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TPS3851-Q1

現行

具整合式看門狗定時器的車用高精度電壓監控器

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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 quiescent current, with enhanced watchdog accuracy, compact packaging and on-the-fly programming

TPS3851-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.8, 2.5, 3, 3.3, 5 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 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Rating Automotive Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.8, 2.5, 3, 3.3, 5 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 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
VSON (DRB) 8 9 mm² 3 x 3
  • 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
  • Functional Safety-Capable
  • Input voltage range: VDD = 1.6V to 6.5V
  • 0.8% Voltage threshold accuracy
  • Low supply current: IDD = 10µA (typical)
  • User-programmable watchdog timeout
  • Factory programmed precision watchdog and reset timers:
  • Manual reset input (MR)
  • 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
  • Available in a small 3mm × 3mm, 8-Pin VSON package
  • 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
  • Functional Safety-Capable
  • Input voltage range: VDD = 1.6V to 6.5V
  • 0.8% Voltage threshold accuracy
  • Low supply current: IDD = 10µA (typical)
  • User-programmable watchdog timeout
  • Factory programmed precision watchdog and reset timers:
  • Manual reset input (MR)
  • 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
  • Available in a small 3mm × 3mm, 8-Pin VSON package

The TPS3851-Q1 device combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851-Q1 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851-Q1 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-Q1 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.

The TPS3851-Q1 is available in a small 3.00mm × 3.00mm, 8-pin VSON package. The TPS3851-Q1 features wettable flanks that allow for easy optical inspection.

The TPS3851-Q1 device combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851-Q1 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold on the VDD pin. The TPS3851-Q1 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-Q1 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.

The TPS3851-Q1 is available in a small 3.00mm × 3.00mm, 8-pin VSON package. The TPS3851-Q1 features wettable flanks that allow for easy optical inspection.
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TPS3851 現行 具整合式看門口定時器的高精度電壓監控器 Catalog version of this device
功能與所比較的裝置相似
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重要文件 類型 標題 格式選項 日期
* Data sheet TPS3851-Q1 High-Accuracy Voltage Supervisor with Integrated Watchdog Timer datasheet (Rev. B) PDF | HTML 2025年 7月 7日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
Functional safety information TPS3851-Q1 Functional Safety FIT Rate and Failure Mode Distribution 2019年 12月 19日
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 2019年 6月 28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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TPS3851XyyE PSpice Transient Model (Rev. A)

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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)

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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
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參考設計

PMP22030 — 適用於車載資訊娛樂系統顯示器的高效、低熱、符合 CISPR 25 5 類標準電源參考設計

此參考設計著重於汽車資訊娛樂顯示單元的電源樹，涵蓋各種電源供應軌，包括兩個提供 5.0-V 與 3.3-V 的無電池轉換器，以及 1.8-V 與 1.1-V 的中間系統軌。測試結果證明效率高、散熱低，符合 CISPR 25 第 5 級傳導式排放規範。 
Test report: PDF
電路圖: PDF
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VSON (DRB) 8 Ultra Librarian
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  • 認證摘要
  • 進行中的可靠性監測
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