SLTS058B Datasheet, PDF (2/6 Pages) Texas Instruments – 1 Amp Plus to Minus Voltage Integrated Switching Regulator

PT78NR100 Series
1 Amp Plus to Minus Voltage
Integrated Switching Regulator
Typical Characteristics
PT78NR105 -5.0 VDC (See Note A)
Efficiency vs Output Current
100
90
80
Vin
7.0V
12.0V
70
15.0V
20.0V
25.0V
60
50
40
0
0.2
0.4
0.6
0.8
1
Iout-(Amps)
Ripple vs Output Current
200
160
120
80
40
0
0
0.2
0.4
0.6
0.8
Iout-(Amps)
Vin
25.0V
20.0V
15.0V
12.0V
7.0V
1
Thermal Derating (T_a) (See Note B)
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
7
60°C
70°C
85°C
10
13
16
19
22
25
Vin-(Volts)
Power Dissipation vs Output Current
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
0.2
0.4
0.6
0.8
Vin
25.0V
20.0V
15.0V
12.0V
7.0V
1
Iout-(Amps)
PT78NR109 -9.0 VDC (See Note A)
PT78NR112 -12.0 VDC (See Note A)
Efficiency vs Output Current
100
90
80
70
60
50
40
0
0.1
0.2
0.3
0.4
0.5
Iout-(Amps)
Vin
7.0V
12.0V
15.0V
18.0V
21.0V
Efficiency vs Output Current
100
90
80
70
60
50
40
0
0.1
0.2
0.3
Iout-(Amps)
VIN
7.0V
9.0V
12.0V
15.0V
18.0V
0.4
Ripple vs Output Current
200
160
120
80
40
0
0
0.1
0.2
0.3
0.4
0.5
Iout-(Amps)
Vin
21.0V
18.0V
15.0V
12.0V
7.0V
Thermal Derating (T_a) (See Note B)
0.6
0.5
0.4
0.3
0.2
0.1
0
7
70°C
85°C
11
15
19
Vin-(Volts)
Power Dissipation vs Output Current
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
0.1
0.2
0.3
0.4
0.5
Vin
21.0V
18.0V
15.0V
12.0V
7.0V
Iout-(Amps)
Ripple vs Output Current
250
200
150
100
50
0
0
0.1
0.2
0.3
Iout-(Amps)
VIN
18.0V
15.0V
12.0V
9.0V
7.0V
0.4
Thermal Derating (T_a) (See Note B)
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
7
70°C
85°C
10
13
16
19
Vin-(Volts)
Power Dissipation vs Output Current
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
VIN
18.0V
15.0V
12.0V
9.0V
7.0V
0.1
0.2
0.3
0.4
Iout-(Amps)
Note A: 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 B: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)
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