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Product details

Parameters

Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) 2.25, 2.64, 2.93, 4.55 Features Ease-of-use Reset threshold accuracy (%) 2.2 Output driver type/reset output Active-low, Push-pull Time delay (ms) 200 VCC (Max) (V) 6 Rating Catalog VCC (Min) (V) 2 Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 85 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

SOT-23 (DBV) 3 8 mm² 2.9 x 2.8 open-in-new Find other Supervisor & reset ICs

Features

  • 3-Pin SOT-23 Package
  • Supply Current of 9 7micro;A (Typical)
  • Precision Supply Voltage Monitor
    2.5 V, 3 V, 3.3 V, 5 V
  • Pin-For-Pin Compatible With MAX 809
  • Temperature Range:  –40°C to +85°C
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Description

The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 200 ms, starts after VDD has risen above the threshold voltage VIT. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed sense-threshold voltage VIT set by an internal voltage divider.

The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 3-pin SOT-23. The TPS3809 devices are characterized for operation over a temperature range of –40°C to 85°C.

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Technical documentation

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No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet 3-Pin Supply Voltage Supervisors, TPS3809x datasheet (Rev. C) Oct. 24, 2013
Selection guides Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) Feb. 28, 2020
More literature Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application notes Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) Oct. 09, 2018
User guides TPS3813XXXEVM for Processor Voltage Supervisor User's Guide Sep. 30, 2016
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 PMP5568 Test Results Dec. 18, 2013

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
SLUR941.PDF (26 KB)
BILL OF MATERIALS (BOM) Download
SLUR942.PDF (24 KB)
BILL OF MATERIALS (BOM) Download
SLUR943.PDF (29 KB)
BILL OF MATERIALS (BOM) Download
SLUR944.PDF (49 KB)
SCHEMATICS Download
SLUC383.ZIP (5321 KB)
SCHEMATICS Download
SLUR945.PDF (59 KB)
SCHEMATICS Download
SLUR946.PDF (171 KB)
SCHEMATICS Download
SLUR947.PDF (462 KB)
SCHEMATICS Download
SLUR948.PDF (86 KB)

Reference designs

REFERENCE DESIGNS Download
Cranking Simulator Reference Design for Automotive Applications
PMP7233 This design is a cranking simulator which generates three different cranking pulses to test automotive systems up to 50W. A microcontroller sets the output voltage of a synchronous buck in the range of 2-15V accordingly to the programmed curves. Output current is in the range of 3.3-25A. It is a (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
A Fully Featured, 350W Offline High Performance Power Supply Reference Design
PMP5568 This project is a complete 350W, high performance, high speed offline power supply solution. It contains a novel, microcontroller-driven synchronous bridge rectifier, a 2-phase interleaved PFC stage and a phase-shifted fullbridge as down converter. It has an universal input (85 .. 265V AC) and the (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
RGB-LED driver with microcontroller-based color mixing
PMP7247 — This design contains three TPS92551 LED-driver modules (buck topology) which can be independently PWM-modulated by a microcontroller for color mixing or dimming. The maximum input voltage is 50V and the circuit offers the possibility, to use several driver boards in master-slave configuration.

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 3 View options

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