1 Features

? Functional Safety-Compliant

– Development target for Functional Safety

applications

– Documentation to aid IEC 61508 system design

– Systematic capability up to SIL 3

– Hardware capability up to SIL 3

? Monitor state-of-the art SOCs

– ±6 mV threshold accuracy (–40°C to +125°C)

– Input voltage range: 2.5 V to 5.5 V

– Undervoltage lockout (UVLO): 2.48 V

– Low standby quiescent current: 200 μA

– 6 channels with 2 remote sense

– Fixed window threshold levels

? 5 mV steps from 0.2 V to 1.475 V

? 20 mV steps from 0.8 V to 5.5 V

? Miniature solution and minimal component cost

– 3 mm x 3 mm QFN package

– Adjustable glitch immunity via I2C

– User adjustable voltage threshold levels via I2C

? Designed for safety applications

– Active-low open-drain NIRQ output

– Built-in 8-bit ADC for real-time voltage readouts

– Cyclic Redundancy Checking (CRC)

– Packet Error Checking (PEC)

– Sequence and fault logging

? Sync function for rail tagging

– Connect with a multichannel sequencer for

sequencing functionality

2 Applications

? Medical robotics

? Industrial robotics

? Server switches

? Motor drivers

3 Description

The TPS389006 device is a SIL-3 compliant sixchannel

window supervisor IC with two remote sense

pins available in a 16-pin 3 mm x 3 mm QFN

package. This high accuracy multichannel voltage

supervisor is designed for systems that operate on

low-voltage supply rails and have narrow margin

supply tolerances.

Remote sense pins enable a highly accurate voltage

measurement on the high current core rail by

accounting for voltage drop across PCB traces. I2C

functionality gives flexibility in selecting thresholds,

reset delays, glitch filters, and pin functionality. The

internal glitch immunity and noise filters eliminate

the need for external RC components to reduce

false resets resulting from power transients. In

addition, device does not require any external

resistors for setting overvoltage and undervoltage

reset thresholds, which further optimizes overall

accuracy, cost, solution size, and improves reliability

for safety systems.

This device offers CRC error checking, sequence

logging during turn ON or turn OFF, and a builtin

ADC for voltage readouts to provide redundant

error checking. In addition, TPS389006 offers a sync

feature for tagging rails as they come up. The

TPS389006 device also pairs with TI's power-supply

sequencer TPS38700 to ensure proper power-on

sequence in addition to voltage monitoring for SIL-3

level compliance.