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Typical Characteristics

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

16

18

20

22

24

26

28

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.)

PT78ST212 12.0 VDC

(See Note 1)

Efficiency vs Output Current

Ripple vs Output Current

(See Note 2)

Power Dissipation vs Output Current

Iout-(Amps)

Iout-(Amps)

Iout-(Amps)

Vin-(Volts)

45°C

65°C

55°C

0

20

40

60

80

100

0

0.25

0.5

0.75

1

1.25

1.5

1.75

2

28.0V

24.0V

21.0V

18.0V

16.0V

Vin

0

0.5

1

1.5

2

2.5

3

3.5

0

0.5

1

1.5

2

28.0V

24.0V

21.0V

18.0V

16.0V

Vin

‘

40

50

60

70

80

90

100

00.5

11.5

2

16.0V

18.0V

21.0V

24.0V

28.0V

Vin

12V 2 Amp Positive Step-Down

Integrated Switching Regulator

PT78ST200 Series