Automotive, high-accuracy voltage supervisor with Integrated watchdog timer

The TPS3851-Q1 device combines a

precision voltage supervisor with a programmable watchdog timer. The TPS3851-Q1

comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage

(VITN) threshold on the VDD pin. The TPS3851-Q1 also includes

accurate hysteresis on the undervoltage threshold making the device ideal for use

with tight tolerance systems. The supervisor RESET delay

features a 15% accuracy, high-precision delay timing.

The TPS3851-Q1 includes a programmable

watchdog timer for a wide variety of applications. The dedicated watchdog output

(WDO) enables increased resolution to help determine the

nature of fault conditions. The watchdog timeouts can be programmed either by an

external capacitor, or by factory-programmed default delay settings. The watchdog

can be disabled via logic pins to avoid undesired watchdog timeouts during the

development process.

The TPS3851-Q1 is available in a

small 3.00mm × 3.00mm, 8-pin VSON package. The

TPS3851-Q1 features wettable flanks that allow for easy optical inspection.