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重設與看門狗 IC

TPS3851

現行

具整合式看門口定時器的高精度電壓監控器

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產品規格表

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TPS35-Q1 現行 具有逾時監視計時器的車用毫微靜態電流精密監控器 250-nA IQ, enhanced watchdog accuracy, compact packaging, and on-the-fly programming

TPS3851

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog 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 Watchdog timer WDI (s) Programmable Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 Operating temperature range (°C) -40 to 125
Rating Catalog 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 Watchdog timer WDI (s) Programmable Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 Operating temperature range (°C) -40 to 125
VSON (DRB) 8 9 mm² 3 x 3
  • Input voltage range: VDD = 1.6V to 6.5V
  • 0.8% Voltage threshold accuracy
  • Low quiescent current: IDD = 10µA (typical)
  • User-programmable watchdog timeout
  • Open-drain outputs
  • Precision undervoltage monitoring:
    • Supports common rails from 1.8V to 5.0V
    • 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 3mm × 3mm, 8 pin VSON package
  • Junction operating temperature range: –40°C to +125°C
  • Input voltage range: VDD = 1.6V to 6.5V
  • 0.8% Voltage threshold accuracy
  • Low quiescent current: IDD = 10µA (typical)
  • User-programmable watchdog timeout
  • Open-drain outputs
  • Precision undervoltage monitoring:
    • Supports common rails from 1.8V to 5.0V
    • 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 3mm × 3mm, 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 an excellent choice 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 3.00mm × 3.00mm, 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 an excellent choice 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 3.00mm × 3.00mm, 8-pin VSON package.
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功能與所比較的裝置相似
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類型 標題 日期
* Data sheet TPS3851 Precision Voltage Supervisor with Integrated Watchdog Timer datasheet (Rev. B) PDF | HTML 2025年 6月 19日
Application note Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) 2020年 3月 17日
Selection guide Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) 2020年 2月 28日
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 2019年 6月 28日
Technical article Exploring watchdog timer applications PDF | HTML 2017年 2月 2日
Technical article What is a watchdog timer and why is it important? PDF | HTML 2017年 1月 11日

設計與開發

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開發板

TPS3851EVM-780 — 具有視窗看門狗的 TPS3851 高準確度監控器評估模組

TPS3851EVM-780 評估模組 (EVM) 設計為一個典型配置，用於評估 TPS3851 的操作與效能。TPS3851 是一款具有整合式視窗型看門狗計時器的低靜態電流、0.8% 精確度的電壓監控器。此 EVM 電路板配置為工程應用中的參考設計，適用於需要低功耗與高精度電壓監控的場景。
使用指南: PDF
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模擬型號

TPS3851XyyE PSpice Transient Model (Rev. A)

SBVM652A.ZIP (66 KB) - PSpice Model
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TPS3851XyyE Unencrypted PSpice Transient Model (Rev. A)

SBVM653A.ZIP (7 KB) - PSpice Model
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TPS3851XyyS PSpice Transient Model (Rev. A)

SBVM650A.ZIP (66 KB) - PSpice Model
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TPS3851XyyS Unencrypted PSpice Transient Model (Rev. A)

SBVM651A.ZIP (6 KB) - PSpice Model
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