NCV8881

NCV8881 Buck Regulator Automotive, Watchdog 1.5 A The NCV8881 consists of a Buck switching regulator (SMPS) with a combination SMPS output undervoltage monitor and CPU watchdog circuit. In addition, two fixed−voltage low dropout regulator outputs are provided, and share an LDO output voltage status output. Once enabled, regulator operation continues until the Watchdog signal is no longer present. The NCV8881 is intended for Automotive, battery−connected applications that must withstand a 40 V load dump. The switching regulator is capable of converting the typical 9 V to 19 V automotive input voltage range to outputs from 3.3 V to 8 V at a constant switching frequency, which can be resistor programmed or synchronized to an external clock signal. Enable input threshold and hysteresis are programmable, with the enable input state replicated at an open drain Ignition Buffer output. The regulators are protected by current limiting, input overvoltage and overtemperature shutdown, as well as SMPS short circuit shutdown. Features 1.5 A Switching Regulator (internal power switch) 100 mA, 5 V LDO Output 40 mA, 8.5 V LDO Output Operating Range 5 V to 19 V Programmable SMPS Frequency SMPS can be Synchronized to an External Clock Programmable SMPS Output Voltage Down to 0.8 V $2% Reference Voltage Tolerance Internal SMPS Soft−Start Voltage−mode SMPS Control SMPS Cycle−by−Cycle Current Limit and Short−Circuit Protection Internal Bootstrap Diode Logic level Enab...