3

CHARACTERISTIC

DA T A

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

9

1317

2125

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

9

12

1518

212427

3033

3639

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

16

19

22

25

28

31

34

37

40

78ST133_ 3.3 VDC

(See Note 1)

Efficiency vs Output Current

Ripple vs Output Current

(See Note 2)

Power Dissipation vs Output Current

Iout (A)

Iout (A)

Iout (A)

Iout (A)

Iout (A)

Iout (A)

Iout (A)

Iout (A)

Iout (A)

Vin (Volts)

Vin (Volts)

Vin (Volts)

85°C

60°C

70°C

85°C

85°C

70°C

Note 1:

All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.

Note 2:

Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)

60°C

70°C

78ST100

Series

Efficiency vs Output Current

Efficiency vs Output Current

Ripple vs Output Current

Ripple vs Output Current

(See Note 2)

(See Note 2)

Power Dissipation vs Output Current

Power Dissipation vs Output Current

40

50

60

70

80

90

100

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

0

10

20

30

40

50

60

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

40

50

60

70

80

90

100

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

0

10

20

30

40

50

60

70

80

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

60°C

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.0

0.5

1.0

1.5

7.0V

10.0V

15.0V

20.0V

25.0V

30.0V

Vin

40

50

60

70

80

90

100

0.0

0.5

1.0

1.5

14.0V

20.0V

25.0V

30.0V

35.0V

Vin

0

20

40

60

80

100

120

140

0.0

0.5

1.0

1.5

14.0V

20.0V

25.0V

30.0V

35.0V

Vin

0.0

0.5

1.0

1.5

2.0

2.5

0.0

0.5

1.0

1.5

14.0V

20.0V

25.0V

30.0V

35.0V

Vin