Datasheet

400
450
500
550
600
650
700
750
800
0 5 10 15 20
Input Voltage (V)
Switching Frequency (kHz)
V
OUT2
= 1.5 VI
OUT2
= 1 A
G017
0
100
200
300
400
500
600
700
800
900
0.01 0.1 1 10
Output Current (A)
Switching Frequency (kHz)
V
OUT1
= 3.3 V
V
IN1
, V
IN2
= 12 V
G018
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
Output Current (A)
Efficiency (%)
V
IN
= 5 V
V
IN
= 12 V
V
IN
= 18 V
G015
400
450
500
550
600
650
700
750
800
0 5 10 15 20
Input Voltage (V)
Switching Frequency (kHz)
V
OUT1
= 3.3 VI
OUT1
= 1 A
G016
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
Output Current (A)
Efficiency (%)
V
IN
= 6 V
V
IN
= 12 V
V
IN
= 18 V
G013
0
10
20
30
40
50
60
70
80
90
100
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Output Current (A)
Efficiency (%)
V
IN
= 5 V
V
IN
= 12 V
V
IN
= 18 V
G014
TPS542951
www.ti.com SLVSBI4B –JULY 2012–REVISED OCTOBER 2013
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).
Figure 13. VO1 = 3.3V, Light Load Efficiency vs Output Figure 14. VO2 = 1.5V, Efficiency vs Output Current
Current
Figure 15. VO2 = 1.5V, Light Load Efficiency vs Output Figure 16. VO1 = 3.3V, SW-frequency vs
Current
Input Voltage (PWP)
Figure 17. VO2 = 1.5V, SW-frequency vs Figure 18. VO1 = 3.3V, SW-frequency vs
Input Voltage (PWP) Output Current (PWP)
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