R5111x Series AEC-Q100 Compliant 36V System Power Supply with Watchdog Timer for Automotive Applications No. EC-361-191212 OUTLINE R5111x is the system power supply and supervisor IC based on the high-voltage CMOS process technology, and has high accuracy and ultra low supply current voltage. R5111x consists of a voltage regulator (VR), a voltage detector (VD), and a normal / window type of watchdog timer (WDT) in a chip, and can provide three functions of the system power supply, the supply voltage supervisor, and the supervision of systems misoperation. Voltage Regulator allows the output current of 300 mA. And, VR has the inrush current protection circuit for rising pulse (Typ.250 mA or less). Voltage Detector outputs a reset signal when a reduction of supply voltage (SENSE / V ) is detected, and the reset signal is used as system reset. The detection voltage is internally OUT fixed in an IC. And, the delay time is adjustable with an external capacitor because VD has the built-in release delay circuit (the power-on reset circuit). When the supply voltage is higher than the release output voltage, VD maintains the reset state during the delay time. The output type of RESETB and D are Nch open-drain. OUT In addition, R5111xxx2C and R5111xxx2D (Detector with SENSE pin) have a manual reset (MR) pin. Watchdog Timer detects the microprocessor output pulse. In addition to the normal type of WDT (R5111Sxx1A / R5111xxx2C) that outputs a reset signal when the detected pulse period is longer than normal, R5111x supports the window type of WDT (R5111Sxx1B / R5111xxx2D) that outputs a reset signal when the detected pulse period is shorter or longer. RESETB outputs the reset signal when using R5111Sxx1A / R5111Sxx1B, and the WDO pin outputs L as the reset signal when using R5111xxx2C / R5111xxx2D. The output type of WDO is Nch open-drain. In addition, R5111xxx2C and R5111xxx2D have an inhibiting (INH) pin to stop the watchdog timers monitoring function. The time out period of Watchdog Timer is also adjustable with an external capacitor. R5111x supports the packages of HSOP-8E, HSOP-18 and HQFN0808-28. FEATURES Operating Voltage Range (Maximum Rating) 3.5 V to 36.0 V (50.0 V) Operating Temperature Range 40C to 125C Supply Current Typ. 25 A Supply Current (On standby) Typ. 0.2 A <Voltage Regulator (VR)> Output Voltage Range 1.8 V to 5.0 V Dropout Voltage Typ. 0.3 V (VOUT = 5.0 V, 300 mA) Output Voltage Accuracy 1.5% (40C Ta 125C) Output Voltage Temperature Coefficient Typ. 100 ppm/C Built-in Short Current Limit Circuit Typ. 110 mA 1 R5111x No. EC-361-191212 Built-in Overcurrent Protection Circuit Min. 300 mA Built-in Thermal Shutdown Circuit Typ.165C Recommended Ceramic Capacitor 0.1 F or more <Voltage Detector (VD)> Detector Threshold Range 1.6 V to 5.5 V Detector Threshold Accuracy 1.8% (40C Ta 125C) Release Delay Accuracy 20% (40C Ta 125C) Release Delay Time Typ. 242 ms (CD = 0.22 F) Delay Time is adjustable with an external capacitor. <Watchdog Timer (WDT)> Open Window Accuracy 20% (40C Ta 125C) Open Window Time Typ.18 ms (CTW = 10 nF) Closed Window Time Typ.18 ms (CTW = 10 nF) Long Open Window Time Typ.72 ms (C = 10 nF) TW Ignoring Time Typ.18 ms (CTW = 10 nF) Monitoring Time Typ.18 ms (CTW = 10nF) Reset Time Typ.9.5 ms (C = 10nF) TW Each time is adjustable with an external capacitor. APPLICATIONS Power source for car accessories including car audio equipment, car navigation system, and ETC system. Power source for control units including EV inverter and charge control. 2