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LT1508

TYPICAL PERFORMANCE CHARACTERISTICS

Reference Voltage

vs Temperature

7.536

7.524

REFERENCE VOLTAGE (V)

7.512

7.500

7.488

7.476

7.464

7.452

7.440

7.428

鈥?5 鈥?0 鈥?5 0 25 50 75 100 125 150

JUNCTION TEMPERATURE (擄C)

1508 G04

I

M

(碌A)

Supply Current vs Supply Voltage

16

15

14

T

J

= 鈥?5擄C

SUPPLY CURRENT (mA)

13

TIME (ns)

SUPPLY CURRENT (碌A)

12

11

10

9

8

7

6

5

10

T

J

= 125擄C

T

J

= 25擄C

21

SUPPLY VOLTAGE (V)

Frequency vs R

SET

and C

SET

500

450

400

R

SET

= 10k

R

SET

= 15k

R

SET

= 20k

R

SET

= 30k

1.00

0.99

0.98

MAXIMUM DUTY CYCLE

FREQUENCY (kHz)

350

300

250

200

150

100

50

0

200

600

0.97

0.96

0.95

0.94

0.93

0.92

0.91

R

SET

= 10k

R

SET

= 15k

R

SET

= 20k

R

SET

= 30k

600

1800

1400

C

SET

CAPACITANCE (pF)

1000

2200

1508 G10

M

OUT

CURRENT (mA)

1800

1400

C

SET

CAPACITANCE (pF)

1000

U W

1508 G06

1508 G09

Multiplier Current

300

VA

OUT

= 7V

VA

OUT

= 6.5V

VA

OUT

= 6V

150

VA

OUT

= 5V

VA

OUT

= 4.5V

VA

OUT

= 4V

VA

OUT

= 3.5V

0

VA

OUT

= 3V

VA

OUT

= 2.5V

500

1508 G05

VA

OUT

= 5.5V

0

250

I

AC

(碌A)

GTDR Rise and Fall Time

400

550

500

450

Start-Up Supply Current

vs Supply Voltage

300

400

350

300

250

200

150

100

50

0

鈥?5擄C

25擄C

125擄C

FALL TIME

200

RISE TIME

100

NOTE: GTDR SLEWS

BETWEEN 1V AND 16V

32

0

0

10

20

30

40

LOAD CAPACITANCE (nF)

50

1508 G07

0

2

4

6 8 10 12 14 16 18 20

SUPPLY VOLTAGE (V)

1508 G08

GTDR1 Maximum Duty Cycle

vs R

SET

and C

SET

1.5

1.0

0.5

0

鈥?.5

鈥?.0

鈥?.5

鈥?.0

鈥?.5

鈥?.0

鈥?.5

鈥?.0

M

OUT

Pin Characteristics

T

J

= 125擄C

T

J

= 25擄C

T

J

= 鈥?5擄C

2200

0.90

200

鈥?.4

鈥?.2

1.2

0

M

OUT

VOLTAGE (V)

2.4

1508 G11

5

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