TPS54495 Datasheet, PDF (11/23 Pages) Texas Instruments – 4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET

TPS54495
www.ti.com
SLVSBH0 – JUNE 2012
TYPICAL CHARACTERISTICS (continued)
One output is enabled unless otherwise noted. V_IN = VIN1 or VIN2. V_INx = 12 V, T_A = 25°C (unless otherwise noted).
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
10
0
0.001
0.01
0.1
Output Current (A)
V_IN = 6 V
V_IN = 12 V
V_IN = 18 V
1
10
G013
Figure 13. VO1=3.3V, Light Load Efficiency vs Output
Current
20
10
0
0.00
0.25
0.50
0.75 1.00 1.25
Output Current (A)
V_IN = 5 V
V_IN = 12 V
V_IN = 18 V
1.50 1.75 2.00
G014
Figure 14. VO2=1.5V, Efficiency vs Output Current
100
90
80
70
60
50
40
30
20
10
0
0.001
0.01
0.1
Output Current (A)
V_IN = 5 V
V_IN = 12 V
V_IN = 18 V
1
10
G015
Figure 15. VO2=1.5V, Light Load Efficiency vs Output
Current
800
750
700
650
600
550
500
450
I_OUT1 = 1 A
400
0
5
10
Input Voltage (V)
V_OUT1 = 3.3 V
15
20
G016
Figure 16. VO1=3.3V, SW-frequency vs Input Voltage
800
750
700
650
600
550
500
450
I_OUT2 = 1 A
400
0
5
10
Input Voltage (V)
V_OUT2 = 1.5 V
15
20
G017
Figure 17. VO2=1.5V, SW-frequency vs Input Voltage
900
V_IN1, V_IN2 = 12 V
800
700
600
500
400
300
200
100
0
0.01
0.1
1
Output Current (A)
V_OUT1 = 3.3 V
10
G018
Figure 18. VO1=3.3V, SW-frequency vs Output Current
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