Product details


Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) Adjustable, 1.4 Features Ease-of-use Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-low, Open-drain Time delay (ms) 0 Rating Automotive Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

SOT-SC70 (DCK) 5 4 mm² 2 x 2.1 open-in-new Find other Supervisor & reset ICs


  • 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
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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

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet TPS380x-Q1 Voltage Detectors datasheet (Rev. C) Jul. 24, 2015
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013
User guides PMP1941 TEST RESULTS Jan. 06, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
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 (...)
  • Major pins of device broken out into onboard testpoints
  • Onboard test points
  • Onboard jumpers for easy IC configuration and attachement for probes
  • Q200-qualified passives in EVM solution

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLUR179.PDF (24 KB)
SLUR178.PDF (134 KB)

Reference designs

Flyback, Buck for Automotive (4.5V @ 0.05A)
PMP1941 A triple-output non-isolated flyback converter provides a regulated low voltage and two high voltage rails. A buck converter with an input transient voltage-clamping circuit produces a 5V rail. The addition of a dithering circuit creates spread-spectrum operation on the switching frequency to lower (...)
Design files

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 5 View options

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