Volt Supervisor Voltage Supervisory 20-Pin VQFN EP T/R

The TPS3860x0 family of supply voltage supervisors (SVSs) can monitor four power rails that are greater than 0.4V and one power rail less than 0.4V (including negative voltage) with a 0.25% (typical) threshold accuracy. Each of the four supervisory circuits (SVS-n) assert a RESETn\ or RESETn output signal when the SENSEm input voltage drops below the programmed threshold. With external resistors, the threshold of each SVS-n can be programmed (where n = 1, 2, 3, 4 and= 1, 2, 3, 4L, 4H). Each SVS-n has a programmable delay before releasing RESETn\ or RESETn. The delay time can be set independently for each SVS from 1.4ms to 10s through the CTn pin connection. Only SVS-1 has an active-low manual reset (MR\) input; a logic-low input to MR\ asserts RESET1\ or RESET1. SVS-4 monitors the threshold window using two comparators. The extra comparator can be configured as a fifth SVS to monitor negative voltage with voltage reference output VREF. The TPS3860x0 has a very low quiescent current of 11µA (typical) and is available in a small, 4mm × 4mm, QFN-20 package.

Four Independent Voltage Supervisors

Channels 1, 2, 3: Adjustable Threshold Down to 0.4V

Channel 4: Adjustable Threshold at Any Positive/Negative Voltage

Adjustable Delay Time: 1.4ms to 10s

Threshold Accuracy: 0.25% typ

Very Low Quiescent Current: 11µA typ

Channel 1: Manual Reset (MR) Input

Channel 4: Window Comparator

Watchdog Timer with Dedicated Output

Well-Controlled Output During Power-Up

TPS386000: Open-Drain RESETn and WDO

TPS386040: Push-Pull RESETn and WDO

Package: 4mm × 4mm, 20-pin QFN