ADP1755 查看數據表（PDF） - Analog Devices

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ADP1755

1.2 A, Low VIN, Low Dropout Linear Regulator

Analog Devices 

Data Sheet

Figure 42 through Figure 45 show junction temperature calcula-

tions for different board temperatures, load currents, VIN to

VOUT differentials, and areas of PCB copper.

140

MAX JUNCTION

TEMPERATURE

120

LOAD = 1.2A

100

LOAD = 800mA

80

60

LOAD = 400mA

LOAD = 200mA

40

20

LOAD = 10mA

LOAD = 100mA

0

0.25

0.75

1.25

1.75

VIN – VOUT (V)

2.25

2.75

Figure 42. 500 mm2 of PCB Copper, TB = 25°C, LFCSP

140

MAX JUNCTION

TEMPERATURE

120

LOAD = 1.2A

LOAD = 800mA

100

LOAD = 400mA

80

LOAD = 200mA

60

LOAD = 10mA

40

LOAD = 100mA

20

0

0.25

0.75

1.25

1.75

VIN – VOUT (V)

2.25

2.75

Figure 43. 500 mm2 of PCB Copper, TB = 50°C, LFCSP

ADP1754/ADP1755

140

MAX JUNCTION

TEMPERATURE

120

100

LOAD = 1.2A

LOAD = 800mA

80

60

LOAD = 400mA

40

LOAD = 200mA

20

LOAD = 10mA

LOAD = 100mA

0

0.25

0.75

1.25

1.75

2.25

2.75

VIN – VOUT (V)

Figure 44. 1000 mm2 of PCB Copper, TB = 25°C, LFCSP

140

MAX JUNCTION

TEMPERATURE

120

LOAD = 1.2A

LOAD = 800mA

100

80

LOAD = 400mA

LOAD = 200mA

60

LOAD = 10mA

40

LOAD = 100mA

20

0

0.25

0.75

1.25

1.75

2.25

2.75

VIN – VOUT (V)

Figure 45. 1000 mm2 of PCB Copper, TB = 50°C, LFCSP

Rev. F | Page 17 of 20

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