TPS54260
www.ti.com
SLVSA86 –MARCH 2010
Vin = 200 mV / div (ac coupled)
Vout = 20 mV / div (ac coupled)
PH = 5 V / div
PH = 5 V / div
Time = 2 usec / div
Time = 10 usec / div
Figure 54. Output Ripple, PSM
Figure 55. Input Ripple CCM
100
90
Vin = 50 mV / div (ac coupled)
80
70
60
50
40
30
20
10
0
PH = 5 V / div
VIN=12V
VOUT=3.3V
fsw=300kHz
Time = 2 usec / div
0
0.5
1.0
1.5
2.0
2.5
3.0
IO - Output Current - A
Figure 56. Input Ripple DCM
Figure 57. Efficiency vs Load Current
100
90
60
180
40
20
120
60
0
80
70
60
50
40
30
20
10
0
Phase
Gain
0
-20
-60
VIN=12V
VOUT=3.3V
fsw=300kHz
VIN=12 V
VOUT=3.3V
IOUT=2.5A
-120
-180
-40
-60
1-104
f - Frequency - Hz
1-105
1-106
10
1-103
0.001
0.01
0.1
100
IO - Output Current - A
Figure 58. Light Load Efficiency
Figure 59. Overall Loop Frequency Response
Copyright © 2010, Texas Instruments Incorporated
Submit Documentation Feedback
37
Product Folder Link(s): TPS54260
TI [ TEXAS INSTRUMENTS ]
