Typical application

STODD01

6/31

Doc ID 17789 Rev 2

4

Typical application

Note:

If the S-wire function is not used, the TX pin must be connected to GND.

Figure 3.

Application circuit

Out1

FB1

SW2

FB2

SW3

FB3

GND

R1

R2

R3

R4

L3

L2

C5

C4

C6

V

OUT2

V

OUT3

V

IN_A

V

IN_P

Reset

TX

EN

GND

SW1

L1

R5

EN

TX

Reset

V

OUT1

V

IN

C1

C3

C2

STODD01

GND

GND

Out1

FB1

SW2

FB2

SW3

FB3

GND

R1

R2

R3

R4

L3

L2

C5

C4

C6

V

OUT2

V

OUT3

V

IN_A

V

IN_P

Reset

TX

EN

GND

SW1

L1

R5

EN

TX

Reset

V

OUT1

V

IN

C1

C3

C2

STODD01

GND

GND

Table 6.

Component

Manufacturer

Part number

Value

Size

C1, C2, C3

Murata

GRM21BR61A106KE19L

10 µF

0805

C4, C5, C6

Murata

GRM32ER61C226KE20L

22 µF

1210

L1

Coilcraft

LPS6225-472MLB

4.7 µH

6 x 6 x 2.5

L2, L3

Coilcraft

LPS4018-332MLB

3.3 µH

4.1 x 4.1 x 1.8

R1

33 k

Ω (V

(2)

0603

R2

3.3 k

Ω

0603

R3

27 k

Ω (V

(3)

0603

R4

47 k

Ω

0603

R5

100 k

Ω

(4)

0603

1.

The components listed above refer to typical applications. Operation of the STODD01 is not limited to the choice of these

external components.

2.

R1 and R2 are calculated according to the following formula:

3.

R3 and R4 are calculated according to the following formula:

4.

It is recommended to use resistors with values in the range of 100k

Ω to 1MΩ.