4

LTC3406

LTC3406-1.5/LTC3406-1.8

3406fa

TYPICAL PERFOR A CE CHARACTERISTICS

Oscillator Frequency vs

Supply Voltage

Output Voltage vs Load Current

(From Figure1a Except for the Resistive Divider Resistor Values)

SUPPLY VOLTAGE (V)

2

1.8

1.7

1.6

1.5

1.4

1.3

1.2

34

5

6

3406 G07

LOAD CURRENT (mA)

0

200 300 400 500 600 700 800

1.844

1.834

1.824

1.814

1.804

1.794

1.784

1.774

3406 G08

100

900

INPUT VOLTAGE (V)

1

0

0.4

0.5

0.7

46

3406 G09

0.3

0.2

23

57

0.1

0

0.6

MAIN

SWITCH

SYNCHRONOUS

SWITCH

Supply Current vs Supply Voltage

Supply Current vs Temperature

Switch Leakage vs Temperature

Switch Leakage vs Input Voltage

Burst Mode Operation

TEMPERATURE (°C)

–50

0.4

0.5

0.7

25

75

3406 G10

0.3

0.2

–25

0

50

100

125

0.1

0

0.6

MAIN SWITCH

SYNCHRONOUS SWITCH

SUPPLY VOLTAGE (V)

2

0

5

15

20

25

50

35

3

4

3406 G11

10

40

45

30

5

6

TEMPERATURE (°C)

–50

0

5

15

20

25

50

35

0

50

75

3406 G12

10

40

45

30

–25

25

100

125

TEMPERATURE (°C)

–50

200

250

300

25

75

3406 G13

150

100

–25

0

50

100

125

50

0

RUN = 0V

MAIN SWITCH

SYNCHRONOUS SWITCH

INPUT VOLTAGE (V)

0

0

20

40

60

80

120

1

23

4

3406 G14

56

100

RUN = 0V

SYNCHRONOUS

SWITCH

MAIN

SWITCH

SW

5V/DIV

200mA/DIV

100mV/DIV

AC COUPLED

4µs/DIV

3406 G15