34717 查看數據表（PDF） - Freescale Semiconductor

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34717

5.0 A 1.0 MHz Fully Integrated Dual Switch-Mode Power Supply

Freescale Semiconductor 

PIN CONNECTIONS

Table 1. 34717 Pin Definitions (continued)

A functional description of each pin can be found in the Functional Pin Description section beginning on page 12.

Pin Number Pin Name Pin Function Formal Name

Definition

14

15

16

17

18

19

20

21

22,23

24

25

27

VOUT2

PGND2

SW2

PVIN2

BOOT2

ILIM1

ILIM2

FREQ

VIN

GND

VDDI

GND

Output

Ground

Output

Power

Input

Input

Input

Input

Power

Ground

Output

Ground

Output Voltage

Discharge Path

Channel 2 Buck converter output voltage discharge pin

Power Ground

Channel 2 Buck converter and discharge MOSFETs power ground

Switching Node Channel 2 Buck converter switching node

Power Input Voltage Channel 2 Buck converter power input

Bootstrap Input

Channel 2 Bootstrap capacitor input pin

Soft Start Adjustment Channel 1 soft start adjustment

Input CH 1

Soft Start Adjustment Channel 2 soft start adjustment

Input CH 2

Frequency Adjustment The buck converters switching frequency adjustment input

Input

Input Supply Voltage Power supply voltage of the IC

Signal Ground

Analog ground of the IC

Internal Supply

Voltage

Internal Supply Voltage Output

Thermal Pad

Thermal pad for heat transfer. Connect the thermal pad to the analog

ground and the ground plane for heat sinking.

34717

4

Analog Integrated Circuit Device Data

Freescale Semiconductor

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