1 Features

? AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to +125°C

? Undervoltage monitoring for power rails

– Reliable monitoring with high threshold

accuracy (1% typical)

– Fixed voltage threshold options from 0.9 V to 5

V

– Adjustable voltage option available (0.405 V)

– Separate Sense pin for monitoring and VDD pin

for power

? Miniature solution with ultra-low power

consumption

– 0.6 μA typical quiescent current

– Compact 6-pin SOT23 package (2.9 mm x 1.6

mm)

? Highly configurable reset time delay to prevent

unsafe power on

– Adjustable from 1.25 ms to 10 s

? Separate Manual Reset Input (MR) to assert

RESET output on demand

2 Applications

? ADAS domain controller

? Automotive gateway

? Automotive head unit

? Digital cockpit processing unit

? Telematics control unit

? Driver monitoring

3 Description

The TPS3808E-Q1 family of microprocessor

supervisory circuits monitors system voltages from 0.4

V to 5 V, asserting an open-drain RESET signal when

the SENSE voltage drops below a preset threshold

or when the manual reset (MR) pin drops to a

logic low. The RESET output remains low for the

user-adjustable delay time after the SENSE voltage

and manual reset (MR) return above the respective

thresholds.

The TPS3808E-Q1 device uses a precision reference

to achieve 0.5% threshold accuracy. The reset delay

time can be set to 20 ms by disconnecting the CT

pin, 300 ms by connecting the CT pin to VDD using

a resistor, or can be user-adjusted between 1.25 ms

and 10 s by connecting the CT pin to an external

capacitor. The TPS3808E device has a very low

typical quiescent current of 0.6 μA, and is designed

for battery-powered applications. The TPS3808E-Q1

is available in the SOT-23-6 , and is fully specified

over a temperature range of –40°C to 125°C (TJ).