time Limit From entering prequal to FLT low, V

BAT

< 3V

min

Charge Time Limit From entering fast-charge to FLT low, 3V < V

BAT

< 4.2V

min

Top-Off Time Limit From CHG high to charger disabled

min

THERMAL LOOP

Thermal-Limit Temperature

Juncti on tem p er atur e w hen the char g e cur r ent i s r ed uced ,
T

J

r i si ng

°C

Thermal-Limit Gain

mA/°C

Note 1: Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by design

and characterization.

Note 2: Input refers to either DC or USB.
Note 3: Guaranteed by undervoltage- and overvoltage-threshold testing. For complete charging, the input voltage must be greater

than 4.32V. See the Applications Information section.

Note 4: Guaranteed by the current-limit test.

Reduction of I

for increase of TJ, from VDC, R

BAT

= 1.5kΩ -50

SETI

0.001

0.01

0.001

0.01

37.5 56.25 75.0

22.5

3.72 3.94 4.13

26.7 28.3 29.7

274 309 337

34.8

334

34.8

+100

100

+20

MAX8600/MAX8601

Single-/Dual-Input 1-Cell Li+ Chargers with
OVP Protection and Programmable Charge Timer

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VDC= 5V, R

SETI

= 2kΩ, V

BAT

= 3.6V, MAX8601 evaluation kit with thermal resistance of 50°C/W. TA= +25°C, unless otherwise noted.)

0

300

200

100

500

400

900

800

700

600

1000

0 2 4 6 8 10 12 14

SUPPLY CURRENT vs. INPUT VOLTAGE

MAX8600/01 toc01

INPUT VOLTAGE (V)

SUPPLY CURRENT (μA)

VEN = 0V

0

300

200

100

500

400

900

800

700

600

1000

02468101214

DISABLED SUPPLY CURRENT

vs. INPUT VOLTAGE

MAX8600/01 toc02

INPUT VOLTAGE (V)

SUPPLY CURRENT (μA)

VEN = 5V

0

200

400

600

800

1000

01.00.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5

CHARGE CURRENT

vs. BATTERY VOLTAGE

MAX8600/01 toc03

V

BAT

(V)

CHARGE CURRENT (mA)

DASHED DATA TAKEN
WITH PULSE TESTING TO
AVOID THERMAL LIMIT

R

SETI

= 1.5kΩ

R

SETI

= 2kΩ

R

SETI

= 3kΩ

0

200

400

600

800

1000

02468101214

CHARGE CURRENT

vs. DC VOLTAGE

MAX8600/01 toc04

VDC (V)

CHARGE CURRENT (mA)

R

SETI

= 1.5kΩ

R

SETI

= 2kΩ

R

SETI

= 3kΩ

DASHED DATA
TAKEN WITH PULSE
TESTING TO AVOID
THERMAL LIMIT

0

200

100

400

300

700

600

500

800

04268101214

CHARGE CURRENT vs. USB VOLTAGE

MAX8600/01 toc05

V

USB

(V)

CHARGE CURRENT (mA)

V

USEL

= 0V

V

USEL

= 5V

DASHED DATA TAKEN WITH
PULSE TESTING TO AVOID THERMAL LIMIT

0

200

100

400

300

600

500

700

900

800

1000

0 0.2 0.3 0.40.1 0.5 0.6 0.7 0.90.8 1.0

CHARGE CURRENT vs. INPUT

VOLTAGE HEADROOM

MAX8600/01 toc06

(VIN - V

BAT

) (V)

CHARGE CURRENT (mA)

4.180

4.190

4.185

4.200

4.195

4.205

4.210

-40 10-15 35 60 85

BATTERY REGULATION

VOLTAGE vs. AMBIENT TEMPERATURE

MAX8600/01 toc07

TA (°C)

BATTERY REGULATION VOLTAGE (V)

0

300

200

100

400

500

600

700

800

900

1000

-40 10-15 35 60 85

CHARGE CURRENT vs. AMBIENT

TEMPERATURE (750mA CHARGE)

MAX8600/01 toc08

TA (°C)

CHARGE CURRENT (mA)

V

BAT

= 4V

V

BAT

= 3.6V