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Product details

Parameters

Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) Adjustable, 0.84, 0.86, 1.06, 1.12, 1.15, 1.67, 1.73, 2.33, 2.4, 2.79, 2.88, 3.07, 3.17, 4.65, 4.8 Features Undervoltage and overvoltage monitor, Watchdog disable, Watchdog timer, Window watchdog Reset threshold accuracy (%) 1 Output driver type/reset output Active-low, Open-drain Time delay (ms) Programmable TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (sec) Programmable Operating temperature range (C) -40 to 125 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

VSON (DRC) 10 9 mm² 3 x 3 open-in-new Find other Supervisor & reset ICs

Features

  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • Input Voltage Range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage Threshold Accuracy (Max)
  • Low Supply Current: IDD = 10 µA (typ)
  • User-Programmable Watchdog Timeout
  • User-Programmable Reset Delay
  • Factory Programmed Precision Watchdog and Reset Timers:
    • ±15% Accurate WDT and RST Delays
  • Open-Drain Outputs
  • Precision Over- and Undervoltage Monitoring:
    • Supports Common Rails from 0.9 V to 5.0 V
    • 4% and 7% Fault Windows Available
    • 0.5% Hysteresis
  • Watchdog Disable Feature
  • Available in a Small 3-mm × 3-mm, 10-Pin VSON Package

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Description

The TPS3850-Q1 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850-Q1 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds. The TPS3850-Q1 also includes accurate hysteresis on both thresholds, making the device ideal for use with tight tolerance systems. The supervisor RESET delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The factory-programmed RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3850-Q1 includes a programmable window watchdog timer for a wide variety of applications. The dedicated watchdog output (WDO) enables increased resolution to help determine the nature of fault conditions. The window watchdog timeouts can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3850-Q1 is available in a small 3.00-mm ×
3.00-mm, 10-pin VSON package. The TPS3850-Q1 features wettable flanks for easy optical inspection.













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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 7
Type Title Date
* Datasheet TPS3850-Q1 Precision Voltage Supervisor with Programmable Window Watchdog Timer datasheet (Rev. A) Apr. 21, 2017
Application notes TPS3850-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 19, 2019
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Technical articles How voltage references and supervisors help achieve ASIL functional safety goals May 10, 2019
Technical articles How diagnostics help your ADAS design achieve higher levels of functional safety May 06, 2019
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
29
Description
The TPS3850EVM-781 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS3850 low-quiescent current (Iq), 0.8% accurate supervisor with integrated watchdog timer.
Features
  • High threshold accuracy: 0.8%
  • User-programmable watchdog timer
  • User-programmable reset delay
  • Open-drain RESET output
  • Independent open-drain watchdog output

Design tools & simulation

SIMULATION MODELS Download
SBVM648A.ZIP (9 KB) - PSpice Model
SIMULATION MODELS Download
SBVM649A.ZIP (67 KB) - PSpice Model
SIMULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)

Reference designs

REFERENCE DESIGNS Download
ADAS power reference design with improved voltage supervision
TIDA-050008 This TI design provides an automotive power solution with additional precision voltage supervision and window watchdog for safety MCUs in advanced driver assistance systems (ADAS). These ADAS systems can control driving functions, such as automated emergency brake, lane keep assist, and adaptive (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VSON (DRC) 10 View options

Ordering & quality

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