Analog Integrated Circuit Device Data

Freescale Semiconductor

3

34717

PIN CONNECTIONS

PIN CONNECTIONS

Figure 3. 34717 Pin Connections

Table 1. 34717 Pin Definitions

A functional description of each pin can be found in the Functional Pin Description section beginning on page 11.

Pin Number

Pin Name

Pin Function

Formal Name

Definition

1

BOOT1

Passive

Bootstrap

Channel 1 Bootstrap capacitor input pin

2

PVIN1

Supply

Power Input Voltage

Channel 1 Buck converter power input

3

SW1

Input/Output

Switching Node

Channel 1 Buck converter switching node

4

PGND1

Ground

Power Ground

Channel 1 Buck converter and discharge MOSFETs power ground

5

VOUT1

Input

Output Voltage

Discharge Path

Channel 1 Buck converter output voltage discharge pin

6

INV1

Input

Error Amplifier

Inverting Input

Channel 1 Buck converter error amplifier inverting input

7

COMP1

Input

Buck Convertor

Compensation Input

Channel 1 Buck converter external compensation network input

8

VREFIN

Input

Reference Voltage

Input

Voltage tracking reference voltage input

9, 26

NC

None

No Connect

No internal connections to this pin. Recommend attaching a 0.1 µF

capacitor to GND.

10

PG

Output

Power Good Output

Signal

It is an active low open drain power good status reporting output

11

SD

Input

Shutdown Input

Shutdown mode input control pin

12

COMP2

Input

Buck Convertor

Compensation Input

Channel 2 Buck converter external compensation network input

13

INV2

Input

Error Amplifier

Inverting Input

Channel 2 Buck converter error amplifier inverting input

Transparent

Top View

1

2

3

4

5

6

78

9

10

11 12 13

14

15

16

17

18

19

20

21

22

23

24

25

26

BOOT1

PVIN1

SW1

PGND1

VOUT1

VOUT2

PGND2

SW2

PVIN2

BOOT2

PVIN2

SW2

PGND2

PGND1

SW1

PVIN1