Datasheet

0.001 0.01 0.1 1 10
I -OutputCurrent- A
O
0
10
20
30
40
50
60
70
80
90
100
Efficiency-%
3.3V ,1.5V
I O
5V ,1.5V
I O
3.3V ,1.2V
I O
5V ,1.2V
I O
1
1.1
1.2
1.3
1.4
1.5
1.6
0 0.5 1 1.5 2 2.5 3
3.3Vin,1.5Vout,FCCM
3.3Vin,1.5Vout,DE
5Vin,1.5Vout,FCCM
5Vin,1.5Vout,DE
3.3Vin,1.5Vout,HEF
3.3Vin,1.2Vout,FCCM
5Vin,1.2Vout,FCCM
3.3Vin,1.2Vout,DE
5Vin,1.5Vout,HEF
5Vin,1.2Vout,DE
3.3Vin,1.2Vout,HEF
5Vin,1.2Vout,HEF
I -OutputCurrent- A
O
1.5V/1.2V
V -OutputVoltage-V
O
www.ti.com Performance Data and Typical Characteristic Curves
7.1 Efficiency
NOTE: R-C snubber to reduce switching node ringing has effect on dc-dc converter efficiency.
Figure 4. TPS53311EVM-561 Efficiency
7.2 Load Regulation
Figure 5. TPS53311EVM-561 Load Regulation
11
SLUU428A–July 2010–Revised November 2010 Using the TPS53311EVM-561, a 3-A Eco-mode™ Integrated Switcher With
Master-Slave
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