UCC28180
SLUSBQ5A –NOVEMBER 2013–REVISED NOVEMBER 2013
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TYPICAL CHARACTERISTICS
0.99
0.97
0.95
0.93
0.91
0.89
0.87
0.85
VCC = 15 V
265
215
165
115
65
15
0
20
40
60
80
100
120
140
15 35 55 75 95 115 135 155 175 195 215 235 255
RFREQ (K)
FSW ± Switching Frequency (kHz)
C001
C002
Figure 1. Switching Frequency vs. Resistor
Figure 2. Maximum Duty Cycle vs. Switching Frequency
12.0
11.5
11.0
10.5
10.0
9.5
3.5
TJ = 25C
VSENSE = 3 V
No Gate Load
VCC Turn ON
3.0
FSW = 65 kHz
2.5
2.0
1.5
1.0
0.5
0.0
ICC Turn ON
VCC Turn OFF
ICC Turn OFF
9.0
8.5
8.0
10
60
110
±40
0
5
10
15
20
25
TJ ± Temperature (C)
VCC ± Bias Supply Voltage (V)
C003
C004
Figure 3. UVLO Threshold vs. Temperature
Figure 4. Supply Current vs. Bias Supply Voltage
8
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