LTC4068EDD-4.2 datasheet(4/12 Pages) LINER

Part #	LTC4068EDD-4.2

Description	Standalone Linear Li-Ion Battery Charger with Programmable Termination

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC4068-4.2/LTC4068X-4.2

406842fa

TYPICAL PERFOR A CE CHARACTERISTICS

Regulated Output (Float) Voltage

vs Charge Current

IBAT (mA)

0

4.24

300

405842 G04

4.18

4.14

100

200

400

4.12

4.10

4.26

4.22

4.20

4.16

500

600

700

VCC = 5V

TA = 25°C

RPROG = 1.25k

Regulated Output (Float) Voltage

vs Temperature

TEMPERATURE (°C)

–50

4.185

4.190

4.195

4.200

4.205

4.215

–25

025

50

405842 G05

75

100

4.210

VCC = 5V

RPROG = 10k

Regulated Output (Float) Voltage

vs Supply Voltage

VCC (V)

4

4.185

4.190

4.195

4.200

4.205

4.215

4.5

5

5.5

6

405842 G06

6.5

7

4.210

TA = 25°C

RPROG = 10k

CHRG Pin I-V Curve

(Pull-Down State)

Trickle Charge Current

vs Temperature

ACPR Pin I-V Curve

(Pull-Down State)

VCHRG (V)

0

20

25

30

35

405842 G07

15

10

12

46

7

5

0

TA = –40°C

TA = 25°C

TA = 90°C

VCC = 5V

VBAT = 4V

VACPR (V)

0

20

25

30

35

405842 G08

15

10

12

46

7

5

0

TA = –40°C

TA = 25°C

TA = 90°C

VCC = 5V

VBAT = 4V

TEMPERATURE (°C)

–50

0

10

20

30

40

60

–25

025

50

405842 G09

75

100

50

VCC = 5V

VBAT = 2.5V

RPROG = 2k

LTC4068 ONLY

RPROG = 10k

Trickle Charge Current

vs Supply Voltage

Charge Current vs Battery Voltage

VCC (V)

4

0

10

20

30

40

60

4.5

5

5.5

6

405842 G10

6.5

7

50

VBAT = 2.5V

TA = 25°C

RPROG = 2k

RPROG = 10k

LTC4068 ONLY

Trickle Charge Threshold Voltage

vs Temperature

TEMPERATURE (°C)

–50

2.875

2.900

2.925

25

75

405842 G11

2.850

2.825

2.800

–25

0

50

2.950

2.975

3.000

100

VCC = 5V

RPROG = 10k

LTC4068 ONLY

VBAT (V)

2.4

400

500

600

3.3

3.9

405842 G12

300

200

2.7

3

3.6

4.2

4.5

100

0

VCC = 5V

θJA = 40°C/W

RPROG = 2k

LTC4068 ONLY

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