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Product details

Parameters

Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) Adjustable, 1.4, 3.05 Features Ease-of-use Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-low, Open-drain Time delay (ms) 0 VCC (Max) (V) 6 Rating HiRel Enhanced Product VCC (Min) (V) 1.3 Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125, -55 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

Features

  • Controlled Baseline
    • One Assembly/Test Site, One Fabrication Site
  • Extended Temperature Performance of –55°C to +125°C
  • Enhanced Diminishing Manufacturing Sources (DMS) Support
  • Enhanced Product-Change Notification
  • Qualification Pedigree(1)
  • Single Voltage Detector (TPS3803): Adjustable/1.5 V
  • Dual Voltage Detector (TPS3805): Adjustable/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)
  • 5-Pin SC–70 Package
  • APPLICATIONS
    • Applications Using DSPs, Microcontrollers, or Microprocessors
    • Wireless Communication Systems
    • Portable/Battery-Powered Equipment
    • Programmable Controls
    • Intelligent Instruments
    • Industrial Equipment
    • Notebook/Desktop Computers
    • Automotive Systems

(1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

All trademarks are the property of their respective owners.

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Description

The TPS3803 and TPS3805 families of supervisory circuits provide circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

The TPS3803G15 device has a fixed-sense threshold voltage VIT set by an internal voltage divider, whereas the TPS3803–01 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 devices provide a second adjustable SENSE input. RESET is asserted in case any 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.

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Technical documentation

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Type Title Date
* Datasheet Voltage Detectors datasheet (Rev. C) Jun. 26, 2007
More literature Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Technical articles A New Understanding: Blast Motion redefines movement, tracking and training for athletes. Aug. 06, 2014
Technical articles Improving Fly-Buck Regulation Using Opto (Part-1) Jul. 15, 2014
Technical articles Altium and WEBENCH – together at last Jul. 12, 2014
Technical articles Using telemetry in point-of-load applications Jun. 24, 2014
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.

Design tools & simulation

BILL OF MATERIALS (BOM) Download
SLUR179.PDF (24 KB)
SCHEMATICS Download
SLUR178.PDF (134 KB)

Reference designs

REFERENCE DESIGNS Download
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

Ordering & quality

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