R3154N Series 42 V Input Window Voltage Detector with Diagnostic Function for Automotive Applications No. EC-528-210224 OVERVIEW The R3154N is a Window Voltage Detector suitable for functional safety requirement. This device monitors over-and-under output voltages from the power supply IC for a microprocessor and a sensor, and detects abnormal voltage of systems. Its undervoltage detection down to 0.55 V is suitable for low power devices. Also, operation check of voltage detection is available with the TEST pin. KEY BENEFITS Power supply from battery enables the voltage detector to operate independently from the power source. High-accuracy over-and-undervoltage detection from -1.25% to 0.75% and the hysteresis of Max. 0.75%. Overvoltage detection: 0.75 V at minimum, Undervoltage detection: 0.55 V at minimum. Compact package of SOT-23-6. Safe and secure adjacent pin configuration to prevent a short circuit. KEY SPECIFICATIONS SELECTION GUIDE Operating Voltage Range (Max. Rating): Quantity per Product Name Package 3.0 V to 42.0 V (50.0 V) Reel Operating Temperature Range: 40C to 125C R3154NxxxA-TR- SOT-23-6 3,000 pcs Supply Current: Typ. 2.0 A xxx: The combination of an overvoltage detection Overvoltage Detection: 0.75 V to 3.70 V (in 0.01 V step) setting voltage (VOVSET) and an undervoltage Accuracy (VOVSET > 0.9 V): 0.5% (Ta = 25C) detection setting voltage (VUVSET) 1.25% to 0.75% (40C to 125C) Refer to Product-specific Electrical Characteristics Undervoltage Detection: 0.55 V to 3.30 V (in 0.01 V step) for details. Accuracy (VUVSET > 0.66 V): 0.5% (Ta = 25C) 1.25% to 0.75% (40C to 125C) : Quality Class Refer to SELECTION GUIDE for details. Detection Release Hysteresis: Typ. 0.5% Detection Release Time: Typ. 20 s TYPICAL APPLICATIONS Release Delay Time: Typ. 4 ms (C = 0.01 F) D Battery VIN Output Type: Nch. Open Drain DCDC MPU PACKAGE RES B VDD VIN GPO0 CD SENSE Sub CD R3154N MPU TEST DOUT GPI GPO1 SOT-23-6 2.9 x 2.8 x 1.1 (mm) CD: a capacitor corresponding to the set release delay time APPLICATIONS Power supply voltage monitoring for systems which require fault detection, such as ECU and ADAS. Power supply voltage monitoring for control units such as EV inverters and Charge Controllers. 1 R3154N No. EC-528-210224 SELECTION GUIDE The detection setting voltages and quality class are user-selectable. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R3154NxxxA-TR- SOT-23-6 3,000 pcs Yes Yes xxx: The combination of an overvoltage detection setting voltage (V ) and an undervoltage detection OVSET setting voltage (V ). UVSET Refer to Product-specific Electrical Characteristics for details. : Quality Class Quality Class Operating Temperature Range Test Temperature A AE 40C to 125C 25C, High R R 40C to 125C Low, 25C, High BLOCK DIAGRAM VDD VCC INT Regulator UVLO SENSE UVCMP UVCMP OVCMP + Delay OVCMP Circuit + DOUT VREF TEST GND TEST CD R3154N Block Diagram 2