TPS3820

現行

具有 0.2-s 監控系統和手動重設功能的低電位作動、推挽式電壓監控器 (重設 IC)

產品詳細資料

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.93, 4.55 Features Manual reset capable, Watchdog timer Reset threshold accuracy (%) 2.4 Iq (typ) (mA) 0.015 Output driver type/reset output Active-low, Push-Pull Time delay (ms) 25 Supply voltage (min) (V) 1.1 Supply voltage (max) (V) 5.5 Rating Catalog Watchdog timer WDI (s) 0.2 Operating temperature range (°C) -40 to 85
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.93, 4.55 Features Manual reset capable, Watchdog timer Reset threshold accuracy (%) 2.4 Iq (typ) (mA) 0.015 Output driver type/reset output Active-low, Push-Pull Time delay (ms) 25 Supply voltage (min) (V) 1.1 Supply voltage (max) (V) 5.5 Rating Catalog Watchdog timer WDI (s) 0.2 Operating temperature range (°C) -40 to 85
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Power-on reset generator with a fixed delay time of 200 ms (TPS3823, TPS3824, TPS3825, and TPS3828) or 25 ms (TPS3820)
  • Manual reset input (TPS3820, TPS3823, TPS3825, and TPS3828)
  • Reset output available in active-low (TPS3820, TPS3823, TPS3824, and TPS3825), active-high (TPS3824 and TPS3825), and open drain (TPS3828)
  • Supply voltage supervision range: 2.5 V, 3 V, 3.3 V, 5 V
  • Watchdog timer (TPS3820, TPS3823, TPS3824, and TPS3828)
  • Supply current of 15 µA (typical)
  • 5-pin SOT-23 package
  • Temperature range: −40°C to 85°C (−40°C to 125°C for TPS3823A-33)
  • Power-on reset generator with a fixed delay time of 200 ms (TPS3823, TPS3824, TPS3825, and TPS3828) or 25 ms (TPS3820)
  • Manual reset input (TPS3820, TPS3823, TPS3825, and TPS3828)
  • Reset output available in active-low (TPS3820, TPS3823, TPS3824, and TPS3825), active-high (TPS3824 and TPS3825), and open drain (TPS3828)
  • Supply voltage supervision range: 2.5 V, 3 V, 3.3 V, 5 V
  • Watchdog timer (TPS3820, TPS3823, TPS3824, and TPS3828)
  • Supply current of 15 µA (typical)
  • 5-pin SOT-23 package
  • Temperature range: −40°C to 85°C (−40°C to 125°C for TPS3823A-33)

The TPS382x family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains less than the threshold voltage, VIT−. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage (VIT− + VHYS). When the supply voltage drops below the threshold voltage VIT−, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, VIT–, set by an internal voltage divider. The TPS382x family also offers watchdog time out options of 200 ms (TPS3820) and 1.6 s (TPS3823, TPS3824, and TPS3828).

The TPS382x family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage VDD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains less than the threshold voltage, VIT−. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage (VIT− + VHYS). When the supply voltage drops below the threshold voltage VIT−, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, VIT–, set by an internal voltage divider. The TPS382x family also offers watchdog time out options of 200 ms (TPS3820) and 1.6 s (TPS3823, TPS3824, and TPS3828).

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類型 標題 日期
* Data sheet TPS382x Voltage Monitor With Watchdog Timer datasheet (Rev. N) PDF | HTML 2022年 7月 13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
Application brief Latching a Voltage Supervisor (Reset IC) (Rev. A) 2019年 4月 5日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Disabling the Watchdog Timer for TI's Family of Supervisors 2003年 10月 30日

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開發板

TPS382-Q1EVM — 具有整合式看門狗的 TPS382x-Q1 電壓監控器評估模組

The TPS382-Q1EVM evaluation module (EVM) has five different TPS382x-Q1 devices to let you evaluate and test the different features of the product family.  The EVM includes devices with 2.5-V, 3-V, 3.3-V and 5-V fixed monitoring, watchdog input, manual reset, (...)
使用指南: PDF
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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 (...)
參考設計

TIDA-00929 — 用於捕捉電弧特徵的頻譜分析儀訊號調節和處理參考設計

此參考設計展示了頻寬最佳化類比前端 (AFE) 和即時 FIR 實作,使用低功率擷取任何波形中的寬頻頻譜。各訊號路徑中的運算放大器,是根據增益、訊號頻寬、低雜訊,以及在消耗低功率的同時接近軌擺幅需求來選擇。波形可在頻率和時域中,使用含內建向量數學引擎的混合訊號超低功率微處理器進行即時處理。
Design guide: PDF
電路圖: PDF
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  • 進行中持續性的可靠性監測
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