PT6300 Datasheet, PDF (2/8 Pages) Texas Instruments – 3 AMP ADJUSTABLE POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATORS

PT6300 Series
3 Amp Adjustable Positive Step-down
Integrated Sw itching Regulators
Typical Characteristics
PT6303, 3.3 VDC (See Note A)
PT6302, 5.0 VDC (See Note A)
PT6304, 12.0 VDC (See Note A)
Efficiency vs Output Current
100
90
Vin
80
9.0V
12.0V
70
15.0V
20.0V
26.0V
60
50
40
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Efficiency vs Output Current
100
90
80
70
60
50
40
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Vin
9.0V
12.0V
15.0V
24.0V
30.0V
38.0V
Efficiency vs Output Current
100
90
Vin
80
16.0V
20.0V
70
24.0V
30.0V
38.0V
60
50
40
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Ripple vs Output Current
160
140
120
V
Vin
100
26.0V
20.0V
80
15.0V
12.0V
60
9.0V
40
20
0
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Ripple vs Output Current
180
160
140
Vin
38.0V
120
30.0V
24.0V
100
15.0V
12.0V
80
9.0V
60
40
20
0
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Ripple vs Output Current
350
300
250
Vin
38.0V
200
30.0V
24.0V
150
20.0V
16.0V
100
50
0
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Thermal Derating (Ta)
3
2.5
(See Note B)
60°C
70°C
2
85°C
1.5
1
0.5
0
9
11 13 15 17 19 21 23 25 27
Vin-(Volts)
Thermal Derating (T_a)
3
2.5
(See Note B)
50°C
60°C
2
70°C
85°C
1.5
1
0.5
0
9
13 17 21 25 29 33 37
Vin-(Volts)
Thermal Derating (T_a) (See Note B)
3
40°C
2.5
50°C
60°C
2
70°C
1.5
1
0.5
0
16
19
22
25
28
31
34
37
Vin-(Volts)
Power Dissipation vs Output Current
3.5
3
2.5
Vin
26.0V
2
20.0V
15.0V
1.5
12.0V
9.0V
1
0.5
0
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Power Dissipation vs Output Current
3.5
3
2.5
Vin
38.0V
2
30.0V
24.0V
15.0V
1.5
12.0V
9.0V
1
0.5
0
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Power Dissipation vs Output Current
4.5
4
3.5
3
Vin
38.0V
2.5
30.0V
24.0V
2
20.0V
16.0V
1.5
1
0.5
0
0
0.5
1
1.5
2
2.5
3
Iout-(Amps)
Note A: Characteristic data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR
Note B: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application note.)
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