PT78ST200 Datasheet, PDF (2/3 Pages) Texas Instruments – 12V 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR

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PT78ST200 S e r i e s
CHARACTERISTIC DATA
PT78ST212 12.0 VDC (See Note 1)
Efficiency vs Output Current
100
90
Vin
80
16.0V
18.0V
70
21.0V
24.0V
28.0V
60
50
40
0
0.5
1
1.5
2
Iout-(Amps)
Ripple vs Output Current
100
80
Vin
60
28.0V
24.0V
21.0V
18.0V
40
16.0V
20
0
0
0.25 0.5 0.75
1
1.25 1.5 1.75
2
Iout-(Amps)
Thermal Derating (T_a) (See Note 2)
2
45°C
1.8
65°C
55°C
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
16
18
20
22
24
26
28
Vin-(Volts)
Power Dissipation vs Output Current
3.5
3
2.5
Vin
28.0V
2
24.0V
`
21.0V
1.5
18.0V
16.0V
1
0.5
0
0
0.5
1
1.5
2
Iout-(Amps)
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.)
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