描述 Description

The NCV8508B is a 5.0 V and 3.3 V precision micropower Low Dropout (LDO)voltage regulator with 250 mA output current capability. Microprocessor control logic includes an active RESET (with DELAY), wakeup and watchdog. The NCV8508B Wakeup function brings the microprocessor out of Sleep mode. The microprocessor in turn signals its Wakeup status back to the NCV8508B by issuing a Watchdog signal. The active RESET circuit operates correctly at an output voltage as low as 1.0 V. The RESET function is activated during the power up sequence, during normal operation if the output voltage drops below the regulation limits or if the regulator does not receive a Watchdog signal within a Wakeup period. The Watchdog logic function monitors an input signal (WDI) from the microprocessor. The NCV8508B responds to the falling edge of the Watchdog signal which it expects at least once during each Wakeup period. Its robustness and integrated protection features make it suitable for severe automotive environments.

特性 Features

? 5.0V and 3.3V +/-3% Output Voltage / 250mA Output Current
? Tight Regulation Limits
? Low Quiescent Current (100 μA typ) at full load
? Quiescent current independant from load current; ideal for systems requiring
? Wakeup, Watchdog, Reset and Adjustable Delay
? MPU control - design flexibility
? Integrated Protection Features: +60V Input Peak Transient Thermal ShutdownShort Circuit
? Limit number of external components:Robust load dump tolerance Self protection Self protection
? AEC Q100 qualified, PPAP capable

應(yīng)用 Application

? Body and Chassis
? Powertrain
? Engine Control Unit
? Automotive