ANALOG
PRODUCTS
PC33394
FACT SHEET
PC33394 MULTI OUTPUT POWER SUPPLY
The PC33394 is a multi-output power supply device with high speed CAN transceiver. The
IC incorporates a step-up/step-down switching pre-regulator, which operates over a wide
input voltage range from 3.5 V to 26.5 V with transients up to 45 V.
APPLICATIONS
鈥?Automotive Control
Module Supply
鈥?Communications and
Networking
鈥?Industrial Control
Module Supply
鈥?Set Top Boxes
鈥?xDSL Module Supply
VBAT
The following low drop out linear regulators provide several different output voltages to
supply the microcontroller core and I/O, FLASH memory, sensors and other circuits.
POWER MANAGEMENT
SPI
Control
Output
Active reset circuitry protects the data coherency of the microcontroller any time one of the
three core voltages goes out of regulation.
Simplified Application Diagram
PC33394
BOOT
SW1
KA_VBAT
VIGN
VSEN
5.0 V
VREF1
SW2_G
VPRE
VDD3_3
FLASH
Memory
3.3 V
VPP
5.0 V
5.0 V
VREF2
VDDH
5.0 V
5.0 V
VREF3
VDDL_B
2.6 V*
5.0 V / 3.3 V
VPP
VDDL_FB
Microcontroller
(MPC5xx)
KA_2.6 V*
SS
SCLK
MOSI
MISO
CS
VKAM
SPI
Control
Input
SCLK
VKAM_FB
DI
DO
CANH
CANL
GND
/PORESET
/PRERESET
/HRESET
CANTXD
CANRXD
NOTE:
* The VDDL and VKAM output voltages of the PC33394 can be adjusted
by changing the external FB resistor ratios.
SWITCHING
1
2
3
4
