LTC4080X 查看數據表（PDF） - Linear Technology

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LTC4080X

500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck in 3mm × 3mm DFN

Linear Technology 

LTC4080X

TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, VCC = 5V, VBAT = 3.8V, unless otherwise

specified)

Battery Regulation (Float) Voltage

vs Charge Current

4.21

RPROG = 2k

4.20

4.19

4.18

Battery Regulation (Float) Voltage

vs Temperature

4.210

4.205

4.200

4.195

4.190

Battery Regulation (Float) Voltage

vs VCC Supply Voltage

4.25

4.20

4.15

4.10

4.17

4.16

4.15

4.14

4.13

0

50 100 150 200

CHARGE CURRENT (mA)

250

4080X G01

Charge Current vs Temperature

with Thermal Regulation

(Constant-Current Mode)

250 VCC = 6V

VBAT = 3V

200 RPROG = 2k

4.185

4.180

4.175

4.170

4.165

4.160

– 50 – 30 – 10 10 30 50

TEMPERATURE (°C)

70 90

4080X G02

PROG Pin Voltage

vs Charge Current

1.0

RPROG = 2k

0.8

4.05

4.00

3.95

3.90

3.85

4

4.5

5

5.5

VCC SUPPLY VOLTAGE (V)

6

4080X G03

Charger FET On-Resistance

vs Temperature

0.9

VCC = 4V

0.8 IBAT = 350mA

0.7

0.6

150

0.6

THERMAL CONTROL

0.5

LOOP IN OPERATION

0.4

100

0.4

0.3

50

0.2

0.2

0.1

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

4080X G04

0

0 25

⎯E⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK and

MODE Pin Threshold Voltage

vs Temperature

0.95

50 75 100 125 150 175 200

CHARGE CURRENT (mA)

4080X G05

0

– 50 – 30

–10 10 30 50

TEMPERATURE (°C)

⎯E⎯N⎯_⎯C⎯H⎯R⎯G Pin Pulldown

Resistance vs Temperature

1.7

70 90

4080X G06

0.90

RISING

1.6

0.85

1.5

0.80

0.75

FALLING

1.4

0.70

1.3

0.65

1.2

0.60

0.55

1.1

0.50

–50 –30 –10 10 30 50

TEMPERATURE (°C)

70 90

4080X G07

1.0

–50 –30 –10 10 30 50

TEMPERATURE (°C)

70 90

4080X G08

4080Xf

5

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