1 Features

1? Qualified for Automotive Applications

? Single Voltage Detector (TPS3803): Adjustable

and 1.5 V

? Dual Voltage Detector (TPS3805): Adjustable and

3.3 V

? High ±1.5% Threshold Voltage Accuracy

? Supply Current: 3 μA Typical at VDD = 3.3 V

? Push/Pull Reset Output (TPS3805),

Open-Drain Reset Output (TPS3803)

? Temperature Range: –40°C to 125°C

? 5-Pin SC-70 Package

2 Applications

? Applications Using DSPs, Microcontrollers, or

Microprocessors

? Advanced Driver Assistance Systems

? Automotive Infotainment

? Automotive Cluster

3 Description

The TPS3803-Q1 and TPS3805-Q1 families of

supervisory circuits provide circuit initialization and

timing supervision, primarily for DSPs and processor-

based systems.

The TPS3803G15-Q1 device has a fixed-sense

threshold voltage VIT set by an internal voltage

divider, whereas the TPS3803-01-Q1 has an

adjustable SENSE input that can be configured by

two external resistors. In addition to the fixed sense

threshold monitored at VDD, the TPS3805-Q1 devices

provide a second adjustable SENSE input. RESET is

asserted in case either of the two voltages drops

below VIT.

During power on, RESET is asserted when supply

voltage VDD becomes higher than 0.8 V. Thereafter,

the supervisory circuit monitors VDD (and/or SENSE)

and keeps RESET active as long as VDD or SENSE

remains below the threshold voltage VIT. As soon as

VDD (SENSE) rises above the threshold voltage VIT,

RESET is deasserted again. The product spectrum is designed for 1.5-V, 3.3-V, and adjustable supply

voltages.

The devices are available in a 5-pin SC-70 package.

The TPS3803-Q1 and TPS3805-Q1 devices are

characterized for operation over a temperature range

of –40°C to 125°C.