LTC3454EDD データシートの表示（PDF） - Linear Technology

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LTC3454EDD

1A Synchronous Buck-Boost High Current LED Driver

Linear Technology 

LTC3454

TYPICAL PERFORMANCE CHARACTERISTICS

LED Current Programming Ratio

vs Temperature

4050 VIN = 3.6V

4000

3950

3900

3850

3800

3750

3700

3650

–55 –35 –15

PROGRAMMED ILED = 1A

PROGRAMMED ILED = 500mA

PROGRAMMED ILED = 150mA

5 25 45 65 85 105 125

TEMPERATURE (°C)

3454 G07

VLED vs VIN

60

PROGRAMMED ILED = 500mA

58 TA = 25°C

56

54

52

50

48

46

44

42

40

2.7 3.1 3.5 3.9 4.3 4.7

VIN (V)

5.1 5.5

3454 G10

Maximum Regulated VOUT

vs Programmed LED Current

5.40

VIN = 3.6V

5.35 TA = 25°C

5.30

5.25

5.20

5.15

5.10

5.05

5.00

4.95

4.90

100 200 300 400 500 600 700 800 900 1000

PROGRAMMED ILED (mA)

3454 G13

LED Current Programming Ratio

vs VIN

4050 PROGRAMMED ILED = 500mA

4000 TA = 25°C

3950

3900

3850

3800

3750

3700

3650

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

VIN (V)

3454 G08

Maximum Regulated VOUT

vs Temperature

5.40

PROGRAMMED ILED = 1A

5.35 VIN = 3.6V

5.30

5.25

5.20

5.15

5.10

5.05

5.00

4.95

4.90

–55 –35 –15 5 25 45 65 85 105 125

TEMPERATURE (°C)

3454 G11

PMOS RDS(ON) vs Temperature

300

MEASURED AT 500mA

270

240

VIN = 2.7V

210

VIN = 3.6V

180

VIN = 5.5V

150

VIN = 4.2V

120

90

–55 –35 –15 5 25 45 65 85 105 125

TEMPERATURE (°C)

3454 G14

4

VLED vs Temperature

150

VIN = 3.6V

120

PROGRAMMED

ILED = 1A

90

PROGRAMMED

60

ILED = 500mA

30

PROGRAMMED

ILED = 100mA

0

–55 –35 –15 5 25 45 65 85 105 125

TEMPERATURE (°C)

3454 G09

Maximum Regulated VOUT

vs VIN

5.40

PROGRAMMED ILED = 1A

5.35 TA = 25°C

5.30

5.25

5.20

5.15

5.10

5.05

5.00

4.95

4.90

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

VIN (V)

3454 G12

NMOS RDS(ON) vs Temperature

200

MEASURED AT 500mA

180

VIN = 2.7V

160

VIN = 3.6V

140

VIN = 5.5V

120

VIN = 4.2V

100

80

60

40

–55 –35 –15 5 25 45 65 85 105 125

TEMPERATURE (°C)

3454 G15

3454fa

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