Inicio Gestión de la energía Supervisor & reset ICs

TPS3851

ACTIVO

Supervisión de tensión de alta precisión con temporizador de vigilancia integrado

Se encuentra disponible una versión más nueva de este producto

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Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
NUEVO TPS35-Q1 ACTIVO Supervisor de precisión con corriente de nanoquiescencia y temporizador de vigilancia para au 250-nA IQ, enhanced watchdog accuracy, compact packaging, and on-the-fly programming

Detalles del producto

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.674, 1.728, 2.325, 2.4, 2.79, 2.88, 3.069, 3.168, 4.65, 4.8 Features Manual reset capable, Timeout watchdog, Undervoltage monitor only, Watchdog disable, Watchdog timer Reset threshold accuracy (%) 0.8 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Open-drain Time delay (ms) 200 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.674, 1.728, 2.325, 2.4, 2.79, 2.88, 3.069, 3.168, 4.65, 4.8 Features Manual reset capable, Timeout watchdog, Undervoltage monitor only, Watchdog disable, Watchdog timer Reset threshold accuracy (%) 0.8 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Open-drain Time delay (ms) 200 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
VSON (DRB) 8 9 mm² 3 x 3
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy
  • Low quiescent current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • Open-drain outputs
  • Precision undervoltage monitoring:
    • Supports common rails from 1.8 V to 5.0 V
    • 4% and 7% Undervoltage thresholds available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Factory-programmed precision watchdog and reset timers
  • Manual reset input (MR)
  • Available in a small 3-mm × 3-mm, 8-Pin VSON package
  • Junction operating temperature range: –40°C to +125°C
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy
  • Low quiescent current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • Open-drain outputs
  • Precision undervoltage monitoring:
    • Supports common rails from 1.8 V to 5.0 V
    • 4% and 7% Undervoltage thresholds available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Factory-programmed precision watchdog and reset timers
  • Manual reset input (MR)
  • Available in a small 3-mm × 3-mm, 8-Pin VSON package
  • Junction operating temperature range: –40°C to +125°C

The TPS3851 combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851 also includes accurate hysteresis on the undervoltage threshold making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3851 includes a programmable 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 watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

TPS3851 is available in a small 3.00-mm × 3.00-mm, 8-pin VSON package.

The TPS3851 combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851 also includes accurate hysteresis on the undervoltage threshold making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-precision delay timing.

The TPS3851 includes a programmable 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 watchdog timeouts can be programmed either by an external capacitor, or by factory-programmed default delay settings. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

TPS3851 is available in a small 3.00-mm × 3.00-mm, 8-pin VSON package.

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TPS3851-Q1 ACTIVO Supervisión automotriz de tensión de alta precisión con temporizador de vigilancia integrado AEC-Q100 qualified version of this device
Funcionalidad similar a la del dispositivo comparado
TPS3123 ACTIVO Supervisor de tensión de alimentación, activo-bajo, con inserción y extracción, temporizador de vigi Fixed watchdog and reset time delay in a smaller SOT-23 package with push-pull output
TPS3431 ACTIVO Temporizador de vigilancia programable estándar con activación A standalone watchdog timer with no built-in voltage monitoring feature

Documentación técnica

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Tipo Título Fecha
* Data sheet TPS3851 Precision Voltage Supervisor with Integrated Watchdog Timer datasheet (Rev. A) PDF | HTML 20 may 2021
Application note Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) 17 mar 2020
Selection guide Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) 28 feb 2020
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 jun 2019
Technical article Exploring watchdog timer applications PDF | HTML 02 feb 2017
Technical article What is a watchdog timer and why is it important? PDF | HTML 11 ene 2017

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

TPS3851EVM-780 — Supervisor de alta precisión TPS3851 con módulo de evaluación de vigilancia de ventana

The TPS3851EVM-780 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS3851 low-quiescent current, 0.8% accuracy supervisor with integrated window watchdog timer. The EVM circuit board is configured to be a reference design for (...)
Guía del usuario: PDF
Modelo de simulación

TPS3851XyyE PSpice Transient Model (Rev. A)

SBVM652A.ZIP (66 KB) - PSpice Model
Modelo de simulación

TPS3851XyyE Unencrypted PSpice Transient Model (Rev. A)

SBVM653A.ZIP (7 KB) - PSpice Model
Modelo de simulación

TPS3851XyyS PSpice Transient Model (Rev. A)

SBVM650A.ZIP (66 KB) - PSpice Model
Modelo de simulación

TPS3851XyyS Unencrypted PSpice Transient Model (Rev. A)

SBVM651A.ZIP (6 KB) - PSpice Model
Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de 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 (...)
Paquete Pasadores Descargar
VSON (DRB) 8 Ver opciones

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

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