ZHCSFP1A November   2016  – September 2021 TPS3851

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 RESET
      2. 7.3.2 Manual Reset MR
      3. 7.3.3 UV Fault Detection
      4. 7.3.4 Watchdog Mode
        1. 7.3.4.1 CWD
        2. 7.3.4.2 Watchdog Input WDI
        3. 7.3.4.3 Watchdog Output WDO
        4. 7.3.4.4 SET1
    4. 7.4 Device Functional Modes
      1. 7.4.1 VDD is Below VPOR ( VDD < VPOR)
      2. 7.4.2 Above Power-On-Reset, But Less Than VDD(min) (VPOR ≤ VDD < VDD(min))
      3. 7.4.3 Normal Operation (VDD ≥ VDD(min))
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 CWD Functionality
        1. 8.1.1.1 Factory-Programmed Timing Options
        2. 8.1.1.2 Adjustable Capacitor Timing
      2. 8.1.2 Overdrive Voltage
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Monitoring the 1.8-V Rail
        2. 8.2.2.2 Calculating RESET and WDO Pullup Resistor
        3. 8.2.2.3 Setting the Watchdog
        4. 8.2.2.4 Watchdog Disabled During Initialization Period
      3. 8.2.3 Glitch Immunity
      4. 8.2.4 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 接收文档更新通知
    4. 11.4 支持资源
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 术语表
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

说明

TPS3851 完美结合了高精度电压监控器和可编程看门狗定时器。TPS3851 比较器在 VDD 引脚上可实现 0.8% 的精度
(–40°C 至 +125°C),针对欠压 (VITN) 阈值。TPS3851 还包含与欠压阈值相关的高精度迟滞,因此成为了紧容差系统的理想之选。该监控器的 RESET 延迟具备 15% 精度、高精密延迟时间。

TPS3851 包含可编程窗口看门狗计时器,广泛适用于各种应用。专用看门狗输出 (WDO) 有助于提高分辨率,从而帮助确定出现故障情况的根本原因。看门狗超时可通过外部电容编程,也可以采用工厂编程的默认延迟设置。可通过逻辑引脚禁用看门狗,避免在开发过程中出现意外的看门狗超时。

TPS3851 采用小型 3.00mm × 3.00mm 8 引脚 VSON 封装。

器件信息
器件型号 封装 (1) 封装尺寸(标称值)
TPS3851 VSON (8) 3.00mm × 3.00mm
如需了解所有可用封装,请参阅数据表末尾的可订购米6体育平台手机版_好二三四附录。
GUID-E15FD24A-2AE7-44D6-A29A-08D5C581CC30-low.gif全集成微控制器监控电路
GUID-98A16D2E-6E03-43AB-9647-9F017EDE04D7-low.gif欠压阈值 (VITN) 精度与温度间的关系