The TPS3860x0 family of supply voltage supervisors (SVSs) can monitor four power railsthat are greater than 0.4 V and one power rail less than 0.4 V (including negative voltage) with a0.25% (typical) threshold accuracy. Each of the four supervisory circuits (SVS-n) assert aRESETn or RESETn output signal when the SENSEm input voltage drops below theprogrammed threshold. With external resistors, the threshold of each SVS-n can be programmed (wheren = 1, 2, 3, 4 and m = 1, 2,3, 4L, 4H).
Each SVS-n has a programmable delay before releasing RESETn orRESETn. The delay time can be set independently for each SVS from 1.4 ms to 10 s through the CTnpin connection. Only SVS-1 has an active-low manual reset (MR) input; alogic-low input to MR asserts RESET1 orRESET1.
SVS-4 monitors the threshold window using two comparators. The extra comparator can beconfigured as a fifth SVS to monitor negative voltage with voltage reference output VREF.
The TPS3860x0 has a very low quiescent current of 11 µA (typical) and is available in asmall, 4-mm x 4-mm, VQFN-20 package.