PM6681A Просмотр технического описания (PDF) - STMicroelectronics

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PM6681A

Dual synchronous step-down controller with adjustable LDO

STMicroelectronics 

PM6681A

2

Pin settings

2.1

Connections

Figure 2. Pin connection (top view)

Pin settings

SGND

COMP2

FSEL

EN2

SHDN

FB2

LDO

OUT2

32

31

30

29

28

27

26

25

1

24

SKIP

2

23

BOOT1

3

22

HGATE1

4

21

PM6681A

PHASE1

5

20

CSENSE1

6

19

VIN

7

18

LDO5

8

17

V5SW

9

10

11

12

13

14

15

16

2.2

Functions

Table 2.

N°

Pin functions

Pin

Function

Signal ground. Reference for internal logic circuitry. It must be connected to

1

SGND

the signal ground plan of the power supply. The signal ground plan and the

power ground plan must be connected together in one point near the PGND

pin.

2

COMP2 DC voltage error compensation pin for the switching section 2

Frequency selection pin. It provides a selectable switching frequency,

3

FSEL

allowing three different values of switching frequencies for the switching

sections.

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