LT1129CQ-3.3 datasheet(7/16 Pages) LINER

Part #	LT1129CQ-3.3

Description	400mV Dropout Voltage

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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7 / 16 page

LT1129/LT1129-3.3/LT1129-5

7

112935ff

TYPICAL PERFORMANCE CHARACTERISTICS

LT1129-3.3

Ground Pin Current

LT1129-5

Ground Pin Current

LT1129

Ground Pin Current

Shutdown Pin Threshold

(On-to-Off)

Shutdown Pin Threshold

(Off-to-On)

INPUT VOLTAGE (V)

0

60

50

40

30

20

10

0

8

112935 G14

2

4

6

10

13

57

9

RLOAD = 10Ω

ILOAD = 500mA*

RLOAD = 16.6Ω

ILOAD = 300mA*

RLOAD = 7.1Ω

ILOAD = 700mA*

*FOR VOUT = 5V

TJ = 25°C

VOUT = VSENSE

INPUT VOLTAGE (V)

0

60

50

40

30

20

10

0

8

112935 G15

2

4

6

10

13

57

9

RLOAD = 7.5Ω

ILOAD = 500mA*

RLOAD = 12.6Ω

ILOAD = 300mA*

RLOAD = 5.3Ω

ILOAD = 700mA*

*FOR VOUT = 3.75V

TJ = 25°C

VOUT = VADJ

OUTPUT CURRENT (A)

0

70

60

50

40

30

20

10

0

0.2

0.4

0.5

112935 G16

0.1

0.3

0.6

0.7

TJ = 25°C

TJ = 125°C

TJ = –50°C

VIN = 3.3V (LT1129-3.3)

VIN = 5V (LT1129-5)

VIN = 3.75V (LT1129)

DEVICE IS OPERATING

IN DROPOUT

TEMPERATURE (°C)

–50

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

50

75

112935 G17

–25

25

100

125

ILOAD = 1mA

TEMPERATURE (°C)

–50

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

50

75

112935 G18

–25

25

100

125

ILOAD = 1mA

ILOAD = 700mA

INPUT VOLTAGE (V)

0

60

50

40

30

20

10

0

8

112935 G13

2

4

6

10

13

57

9

RLOAD = 6.6Ω

ILOAD = 500mA*

RLOAD = 11Ω

ILOAD = 300mA*

RLOAD = 4.7Ω

ILOAD = 700mA*

*FOR VOUT = 3.3V

TJ = 25°C

VOUT = VSENSE

Shutdown Pin Current

Shutdown Pin Input Current

Adjust Pin Bias Current

TEMPERATURE (°C)

–50

400

350

300

250

200

150

100

50

0

50

75

112935 G21

–25

25

100

125

VADJ = VOUT = 3.75V

SHUTDOWN PIN VOLTAGE (V)

0

5

15

20

25

2

4

59

112935 G20

10

13

6

7

8

TEMPERATURE (°C)

–50

10

9

8

7

6

5

4

3

2

1

0

50

75

112935 G19

–25

25

100

125

VSHDN = 0V

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