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33394 Datasheet(PDF) 4 Page - Freescale Semiconductor, Inc

Part No. 33394
Description  Switch Mode Power Supply with Multiple Linear Regulators and High Speed CAN Transcelver
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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33394 Datasheet(HTML) 4 Page - Freescale Semiconductor, Inc

 
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33394
4
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
PIN FUNCTION DESCRIPTION (44–QFN Package)
PIN NO.
NAME
DESCRIPTION
1
GND
Ground
2
SW2G
External power switch (MOSFET) gate drive — Boost Reg.
3
BOOT
Bootstrap capacitor
4
SW1
Source of the internal power switch (n–channel MOSFET)
5
SW1
Source of the internal power switch (n–channel MOSFET)
6
SW1
Source of the internal power switch (n–channel MOSFET)
7
VBAT
Battery supply to IC (external reverse battery protection needed in some applications)
8
VBAT
Battery supply to IC (external reverse battery protection needed in some applications)
9
KA_VBAT
Keep alive battery supply (with internal protection diode)
10
VIGN
Turn on control through ignition switch (with internal protection diode)
11
VKAM
VDDL tracking Keep Alive Memory (Standby) supply
12
VKAM_FB
VKAM output feedback
13
VSEN
Switched battery output
14
REGON
Regulator “Hold On” input
15
WAKEUP
CAN wake up event output
16
VREF1
VDDH tracking linear regulator 1
17
VPP_EN
VPP enable
18
VPP
5.0 V/ 3.3 V FLASH memory programming supply, tracking VDDH/VDD3_3
19
VDD3_3
3.3 V regulated supply output, base drive for optional external pass transistor
20
VDD3_3FB
VDD3_3 output feedback
21
VDDL_X
VDDL optional external pass transistor base drive, operating in Boost Mode only
22
VDDL_B
VDDL external pass transistor base drive
23
VDDL_FB
VDDL output feedback
24
/PRERESET
Open drain /PRERESET output, occurs 0.7 us prior to /HRESET (Hardware Reset)
25
/HRESET
Open drain / HRESET (Hardware Reset) output
26
/PORESET
Open drain / PORESET (Power On Reset) supervising VKAM supply to the microprocessor.
27
CANRXD
CAN receive data (DOUT)
28
CANTXD
CAN transmit data (DIN)
29
GND
Ground
30
CANL
CAN differential bus drive low line
31
CANH
CAN differential bus drive high line
32
HRT
Hardware Reset Timer pin (programmed with external capacitor and resistor)
33
/SLEEP
Sleep Mode & Power Down control
34
CS
SPI chip select
35
DI
SPI serial data in
36
SCLK
SPI clock input
37
DO
SPI serial data out
38
VREF3
VDDH tracking linear regulator 3
39
VREF2
VDDH tracking linear regulator 2
40
VDDH
5.0 V regulated supply output
41
VPRE_S
Switching pre–regulator output sense
42
VPRE
Switching pre–regulator output
43
VCOMP
Switching pre–regulator compensation (error amplifier output)
44
INV
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.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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