TPS55340
www.ti.com
SLVSBD4 –MAY 2012
TYPICAL CHARACTERISTICS (continued)
Vin = 5 V, TA = 25°C (unless otherwise noted)
700
3.5
3
RFREQ = 80 kΩ
600
500
400
2.5
2
COMP Pin Clamp High
COMP Pin Clamp Low
Non-Foldback
Foldback
300
200
100
0
1.5
1
0.5
−50
−50
−25
0
25
50
75
100
125
150
−25
0
25
50
75
100
125
150
Temperature (°C)
Temperature (°C)
G007
G008
Figure 7. Non-Foldback Frequency vs Foldback Frequency
Figure 8. COMP Clamp Voltage vs Temperature
2.7
1.3
1.2
1.1
1
EN Voltage Rising
EN Voltage Falling
2.66
2.62
UVLO Start
UVLO Stop
2.58
0.9
0.8
0.7
2.54
2.5
−50
−25
0
25
50
75
100
125
150
−50
−25
0
25
50
75
100
125
150
Temperature (°C)
Temperature (°C)
G009
G010
Figure 9. Input Voltage UVLO vs Temperature
Figure 10. Enable Voltage vs Temperature
100
99
98
97
96
95
94
100
95
90
85
80
75
70
RFREQ = 80 kΩ
RFREQ = 80 kΩ
−50
−25
0
25
50
75
100
125
150
−50
−25
0
25
50
75
100
125
150
Temperature (°C)
Temperature (°C)
G011
G012
Figure 11. Maximum Duty Cycle vs Temperature
Figure 12. Minimum On Time vs Temperature
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