1 Features

• Wide supply voltage range: 1.9V to 42V

• VDD, SENSE, and RESET are rated to 42V

• Low quiescent current: 850nA (typical)

• High threshold accuracy: 0.5% (typical)

• Fixed internal threshold voltages: 2.7V to 9.5V

• Adjustable voltage variant: 0.7V

• Capacitor adjustable delay time with CTR pin

• Capacitor adjustable de-glitch time with CTS pin

• Undervoltage open-drain, active-low output

• Overvoltage open-drain, active-low and active-high

output

• Temperature range: –40°C to 125°C

• Small size: SOT5X3 (DRL)

2 Applications

• Factory automation

• Motor drives

• Power delivery

• Enterprise systems

• Grid infrastructure

3 Description

The TPS3842 is a 42V voltage supervisor with

850nA IDD, 0.5% accuracy, and a fast detection

time. This device directly connects to 12V / 24V

voltage rail for continuous monitoring of undervoltage

(UV) or overvoltage (OV) conditions. The TPS3842

comes in a small DRL package for size constrained

applications. Built-in hysteresis on the SENSE pin

prevents false reset signals when monitoring a supply

voltage rail. 1%, 5%, and 10% hysteresis voltage

options are available to offer design flexibility to

support voltage transients.

SENSE is decoupled from VDD and can monitor

higher and lower voltages than VDD. Fixed

threshold variants provide accurate low-Iq voltage

monitoring. Adjustable threshold variants offer flexible

undervoltage threshold setting with external resistors.

TPS3842 offers capacitor programmable de-glitch

on the SENSE with the CTS pin and capacitor

programmable reset delay timing with the CTR pin.