LT1529CQ Просмотр технического описания (PDF) - Linear Technology

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LT1529CQ

3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown

Linear Technology 

LT1529

LT 1529-3.3/LT 1529-5

TYPICAL PERFOR A CE CHARACTERISTICS

LT1529-3.3

GND Pin Current

5.0

TJ = 25°C

4.5 VOUT = VSENSE

4.0 *FOR VOUT = 3.3V

3.5

RLOAD = 6.6Ω

ILOAD = 500mA*

3.0

RLOAD = 330Ω

2.5

ILOAD = 10mA*

2.0

RLOAD = 11Ω

1.5

ILOAD = 300mA*

1.0

RLOAD = 33Ω

ILOAD = 100mA*

0.5

0

0 1 2 3 4 5 6 7 8 9 10

INPUT VOLTAGE (V)

LT1529 • G10

LT1529-3.3

GND Pin Current

100

TJ = 25°C *FOR VOUT = 3.3V

90 VOUT = VSENSE

80

RLOAD = 1.1Ω

ILOAD = 3A*

70

60

50

40

RLOAD = 4.7Ω

ILOAD = 700mA*

30

RLOAD = 2.2Ω

20

ILOAD = 1.5A*

10

0

0 1 2 3 4 5 6 7 8 9 10

INPUT VOLTAGE (V)

LT1529 • G13

GND Pin Current

100

VIN = 3.75V (LT1529)

90 VIN = 3.3V (LT1529-3.3)

80

VIN = 5V (LT1529-5)

DEVICE IS OPERATING

70 IN DROPOUT

60

TJ = 25°C

50

40

TJ = 125°C

TJ = – 50°C

30

20

10

0

0 0.5 1.0 1.5 2.0 2.5 3.0

OUTPUT CURRENT (A)

LT1529 • G16

LT1529-5

GND Pin Current

5.0

TJ = 25°C

4.5 VOUT = VSENSE

4.0 *FOR VOUT = 5V

3.5

3.0 RLOAD = 500Ω

ILOAD = 10mA*

2.5

RLOAD = 10Ω

ILOAD = 500mA*

2.0

RLOAD = 16.6Ω

1.5

ILOAD = 300mA*

1.0

RLOAD = 50Ω

0.5

ILOAD = 100mA*

0

0 1 2 3 4 5 6 7 8 9 10

INPUT VOLTAGE (V)

LT1529 • G11

LT1529-5

GND Pin Current

100

TJ = 25°C

90 VOUT = VSENSE

80 *FOR VOUT = 5V

RLOAD = 1.7Ω

ILOAD = 3A*

70

60 RLOAD = 7.1Ω

ILOAD = 700mA*

50

40

30

RLOAD = 3.3Ω

20

ILOAD = 1.5A*

10

0

0 1 2 3 4 5 6 7 8 9 10

INPUT VOLTAGE (V)

LT1529 • G14

SHDN Pin Threshold

(On-to-Off)

2.0

1.8 ILOAD = 1mA

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

– 50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

LT1529 • G17

LT1529

GND Pin Current

5.0

TJ = 25°C

4.5 VOUT = VADJ

4.0

*FOR VOUT =

3.75V

3.5

3.0

2.5

2.0

RLOAD = 7.5Ω

ILOAD = 500mA*

RLOAD = 375Ω

ILOAD = 10mA*

RLOAD = 12.5Ω

ILOAD = 300mA*

1.5

1.0

RLOAD = 38Ω

ILOAD = 100mA*

0.5

0

0 1 2 3 4 5 6 7 8 9 10

INPUT VOLTAGE (V)

LT1529 • G12

LT1529

GND Pin Current

100

TJ = 25°C

90 VOUT = VADJ

80 *FOR VOUT = 3.75V

70

RLOAD = 1.25Ω

ILOAD = 3A*

60

50

40

RLOAD = 5.3Ω

ILOAD = 700mA*

30

RLOAD = 2.5Ω

20

ILOAD = 1.5A*

10

0

0 1 2 3 4 5 6 7 8 9 10

INPUT VOLTAGE (V)

LT1529 • G15

SHDN Pin Threshold

(Off-to-On)

2.0

1.8

ILOAD = 3A

1.6

1.4

1.2

ILOAD = 1mA

1.0

0.8

0.6

0.4

0.2

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

LT1529 • G18

5

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