LT1764AEQ-1.5 datasheet(8/20 Pages) LINER

Part #	LT1764AEQ-1.5

Description	3A, Fast Transient Response, Low Noise, LDO Regulators

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT1764A Series

1764afb

TYPICAL PERFOR A CE CHARACTERISTICS

Ripple Rejection

LT1764A Minimum Input Voltage

Load Regulation

Output Noise Spectral Density

FREQUENCY (Hz)

20

30

50

70

80

10

1k

10k

1M

1764 G31

10

100

100k

60

40

0

COUT = 100µF

TANTALUM +

10

× 1µF

CERAMIC

COUT = 10µF

TANTALUM

IL = 1.5A

VIN = VOUT(NOM) + 1V

+ 50mVRMS RIPPLE

TEMPERATURE (

°C)

–50

–25

50

60

75

0

50

75

1764 G32

55

70

65

25

100

125

IL = 1.5A

VIN = VOUT(NOM) + 1V

+ 0.5VP-P RIPPLE

AT f = 120Hz

TEMPERATURE (

°C)

–50

2.0

2.5

3.0

25

75

1764 G33

1.5

1.0

–25

0

50

100

125

0.5

0

IL = 3A

IL = 1.5A

IL = 100mA

IL = 500mA

TEMPERATURE (

°C)

–50

25

1764 G34

–25

0

50

10

5

0

–5

–10

–15

–20

–25

–30

75

100

125

LT1764A

LT1764A-3.3

LT1764A-2.5

LT1764A-1.8

∆IL = 1mA TO 3A

VIN = 2.7V (LT1764A/LT1764A-1.5)

VIN = VOUT(NOM) + 1V

(LT1764A-1.8/-2.5/-3.3)

LT1764A-1.5

FREQUENCY (Hz)

10

0.01

0.1

1

100

1k

10k

100k

1764 G35

LT1764A-3.3

LT1764A-2.5

LT1764A-1.8

LT1764A-1.5

LT1764A

COUT = 10µF

ILOAD = 3A

Current Limit

Reverse Output Current

INPUT/OUTPUT DIFFERENTIAL (V)

0

2

4

6

1

3

5

4

8

12

16

1764 G27

20

2

0

6

10

14

18

TJ = –50°C

TJ = 125°C

TJ = 25°C

TEMPERATURE (

°C)

–50

4

5

6

25

75

1764 G28

3

2

–25

0

50

100

125

1

0

VIN = 7V

VOUT = 0V

OUTPUT VOLTAGE (V)

0

3.0

4.0

5.0

8

1764 G29

2.0

1.0

2.5

3.5

4.5

1.5

0.5

0

2

4

6

19

3

5

7

10

TJ = 25°C

VIN = 0V

CURRENT FLOWS

INTO OUTPUT PIN

VOUT = VADJ (LT1764A)

VOUT = VFB

(LT1764A-1.5/1.8/-2.5/-3.3)

LT1764A

LT1764A-1.8

LT1764A-2.5

LT1764A-3.3

LT1764A-1.5

TEMPERATURE (

°C)

–50

0

0.1

0.3

0.4

0.5

1.0

0.7

0

50

75

1764 G30

0.2

0.8

0.9

0.6

–25

25

100

125

VOUT = 1.21V (LT1764A)

VOUT = 1.5V (LT1764A-1.5)

VOUT = 1.8V (LT1764A-1.8)

VOUT = 2.5V (LT1764A-2.5)

VOUT = 3.3V (LT1764A-3.3)

VIN = 0V

LT1764A-1.5/1.8/-2.5/-3.3

LT1764A

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