3

LTC4054L-4.2

4054l42f

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Junction Temperature in Constant

120

°C

Temperature Mode

Power FET “ON” Resistance

1.5

Ω

Soft-Start Time

100

µs

Recharge Comparator Filter Time

0.75

2

4.5

ms

Termination Comparator Filter Time

400

1000

2500

µs

PROG Pin Pull-Up Current

1.5

3

5

µA

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

of the device may be impaired.

Note 2: The LTC4054LE-4.2 is guaranteed to meet performance specifica-

tions 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: See Thermal Considerations.

Note 4: Supply current includes PROG pin current (

≈1mA) but does not

include any current delivered to the battery through the BAT pin.

with indicated PROG resistor.

TYPICAL PERFOR A CE CHARACTERISTICS

PROG Pin Voltage vs Supply

Voltage (Constant Current Mode)

4

0.9975

1.0000

1.0025

5.5

6.5

4054L G01

0.9950

0.9925

0.9900

4.5

5

6

1.0050

1.0075

1.0100

7

TEMPERATURE (

°C)

–50

0.9975

1.0000

1.0025

25

75

4054L G02

0.9950

0.9925

0.9900

–25

0

50

1.0050

1.0075

1.0100

100

0

0

30

60

90

120

150

180

0.25

0.5

0.75

1

4054L G03

1.25

PROG Pin Voltage vs Temperature

(Constant Current Mode)

Charge Current

vs PROG Pin Voltage