TPS53219A Datasheet, PDF (9/26 Pages) Texas Instruments – Wide Input Voltage, Eco-mode™, Single Synchronous Step-Down Controller

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1000
TYPICAL CHARACTERISTICS (continued)
1000
TPS53219A
SLUSAU4 – DECEMBER 2011
100
f_SET =750 kHz
10
V_IN = 12 V
V_OUT = 1.1 V
1
0.01
FCC Mode
Skip Mode
0.1
1
10
100
Output Current (A)
Figure 7. Switching Frequency vs Output Current
1200
1000
800
f_SET = 1 MHz
f_SET = 750 kHz
600
f_SET = 500 kHz
400
f_SET = 300 kHz
200
I_OUT =10 A
V_IN = 12 V
0
0
1
2
3
4
5
6
Output Voltage (V)
Figure 9. Switching Frequency vs Output Voltage
1.110
1.108
1.106
1.104
1.102
1.100
1.098
1.096
1.094
1.092 _{fSW = 500 kHz}
1.090
5678
FCC Mode, No Load
Skip Mode, No Load
All Modes, I_OUT = 20 A
9 10 11 12 13 14 15
Input Voltage (V)
Figure 11. Output Voltage vs Input Voltage
100
f_SET =1 MHz
10
V_IN = 12 V
V_OUT = 1.1 V
1
0.01
FCC Mode
Skip Mode
0.1
1
10
100
Output Current (A)
Figure 8. Switching Frequency vs Output Current
1.120
1.115
1.110
f_SET = 500 kHz
V_IN = 12 V
V_OUT = 1.1 V
1.105
1.100
1.095
1.090
1.085
1.080
0
FCC Mode
Skip Mode
5
10
15
20
25
Output Current (A)
Figure 10. Output Voltage vs Output Current
100
90
80
70
60
50
V_IN = 12 V
40
V_OUT = 1.1 V
30
20
10
0
0.01
Skip Mode, f_SW = 500 kHz
FCC Mode, f_SW = 500 kHz
Skip Mode, f_SW = 300 kHz
FCC Mode, f_SW = 300 kHz
0.1
1
10
100
Output Current (A)
Figure 12. Efficiency vs Output Current
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