High-accuracy voltage supervisor with Integrated watchdog timer

The TPS3851 combines a precision voltage

supervisor with a programmable watchdog timer. The TPS3851 comparator achieves a 0.8%

accuracy(–40°C to +125°C) for the undervoltage

(VITN) threshold on the VDD pin. The TPS3851 also includes accurate hysteresis

on the undervoltage threshold making the device an excellent choice for use with tight

tolerance systems. The supervisor RESET delay features a 15% accuracy,

high-precision delay timing.

The TPS3851 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.

TPS3851 is available in a small 3.00mm ×

3.00mm, 8-pin VSON package.