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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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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

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 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
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 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) Programmable 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 = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy
  • Low supply current: IDD = 10 µA (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 1.8 V to 5.0 V
    • 4% and 7% undervoltage thresholds available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 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 = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy
  • Low supply current: IDD = 10 µA (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 1.8 V to 5.0 V
    • 4% and 7% undervoltage thresholds available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 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 3.00-mm × 3.00-mm, 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 3.00-mm × 3.00-mm, 8-pin VSON package. The TPS3851-Q1 features wettable flanks that allow for easy optical inspection.
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類型 標題 日期
* Data sheet TPS3851-Q1 High-Accuracy Voltage Supervisor with Integrated Watchdog Timer datasheet (Rev. A) PDF | HTML 2021年 9月 23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

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 (...)
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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模擬工具

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

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 (...)
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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

This reference design is focused on the power tree for an automotive infotainment display unit covering various power supply rails including two off-battery converters providing 5.0-V and 3.3-V, and intermediary system rails of 1.8-V and 1.1-V. The test results demonstrate high efficiency, low (...)
Test report: PDF
電路圖: PDF
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