LT1085CK datasheet(5/12 Pages) LINER

Part #	LT1085CK

Description	3A, 5A, 7.5A Low Dropout Positive Fixed Regulators

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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5

LT1083/84/85 Fixed

TYPICAL PERFORMANCE CHARACTERISTICS

LT1084 Dropout Voltage

LT1084 Short Circuit Current

LT1084 Load Regulation

OUTPUT CURRENT (A)

0

1

2

34

LT1083/4/5 FIXEDG04

5

2

6

INDICATES GUARANTEED TEST POINT

–55°C

≤ TJ ≤ 150°C

0°C

≤ TJ ≤ 125°C

TJ = 150°C

TJ = –55°C

TJ = 25°C

INPUT/OUTPUT DIFFERENTIAL (V)

0

1

3

4

5

10

7

10

20

25

LT1083/4/5 FIXED G05

2

8

9

6

5

15

30

35

25°C

–55°C

IFULL LOAD

GUARANTEED

150°C

TEMPERATURE (°C)

–50

–0.20

–0.15

–0.10

–0.05

0.05

0.10

0

050

100

150

LT1083/4/5 FIXED G06

–25

25

75

125

∆I = 5A

LT1085 Dropout Voltage

OUTPUT CURRENT (A)

0

1

2

1

2

LT1083/4/5 FIXED G07

3

4

INDICATES GUARANTEED TEST POINT

TJ = 150°C

TJ = 25°C

–55°C

≤ TJ ≤ 150°C

TJ = –55°C

0°C

≤ TJ ≤ 125°C

TEMPERATURE (°C)

–50

–0.20

–0.15

–0.10

–0.05

0.05

0.10

0

050

100

150

LT1083/4/5 FIXED G09

–25

25

75

125

∆I = 3A

LT1085 Load Regulation

INPUT/OUTPUT DIFFERENTIAL (V)

0

4

5

6

15

25

LT1083/4/5 FIXED G08

3

2

510

20

30

35

1

0

25°C

150°C

IFULL LOAD

GUARANTEED

–55°C

LT1085 Short-Circuit Current

LT1083/4/5-5 Ripple Rejection

vs Current

LT1083/4/5-5 Ripple Rejection

OUTPUT CURRENT (0 TO IFULL LOAD)

0

100

90

80

70

60

50

40

30

20

10

0

0.4

0.8

1.0

1083/4/5 FIXED G11

0.2

0.6

fR = 120Hz

VRIPPLE ≤ 3VP-P

fR = 20kHz

VRIPPLE ≤ 0.5VP-P

TEMPERATURE (°C)

–50

0

1.0

150

LT1183/4/5 FIXED G12

–1.0

–2.0

0

50

100

2.0

–25

25

75

125

Temperature Stability

30

40

50

20

10

0

60

70

80

FREQUENCY (Hz)

10

1k

10k

100k

1083/4/5 FIXED G10

100

VRIPPLE

≤ 0.5VP-P

VRIPPLE ≤ 3VP-P

(VIN – VOUT) ≥ 3V

(VIN – VOUT) ≥ VDROPOUT

IOUT = IFULL LOAD

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