
CAT4139
TYPICAL CHARACTERISTICS
(V IN = 5.0 V, I OUT = 180 mA, T AMB = 25 ° C, with typical application circuit unless otherwise specified.)
200
180
160
140
120
2.0
1.5
1.0
0.5
0
? 0.5
? 1.0
? 1.5
100
3.0
3.5
4.0
4.5
5.0
5.5
? 2.0
4.5
4.7
4.9
5.1
5.3
5.5
95
INPUT VOLTAGE (V)
Figure 8. Output Current vs. Input Voltage
95
INPUT VOLTAGE (V)
Figure 9. Output Current Regulation
90
85
80
90
85
80
IOUT = 120 mA
IOUT = 180 mA
75
80
100
120
140
160
180
200
75
4.5
4.7
4.9
5.1
5.3
5.5
OUTPUT CURRENT (mA)
Figure 10. Efficiency vs. Output Current
Figure 12. Power ? up at 180 mA
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5
INPUT VOLTAGE (V)
Figure 11. Efficiency vs. Input Voltage
Figure 13. Switching Waveform