MCP2050 LIN Transceiver with Voltage Regulator Including OEM Hardware Requirements for LIN, Features CAN and FlexRay Interfaces in Automotive The MCP2050 is compliant with: Applications, Version 1.2, March 2011 - LIN Bus Specifications Version 1.3, and 2.x Multiple Package Options Including Small 5x5 - SAE J2602-2 QFN Support Baud Rates Up to 20 kBaud 43V Load Dump Protected Description Maximum Continuous Input Voltage of 30V The MCP2050 provides a bidirectional, half-duplex Wide LIN Compliant Supply Voltage, 6.0-18.0V communication physical interface to meet the LIN bus Extended Temperature Range: -40 to +125C specification Revision 2.1 and SAE J2602. The device Interface to PIC EUSART and Standard USARTs incorporates a voltage regulator with 5V or 3.3V 70 mA Wake-up on LIN Bus Activity or Local Wake Input regulated power supply output. The on-chip WWDT LIN Bus Pin allows users to adjust the size of the reset window by - Internal Pull-up Termination Resistor and using an external resistor. The ratiometric VBAT pin Diode for Slave Node scales down VBAT to the range of VREG so it can be - Protected Against VBAT Shorts monitored by an A/D converter. - Protected Against Loss of Ground The device has been designed to meet the stringent - High Current Drive quiescent current requirements of the automotive TXD and LIN Bus Dominant Time-out Function industry and will survive +43V load dump transients, and double battery jumps. Two Low-power Modes MCP2050 family members: - TRANSMITTER OFF Mode: 90 A (typical) - POWER DOWN Mode: 4.5 A (typical) - MCP2050-500, 14-pin, LIN driver with 5.0V regulator Output Indicating Internal RESET State (POR or SLEEP Wake) - MCP2050-330, 14-pin, LIN driver with 3.3V MCP2050 On-chip Voltage Regulator regulator - Output Voltage of 5.0V or 3.3V 70 mA - MCP2050-500, 20-pin QFN, LIN driver with Capability with Tolerances of 3% Over 5.0V regulator Temperature Range - MCP2050-330, 20-pin QFN, LIN driver with - Internal Short Circuit Current Limit 3.3V regulator - Only External Filter and Load Capacitors Needed Programmable Windowed Watchdog Timer (WWDT) - External Resistor Programmable from 7 ms to 140 ms - Disabled by Connecting the WWDTSELECT Pin to VREG or Let the Pin Float Ratiometric Output of VBAT Voltage Scaled to VREG Automatic Thermal Shutdown High Electromagnetic Immunity (EMI), Low Elec- tromagnetic Emission (EME) Robust ESD Performance: 15 kV for LBUS and VBB pin (IEC61000-4-2) Transient Protection for LBUS and VBB Pins in Automotive Environment (ISO7637) Meets Stringent Automotive Design Requirements 2012 Microchip Technology Inc. DS22299A-page 1MCP2050 MCP2050 Package Types (Top View) MCP2050 MCP2050 QFN PDIP, SOIC 1 WWDTRESET VBATRATIO 14 2 RXD 13 WWDTTRIG 15 1 WWDTTRIG 3 12 RXD CS/LWAKE WWDTSELECT VREG CS/LWAKE 2 14 WWDTSELECT 4 11 FAULT/TXE VREG 3 MCP205 13 TXD 5 FAULT/TXE 10 VBB 4 12 VBB TXD 6 RESET 9 LBUS 5 11 RESET NC NC 7 8 VSS Block Diagram 4.2V WWDTTRIG WWDTRESET Programmable VREG Windowed Watchdog WWDTselect RESET Thermal Protection Short Circuit Protection Voltage VBB Regulator Ratiometric Reference VREG Wake-Up 4.2V Internal Circuits Logic and Bus Wakeup Power Control VREG RXD ~30 CS/LWAKE k Slope Control LBUS TXD Bus Dominant FAULT/TXE VSS Timer VBB VREG Thermal and Short Circuit VBATRATIO Protection 300 DS22299A-page 2 2012 Microchip Technology Inc. NC 6 20 NC LBUS 7 19 NC VSS 8 18 V BATRATIO NC 9 17 WWDTRESET 10 NC NC 16