3

LTC4001

4001f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Timer Accuracy

±10

%

Enable Input Threshold Voltage

0.6

0.8

1

V

Enable Input Hysteresis

100

mV

PROG Pin Voltage

1.213

V

IDET Pin Voltage

1.213

V

IDET Threshold

150

200

250

mA

CHRG Pin Weak Pull-Down Current

15

30

50

µA

CHRG Pin Output Low Voltage

0.2

0.4

V

FAULT Pin Output Low Voltage

1mA Load

0.4

V

FAULT Pin Output High Voltage

1mA Load

4.6

V

Recharge Battery Threshold Voltage

50

100

135

mV

Recharge Filter Time Constant

4

ms

Recharge Time

Percent of Total Charge Time

50

%

Low-Battery Trickle Charge Time

25

%

Measured Using BATSENS and GNDSENS Pins

Soft-Start Ramp Current

6

12.8

16

µA

and GNDSENS Pins

NTC Pin Cold Temperature Fault

From NTC to GNDSENS Pin

Threshold

Rising Threshold

V

Falling Threshold

V

NTC Pin Hot Temperature Fault

From NTC to GNDSENS Pin

Threshold

Falling Threshold

V

Rising Threshold

V

NTC Disable Threshold (Falling)

From NTC to GNDSENS Pin

0.015 •

0.02 •

0.025 •

V

NTC Disable Hysteresis

From NTC to GNDSENS Pin

V

The

ELECTRICAL CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: Operation with current limited wall adapters is allowed down to the

undervoltage lockout threshold.

Note 3: The LTC4001E is guaranteed to meet performance specifications

from 0

°C to 85°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 5: This IC includes overtemperature protection that is intended to

protect the device during momentary overload. Junction temperature will

exceed 125

°C when overtemperature protection is active. Continuous

operation above the specified maximum operating junction temperature

my impair device reliability.