JAJSLG9B March   2021  – November 2023 TPS3704-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Device Nomenclature
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 絶対最大定格
    2. 6.2 ESD 定格
    3. 6.3 推奨動作条件
    4. 6.4 Thermal Information
    5. 6.5 電気的特性
    6. 6.6 タイミング要件
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 VDD
      2. 7.3.2 SENSEx Input
        1. 7.3.2.1 Immunity to SENSEx Pins Voltage Transients
          1. 7.3.2.1.1 SENSEx Hysteresis
      3. 7.3.3 RESETx/RESETx
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation (VDD > VDD(MIN))
      2. 7.4.2 Undervoltage Lockout (VPOR < VDD < UVLO)
      3. 7.4.3 Power-On Reset (VDD < VPOR)
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Voltage Threshold Accuracy
      2. 8.1.2 Adjustable Voltage Thresholds
    2. 8.2 Typical Applications
      1. 8.2.1 Design 1: Multi-Rail Window Monitoring for Microcontroller Power Rails
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
      2. 8.2.2 Design 2: Manual Self-Test Option for Enhanced Functional Safety Use Cases
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Power Supply Guidelines
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Nomenclature
    2. 9.2 ドキュメントの更新通知を受け取る方法
    3. 9.3 サポート・リソース
    4. 9.4 Trademarks
    5. 9.5 静電気放電に関する注意事項
    6. 9.6 用語集
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.3.2 SENSEx Input

The SENSEx input can vary from 0 V to 6 V, regardless of the device supply voltage used. The SENSEx pins are used to monitor critical voltage rails or push-button inputs. If the voltage on this pin drops below VIT-(UV) or goes above VIT+(OV), then RESETx/RESETx is asserted. When the voltage on the SENSEx pin rises above the positive threshold voltage VIT-(UV) + VHYS or goes below the negative threshold voltage VIT+(OV) - VHYS,


RESETx/RESETx deasserts after the set RESETx/RESETx delay time. The internal comparators have built-in hysteresis to make sure well-defined RESETx/RESETx assertions and deassertions even when there are small changes on the voltage rail being monitored.

The TPS3704-Q1 combines comparators with a precision reference voltage and a trimmed resistor divider. This configuration optimizes device accuracy because all resistor tolerances are accounted for in the accuracy and performance specifications. The TPS3704-Q1 is relatively immune to short transients on the SENSEx pin. Although not required in most cases, for noisy applications, good analog design practice is to place a 10-nF to 100-nF bypass capacitor at the SENSEx inputs to reduce sensitivity to transient voltages on the monitored signals.