ZHCSHA3D NOVEMBER   2009  – March 2018 TPS40303 , TPS40304 , TPS40305

PRODUCTION DATA.  

1. 1 特性
2. 2 應用
3. 3 說明
   1.     Device Images
      1.      簡化應用示意圖
4. 4 修訂歷史記錄
5. 5 Pin Configuration and Functions
   1.     Pin Functions
6. 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 Typical Characteristics
7. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Feature Description
      1. 7.3.1 Voltage Reference
      2. 7.3.2 Enable Functionality, Start-Up Sequence and Timing
      3. 7.3.3 Soft-Start Time
      4. 7.3.4 Oscillator and Frequency Spread Spectrum (FSS)
      5. 7.3.5 Overcurrent Protection
      6. 7.3.6 Drivers
      7. 7.3.7 Prebias Start-Up
      8. 7.3.8 Power Good
      9. 7.3.9 Thermal Shutdown
   4. 7.4 Device Functional Modes
      1. 7.4.1 Modes of Operation
         1. 7.4.1.1 UVLO
         2. 7.4.1.2 Disable
         3. 7.4.1.3 Calibration
         4. 7.4.1.4 Converting
8. 8 Application and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Applications
      1. 8.2.1 Using the TPS40305 for a 12-V to 1.8-V Point-of-Load Synchronous Buck Regulator
         1. 8.2.1.1 Design Requirements
         2. 8.2.1.2 Detailed Design Procedure
            1. 8.2.1.2.1  Custom Design With WEBENCH® Tools
            2. 8.2.1.2.2  Selecting the Switching Frequency
            3. 8.2.1.2.3  Inductor Selection (L1)
            4. 8.2.1.2.4  Output Capacitor Selection (C12)
            5. 8.2.1.2.5  Peak Current Rating of Inductor
            6. 8.2.1.2.6  Input Capacitor Selection (C8)
            7. 8.2.1.2.7  MOSFET Switch Selection (Q1 and Q2)
            8. 8.2.1.2.8  Bootstrap Capacitor (C6)
            9. 8.2.1.2.9  VDD Bypass Capacitor (C7)
            10. 8.2.1.2.10 BP Bypass Capacitor (C5)
            11. 8.2.1.2.11 Short-Circuit Protection (R11)
            12. 8.2.1.2.12 Feedback Divider (R4, R5)
            13. 8.2.1.2.13 Compensation: (C2, C3, C4, R3, R6)
         3. 8.2.1.3 Application Curves
      2. 8.2.2 A High-Current, Low-Voltage Design Using the TPS40304
         1. 8.2.2.1 Design Requirements
         2. 8.2.2.2 Detailed Design Procedure
            1. 8.2.2.2.1  Selecting the Switching Frequency
            2. 8.2.2.2.2  Inductor Selection (L1)
            3. 8.2.2.2.3  Output Capacitor Selection (C12)
            4. 8.2.2.2.4  Peak Current Rating of Inductor
            5. 8.2.2.2.5  Input Capacitor Selection (C8)
            6. 8.2.2.2.6  MOSFET Switch Selection (Q1 and Q2)
            7. 8.2.2.2.7  Bootstrap Capacitor (C6)
            8. 8.2.2.2.8  VDD Bypass Capacitor (C7)
            9. 8.2.2.2.9  BP Bypass Capacitor (C5)
            10. 8.2.2.2.10 Short-Circuit Protection (R11)
            11. 8.2.2.2.11 Feedback Divider (R4, R5)
            12. 8.2.2.2.12 Compensation: (C2, C3, C4, R3, R6)
         3. 8.2.2.3 Application Curves
      3. 8.2.3 A Synchronous Buck Application Using the TPS40303
         1. 8.2.3.1 Design Requirements
         2. 8.2.3.2 Detailed Design Procedure
            1. 8.2.3.2.1  Selecting the Switching Frequency
            2. 8.2.3.2.2  Inductor Selection (L1)
            3. 8.2.3.2.3  Output Capacitor Selection (C12)
            4. 8.2.3.2.4  Peak Current Rating of Inductor
            5. 8.2.3.2.5  Input Capacitor Selection (C8)
            6. 8.2.3.2.6  MOSFET Switch Selection (Q1 and Q2)
            7. 8.2.3.2.7  Bootstrap Capacitor (C6)
            8. 8.2.3.2.8  VDD Bypass Capacitor (C7)
            9. 8.2.3.2.9  BP Bypass Capacitor (C5)
            10. 8.2.3.2.10 Short-Circuit Protection (R11)
            11. 8.2.3.2.11 Feedback Divider (R4, R5)
            12. 8.2.3.2.12 Compensation: (C2, C3, C4, R3, R6)
         3. 8.2.3.3 Application Curves
9. 9 Power Supply Recommendations
10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
11. 11器件和文檔支持
    1. 11.1 器件支持
       1. 11.1.1 第三方產品免責聲明
    2. 11.2 使用 WEBENCH® 工具創建定制設計
    3. 11.3 文檔支持
       1. 11.3.1 相關文檔
    4. 11.4 相關鏈接
    5. 11.5 接收文檔更新通知
    6. 11.6 社區資源
    7. 11.7 商標
    8. 11.8 靜電放電警告
    9. 11.9 Glossary
12. 12機械、封裝和可訂購信息