Datasheet

www.ti.com
Example 3. A 3.3-V to 1.2-V DC-to-DC Converter Using a TPS40040
0 8 12
1.217
1.212
1.207
1.202
1.182
2 6 10
1.192
4
1.187
1.197
3.3 3 3.6
I
OUT
− Load Current − A
V
OUT
− Output Voltage − V
0 8 12
100
90
80
60
2 6 104
50
70
I
OUT
− Load Current − A
η − Efficiency − %
3 3.3 3.6
TPS40040 , TPS40041
SLUS700D – MARCH 2006 – REVISED DECEMBER 2007
This example illustrates a 3.3-V to 1.2-V at 10-A synchronous BUCK application using the TPS40040 switching
at 300 kHz. Separate SO-8 MOSFETs have been chosen to support the higher currents in this application and a
resistor has been added in series with the BOOT pin to slow the rising edge of the switch node and reduce EMI
on the input of the converter.
Figure 31. Schematic for 3.3-V to 1.2-V at 10-A Converter Using the TPS40040
Figure 32. Typical Efficiency for 3.3-V to 1.2-V at 10-A Figure 33. Typicaly Line and Load Regulation for 3.3-V to
Converter Using TPS40040 1.2-V at 10-A Converter Using TPS40040
Copyright © 2006 – 2007, Texas Instruments Incorporated 31
Product Folder Link(s): TPS40040 TPS40041