LTC4065LEDC datasheet(3/16 Pages) LINEAR

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LTC4065/LTC4065A

4065fb

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IPROG

PROG Pin Pull-Up Current

VPROG > 1V

µA

(LTC4065A)

VMS,PROG

PROG Shutdown Threshold Voltage

VPROG Rising

●

3.7

4.3

(LTC4065A Only)

tSS

Soft-Start Time

180

µs

ITRKL

Trickle Charge Current

VBAT = 2V, RPROG = 2k (0.1%)

VTRKL

Trickle Charge Threshold Voltage

VBAT Rising

●

2.7

2.9

3.05

VTRHYS

Trickle Charge Hysteresis Voltage

∆VRECHRG

Recharge Battery Threshold Voltage

VFLOAT – VRECHRG, 0°C < TA < 85°C

100

130

∆VUVCL1

(VCC – VBAT) Undervoltage Current

IBAT = 90% Programmed Charge Current

180

220

330

∆VUVCL2

Limit

IBAT = 10% Programmed Charge Current

125

150

tTIMER

Termination Timer

●

4.5

Hrs

Recharge Time

●

1.5

2.25

Hrs

Low-Battery Trickle Charge Time

VBAT = 2.5V

●

0.75

1.125

1.5

Hrs

VACPR

ACPR Pin Output Low Voltage

IACPR = 5mA

●

105

(LTC4065A)

IACPR

ACPR Pin Input Current (LTC4065A)

VCC = 4V, VACPR = 4V, VBAT = 4.5V

●

µA

VCHRG

CHRG Pin Output Low Voltage

ICHRG = 5mA

●

105

ICHRG

CHRG Pin Input Current

VBAT = 4.5V, VCHRG = 5V

●

µA

IC/10

End of Charge Indication Current

RPROG = 2k (Note 5)

●

0.085

0.1

0.115

mA/mA

Level

TLIM

Junction Temperature in Constant

115

°C

Temperature Mode

RON

Power FET “ON” Resistance

IBAT = 200mA

450

Ω

(Between VCC and BAT)

fBADBAT

Defective Battery Detection CHRG

Pulse Frequency

DBADBAT

Defective Battery Detection CHRG

Pulse Frequency Duty Ratio

The

● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.

VCC = 5V, VBAT = 3.8V, VEN = 0V (LTC4065 only) unless otherwise specified. (Note 2)

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: The LTC4065/LTC4065A 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.

Note 3: Failure to solder the exposed backside of the package to the PC

board ground plane will result in a thermal resistance much higher than

rated.

Note 4: Although the LTC4065 functions properly at 3.75V, full charge

current requires an input voltage greater than the desired final battery

voltage per the

∆VUVCL1 specification.

Note 5: IC/10 is expressed as a fraction of measured full charge current

with indicated PROG resistor.

Note 6: This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. Junction

temperature will exceed 125

°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

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