TPS54040A_16 Datasheet, PDF (7/53 Pages) Texas Instruments – Step-Down DC-DC Converter

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6.6 Typical Characteristics
500
V_I = 12 V
375
BOOT-PH = 3 V
250
BOOT-PH = 6 V
125
0
-50 -25
0
25
50
75
100 125 150
T_J - Junction Temperature - °C
Figure 1. ON Resistance vs Junction Temperature
1.1
V_I = 12 V
1
0.9
0.8
0.7
-50
-25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 3. Switch Current Limit vs Junction Temperature
2500
2000
V_I = 12 V,
T_J = 25°C
1500
1000
500
0
0
25
50
75 100 125 150 175 200
RT/CLK - Resistance - kW
Figure 5. Switching Frequency vs RT/CLK Resistance High
Frequency Range
TPS54040A
SLVSB58B – MARCH 2012 – REVISED JANUARY 2016
0.816
V_I = 12 V
0.808
0.800
0.792
0.784
-50 -25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 2. Voltage Reference vs Junction Temperature
610
V_I = 12 V,
RT = 200 kW
600
590
580
570
560
550
-50 -25
0
25
50
75 100 125 150
T_J - Junction Temperature - °C
Figure 4. Switching Frequency vs Junction Temperature
500
400
V_I = 12 V,
T_J = 25°C
300
200
100
0
200 300 400 500 600 700 800 900 1000 1100 1200
RT/CLK - Resistance - kW
Figure 6. Switching Frequency vs RT/CLK Resistance Low
Frequency Range
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