TPS3808E中文资料德州仪器数据手册PDF规格书

1 Features

• Power-on reset generator with adjustable delay

time: 1.25 ms to 10 s

• Very low quiescent current: 0.6 μA typical

• High threshold accuracy: 1 typical

• Fixed threshold voltages for standard voltage rails

from 0.9 V to 5 V and adjustable voltage down to

0.405 V are available

• Manual reset ( MR) input

• Open-drain RESET output

• Temperature range: –40°C to 125°C

• Small SOT-23-6

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).