BUS IC DC/DC CONVERTER MOTOR DRIVER IC RIPPLE COUNTER DRIVER IC I/O IC SENSOR IC SENSOR INTERFACE IC K-Bus transceiver LIN- / K-Bus transceiver LIN transceiver + VREG LIN transceiver ÿ LIN transceiver + VREG + WD Single wire CAN transceiver CAN transceiver ÿ LIN transceiver with voltage regulator and watchdog FEATURES E910.48 DESCRIPTION PINNING ÿ Operating voltage range (VS) 3V to 27V The IC is used as a voltage regulator with an integrated LIN-inter- ÿ Two selectable output voltages: 5V and 3.3V ±2.0% face in automotive applications. The voltage regulator supplies ÿ Output current 150mA an µC in the application. ÿ Reset impulse durations (10ms, 100ms) and threshold ÿ Pin Name Description 1 VS Battery supply + 12V 2 levels are programmable Providing an integrated watchdog with adjustable window dura- Selectable watchdog windows: tion the IC offers the best performance as a “System Basic Chip”. Fixed: 37ms or 75ms PACKAGE 3 VS1 VRES Battery supply through external resistor (e.g. RVS1=140Ý for Ivcc=100mA) Reset threshold select, weak pull up (VRES=H/L --> thresold high / threshold low) Reset duration and watchdog window select, weak pull up (DRES=H/L --> reset duration 10ms / 100ms) 4 DRES 5 TxD 6 RxD Received serial data 7 GND Ground BUS LIN-Bus Pin Reset output, active Low Transmitted serial data, pull up Variable: 3ms to 50ms When the EN pin is active (high), the voltage regulator is turned ÿ LIN-bus interface, LIN specification 2.0 on and the output voltage VCC is available. Its quality is regulated ÿ Output slew rate control to reduce EMI by sensing with the VCCS pin. The regulator is switched on by LIN- ÿ Input voltage bus ranges from – 36V to + 40V Bus wake up request or by µC directly at pin EN. 8 ÿ Wake up via bus 9 RES ÿ Standby current <30µA typical The external resistor between VS and VS1 keeps the internal pow- ÿ Over temperature and output current protection er dissipation low without compromising low supply operation. 10 RESW ÿ BUS pin protected of ESD voltage level 4kV Both 5V and 3.3V applications are possible by selecting the output 11 WD ÿ SO16 package voltage on pin MOD with a digital signal. No precision feedback 12 EN Enable input, active high, pull down 13 WU Wake up via LIN-Bus 14 MOD resistors are required. APPLICATION ÿ Bus interface for Local Interconnect Network (LIN) The reset output is active (low) at VCC low, power on, power off 15 VCCS communication including µC supervisory and with watchdog timed out. The reset threshold of VCC as well especially in automotive applications as the reset impuls duration have two programmable levels . 16 VCC BLOCK DIAGRAM VS 1 16 VS1 2 15 VRES 3 14 DRES 4 13 TxD 5 12 RxD 6 11 GND 7 10 BUS 8 9 VCC VCCS MOD5 WU EN WD RESW RES Reset additional output with threshold higher on 200mV than RES threshold Watchdog input impulses from µC, pull down Voltage regulator output voltage mode, weak pull down (MOD=H/L-->VCC=5V/3.3V) Output voltage sense input Voltage regulator output (VCC=5V 3.3V, Iload=0...100mA) VS VS VBAT VS1 MOD VDD voltage regulator VDDS PWR Option SEL 3.3V/5V 100n VDDS EN SELRES SELWD WDIN µC RESW watchdog reset & control RESET WU TxD RxD 16 LIN transceiver BUS Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications. Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited. www.elmos.de | [email protected] elmos product catalog june 2005 17