1 Features

1• Four Independent Voltage Supervisors

• Channel 1:

– Adjustable Threshold Down to 0.4 V

– Manual Reset (MR) Input

• Channels 2, 3:

– Adjustable Threshold Down to 0.4 V

• Channel 4:

– Adjustable Threshold at Any Positive or

Negative Voltage

– Window Comparator

• Adjustable Delay Time: 1.4 ms to 10 s

• Threshold Accuracy: 0.25% Typical

• Very Low Quiescent Current: 11 μA Typical

• Watchdog Timer With Dedicated Output

• Well-Controlled Output During Power Up

• TPS386000: Open-Drain RESETn and WDO

• TPS386040: Push-Pull RESETn and WDO

• Package: 4-mm × 4-mm, 20-Pin VQFN

2 Applications

• All DSP and Microcontroller Applications

• All FPGA and ASIC Applications

• Telecom and Wireless Infrastructure

• Industrial Equipment

• Analog Sequencing

3 Description

The TPS3860x0 family of supply voltage supervisors

(SVSs) can monitor four power rails that are greater

than 0.4 V and one power rail less than 0.4 V

(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 m = 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 1.4 ms to 10

s 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

11 μA (typical) and is available in a small, 4-mm x 4-

mm, VQFN-20 package.