3

LTC1731-8.2/LTC1731-8.4

sn1731 17318fs

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Automatic Shutdown Threshold Voltage

30

54

90

mV

40

69

100

mV

Voltage Mode Disable Threshold Voltage

q

0.4

V

PROG Pin Current

2.5

µA

PROG Pin Load Regulation

PROG Pin Source Current,

q

300

µA

PROG Pin Voltage

2.457

V

CHRG Pin Weak Pull-Down Current

50

100

150

µA

CHRG Pin Output Low Voltage

0.6

1.2

V

End of Charge Indication Current Level

q

25

50

100

mA

TIMER Accuracy

%

DRV Pin Clamp Voltage

6.5

V

ELECTRICAL CHARACTERISTICS

Note 2: The LTC1731E-8.2/LTC1731E-8.4 are guaranteed to meet

performance specifications from 0

°C to 70°C. Specifications over the

–40

°C to 85°C operating temperature range are assured by design,

characterization and correlation with statistical process controls. Consult

factory for I grade parts.

TYPICAL PERFOR A CE CHARACTERISTICS

9

10

11

12

1731 G01

60

55

50

45

40

Trickle Charge Current

60

55

50

45

40

TEMPERATURE (

°C)

–50

100

1731 G06

050

–25

25

75

125

9

10

11

12

1731 G08

4.96

4.95

4.94

4.93

4.92

4.91

4.90

4.89

4.88

Trickle Charge Current

vs Temperature

Trickle Charge Threshold Voltage