MC33394 데이터 시트보기 (PDF) - Motorola => Freescale

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MC33394

Switch Mode Power Supply with Multiple Linear Regulators and High Speed CAN Transceiver

Motorola => Freescale 

33394

PIN FUNCTION DESCRIPTION (44–QFN Package)

PIN NO.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

NAME

GND

SW2G

BOOT

SW1

SW1

SW1

VBAT

VBAT

KA_VBAT

VIGN

VKAM

VKAM_FB

VSEN

REGON

WAKEUP

VREF1

VPP_EN

VPP

VDD3_3

VDD3_3FB

VDDL_X

VDDL_B

VDDL_FB

/PRERESET

/HRESET

/PORESET

CANRXD

CANTXD

GND

CANL

CANH

HRT

/SLEEP

CS

DI

SCLK

DO

VREF3

VREF2

VDDH

VPRE_S

VPRE

VCOMP

INV

DESCRIPTION

Ground

External power switch (MOSFET) gate drive — Boost Reg.

Bootstrap capacitor

Source of the internal power switch (n–channel MOSFET)

Source of the internal power switch (n–channel MOSFET)

Source of the internal power switch (n–channel MOSFET)

Battery supply to IC (external reverse battery protection needed in some applications)

Battery supply to IC (external reverse battery protection needed in some applications)

Keep alive battery supply (with internal protection diode)

Turn on control through ignition switch (with internal protection diode)

VDDL tracking Keep Alive Memory (Standby) supply

VKAM output feedback

Switched battery output

Regulator “Hold On” input

CAN wake up event output

VDDH tracking linear regulator 1

VPP enable

5.0 V/ 3.3 V FLASH memory programming supply, tracking VDDH/VDD3_3

3.3 V regulated supply output, base drive for optional external pass transistor

VDD3_3 output feedback

VDDL optional external pass transistor base drive, operating in Boost Mode only

VDDL external pass transistor base drive

VDDL output feedback

Open drain /PRERESET output, occurs 0.7 us prior to /HRESET (Hardware Reset)

Open drain / HRESET (Hardware Reset) output

Open drain / PORESET (Power On Reset) supervising VKAM supply to the microprocessor.

CAN receive data (DOUT)

CAN transmit data (DIN)

Ground

CAN differential bus drive low line

CAN differential bus drive high line

Hardware Reset Timer pin (programmed with external capacitor and resistor)

Sleep Mode & Power Down control

SPI chip select

SPI serial data in

SPI clock input

SPI serial data out

VDDH tracking linear regulator 3

VDDH tracking linear regulator 2

5.0 V regulated supply output

Switching pre–regulator output sense

Switching pre–regulator output

Switching pre–regulator compensation (error amplifier output)

Switching pre–regulator error amplifier inverting input

NOTE: The exposed pad of the 44 QFN package is electrically and thermally connected with the IC ground.

4

MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

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