TPS65232

C37

100pF

R33

20K

C36

1000pF

C32

0.1uF

C33

22uF

R31

22.1K

R32

44.2K

C31

47uF

1.2V 3A

C34

22uF

L3

2.2uH

C30

0.1uF

BG

AGND

V6V

AGND

VINBQ

BST3

C27

100pF

R23

20K

C26

1000pF

C22

0.1uF

C23

22uF

R21

22.1K

R22

17.8K

C21

47uF

1.8V 3A

C24

22uF

L2

2.2uH

C20

0.1uF

C25

1000pF

C35

1000pF

FB2

VIN

CMP2

TRIP

AGND

FB1

V3P3

SS

AGND

EN_BCK1

PH1

CMP1

BST1

C12

100uF

C11

100uF

C13

22uF

R11

22.1K

R12

4.22K

5V 6A

C14

22uF

L1

4.7uH

C15

1000pF

C18

1000pF

R14

210K

C17

100pF

R13

20K

C16

1000pF

VIN

12V

V1

FB2

FB2

VIN

FB1

FB1

V3

V1

V1

V2

EN1

EN2

EN3

Q1B

Q1A

C1

1uF

C2

1uF

C3

1uF

C10

0.22uF

C5

1uF

C4

3.3nF

AGND

FDS6982

V1

TPS65232

www.ti.com

SLVSA42 – FEBRUARY 2010

COMPONENT SELECTION PROCEDURE

The following example illustrates the design procedure for selecting external components for the three buck

converters. The example focuses on BUCK1 but the procedure can be directly applied to BUCK2 and BUCK3 as

well. The design goal parameters are given in the table below. A list of symbol definitions is found at the end of

this section. For this example the schematic in Figure 3 will be used.

Figure 3. Sample Schematic for TPS65232

Copyright © 2010, Texas Instruments Incorporated

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Not Recommended for New Designs