LTC4080EDD-PBF View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC4080EDD-PBF

500mA Standalone Li-Ion Charger with Integrated 300mA Synchronous Buck

Linear Technology 

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

4.17

4.16

4.15

4.14

4.13

0

50 100 150 200

CHARGE CURRENT (mA)

250

4080 G01

Battery Regulation (Float) Voltage

vs Supply Voltage

4.25

4.20

4.15

Battery Regulation (Float) Voltage

vs Temperature

4.210

4.205

4.200

4.195

4.190

4.185

4.180

4.175

4.170

4.165

4.160

– 50 – 30 – 10 10 30 50 70 90

TEMPERATURE (°C)

4080 G02

Charge Current vs Temperature

with Thermal Regulation

(Constant-Current Mode)

250 VCC = 6V

VBAT = 3V

200 RPROG = 2k

4.10

150

THERMAL CONTROL

4.05

LOOP IN OPERATION

4.00

100

3.95

50

3.90

3.85

4

4.5

5

5.5

INPUT VOLTAGE (V)

6

4080 G03

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

4080 G04

Charger FET On-Resistance

vs Temperature

0.9

VCC = 4V

0.8 IBAT = 350mA

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

– 50 – 30

–10 10 30 50

TEMPERATURE (°C)

70 90

4080 G06

⎯E⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK and

MODE Pin Threshold Voltage

vs Temperature

0.95

0.90

RISING

0.85

0.80

0.75

FALLING

0.70

0.65

0.60

0.55

0.50

–50 –30 –10 10 30 50

TEMPERATURE (°C)

70 90

4080 G07

LTC4080

Charge Current

vs Battery Voltage

250

RPROG = 2k

VBAT RISING

200

150

100

50

TRICKLE CHARGE

0

0

1

2

3

4

5

BATTERY VOLTAGE (V)

4080 G02a

PROG Pin Voltage

vs Charge Current

1.0

RPROG = 2k

0.8

0.6

0.4

0.2

0

0 25 50 75 100 125 150 175 200

CHARGE CURRENT (mA)

4080 G05

⎯E⎯N⎯_⎯C⎯H⎯R⎯G Pin Pulldown

Resistance vs Temperature

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1.0

–50 –30 –10 10 30 50

TEMPERATURE (°C)

70 90

4080 G08

4080fb

5

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