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. 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. active reset circuitry protects the data coherency of the microcontroller any time one of the three core voltages goes out of regulation. analog products pc33394 fact sheet applications ? automotive control module supply ? communications and networking ? industrial control module supply ? set top boxes ? xdsl module supply power management switching simplified application diagram vbat ka_vbat vref1 vign canh gnd sw1 vpre vkam vddh 5.0 v 2.6 v* cantxd canrxd cs sclk di do ss sclk mosi miso 5.0 v 5.0 v vsen vref2 canl vkam_fb vddl_b vddl_f b vdd3_3 sw2_g ka_2.6 v* 3.3 v microcontroller (mpc5xx) vpp boot /poreset /prereset /hreset vpp 5.0 v 5.0 v vref3 flash memory 5.0 v / 3.3 v spi control input spi control output pc33394 note: * the vddl and vkam output voltages of the pc33394 can be adjusted by changing the external fb resistor ratios.
performance typical values operating voltage 3.5v to 26.5v output voltages: v ddh 5.0 v @ 400 ma v dd3_3 3.3 v @ 120 ma *v ddl 2.6 v @ 400 ma *standby v kam 2.6 v @ 60 ma flash programming v pp 5.0 v/3.3 v @ 150 ma sensor supply v ref1 5.0v @ 100ma sensor supply v ref2 5.0v @ 100ma sensor supply v ref3 sensor supply v ref3 switched battery v sen v bat - 0.125 v @ 200 ma regulation: v ddh 0.1 v v dd3_3 2% ** v ddl 2%* ** v kam 2%* v pp v ddh 20 mv v ref1 , v ref2 , v ref3 v ddh 20 mv pwm frequency 200 khz can transceiver 500 kbits/s operating temp -40c t a 125c *does not include external resistor divider tolerance **v ddl , v kam are adjustable by means of an external resistor divider customer benefits ? low overall system cost, optimized performance/cost ratio ? provides complete system supply solution ? substantially simplified microprocessor power supply design due to proper power sequencing ? easily used in non-microprocessor applications ? high frequency switching converter improves power efficiency and eliminates need of heat sinking ? internal safety features with output voltage supervisory circuits ordering ship motorola information package method part number 44 hsop rail pc33394dh t/r PC33394DHR2 44 qfn rail pc33394fc t/r pc33394fcr2 data sheet order number pc33394/d power sequencing circuitry guarantees the core supply voltages never exceed their limits or polarities during system power up and power down. a high speed can transceiver physical layer interfaces between the microcontroller cmos outputs. the can driver is short circuit protected and tolerant of loss of battery or ground conditions. pc33394 is designed specifically to meet the needs of modules, which use advanced 32- bit microprocessor architectures like the motorola mpc5xx and mpc824x microcontroller families.
features ? wide operating voltage range 3.5 v up C 26.5 v (45 v transient) ? step-up/step-down switching pre-regulator ? multiple linear regulators with current limiting ? adjustable low voltage linear regulator with external pass transistor ? adjustable low power keep alive linear regulator ? three sensor supplies protected agains short-to-battery and short-to-ground ? /sleep and regon control pins ? reset signals, power on reset ? serial peripheral interface for control and diagnostic ? high speed can transceiver with wakeup capability ? accurate power sequencing for advanced microprocessor architectures shut auto status protection down detect limiting retry reporting input under voltage over voltage under voltage over current/sc short to battery over temperature questions ? do you have a need to reduce system costs of your design? ? are you looking for a complete, easy-to-design power supply solution for your embedded system? ? do you have to design an advanced microcontroller power supply with proper power sequencing and supervisory functions?
how to reach us: usa/europe/locations not listed: motorola literature distribution; p.o. box 5405, denver, colorado 80217 1C303C675C2140 or 1C800C441C2447 japan: motorola japan ltd.; sps, technical information center, 3C20C1, minamiCazabu. minatoCku, tokyo 106C8573 japan 81C3C3440C3569 asia/pacific: motorola semiconductors h.k. ltd.; silicon harbour centre, 2 dai king street, tai po industrial estate, tai po, n.t., hong kong 852C26668334 technical information center: 1C800C521C6274 home page: http://www.motorola.com/semiconductors/ pc33394fs/d rev. 0 motorola and the stylized m logo are registered in the u.s. patent & trademark office. all other prodcut or service names are the property of their respective owners. ? motorola, inc. 2001
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