TPS3805H33-Q1

ACTIVE

Automotive, dual-rail (adjustable or 3.3-V system) voltage detector

TPS3805H33-Q1

ACTIVE

Product details

Number of supplies monitored 2 Threshold voltage 1 (typ) (V) 1.226, 3.05 Features Ease-of-use Reset threshold accuracy (%) 1.5 Iq (typ) (mA) 0.003 Output driver type/reset output Active-low, Push-Pull Time delay (ms) 0 Supply voltage (min) (V) 1.3 Supply voltage (max) (V) 6 Rating Automotive Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
Number of supplies monitored 2 Threshold voltage 1 (typ) (V) 1.226, 3.05 Features Ease-of-use Reset threshold accuracy (%) 1.5 Iq (typ) (mA) 0.003 Output driver type/reset output Active-low, Push-Pull Time delay (ms) 0 Supply voltage (min) (V) 1.3 Supply voltage (max) (V) 6 Rating Automotive Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
SOT-SC70 (DCK) 5 4.2 mm² 2 x 2.1
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet TPS380x-Q1 Voltage Detectors datasheet (Rev. C) PDF | HTML 24 Jul 2015
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Selection guide Automotive Supervisor and Reset IC Selection Guide 22 Feb 2016

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Evaluation board

TPS3803Q1EVM — Evaluation module for the TPS3803x-Q1 voltage detectors

The TPS3803Q1EVM evaluation module (EVM) includes the TPS3803-Q1 and TPS3805-Q1 family of supervisory circuits. These supervisor ICs provide circuit initialization and timing supervision primarily for DSPs and processor-based systems. The EVM features two versions of the (...)
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SOT-SC70 (DCK) 5 View options

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