ZHCSS97H september   1998  – june 2023 LM2676

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 说明（续）
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics – 3.3-V Version
    6. 7.6  Electrical Characteristics – 5-V Version
    7. 7.7  Electrical Characteristics – 12-V Version
    8. 7.8  Electrical Characteristics – Adjustable Voltage Version
    9. 7.9  Electrical Characteristics – All Output Voltage Versions
    10. 7.10 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Adjustable Output Voltage
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Fixed Output Voltage Typical Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Custom Design with WEBENCH® Tools
          2. 9.2.1.2.2 Inductor Selection (L1)
          3. 9.2.1.2.3 Output Capacitor Selection (COUT)
          4. 9.2.1.2.4 Catch Diode Selection (D1)
          5. 9.2.1.2.5 Input Capacitor (CIN)
          6. 9.2.1.2.6 Boost Capacitor (CB)
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Adjustable Output Voltage Typical Application
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Programming Output Voltage
          2. 9.2.2.2.2 Inductor Selection (L1)
          3. 9.2.2.2.3 Output Capacitor Selection (COUT)
          4. 9.2.2.2.4 Catch Diode Selection (D1)
          5. 9.2.2.2.5 Input Capacitor (CIN)
          6. 9.2.2.2.6 Boost Capacitor (CB)
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Typical Application for All Output Voltage Versions
        1. 9.2.3.1 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 WSON Package Devices
      2. 9.4.2 Layout Examples
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 Custom Design with WEBENCH® Tools
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 接收文档更新通知
    4. 10.4 支持资源
    5. 10.5 Trademarks
    6. 10.6 静电放电警告
    7. 10.7 术语表
  12. 11Mechanical, 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
9.2.1.2.3 Output Capacitor Selection (COUT)

Select an output capacitor from the output capacitor Table 9-2. Using the output voltage and the inductance value found in the inductor selection guide, step 1, locate the appropriate capacitor value and voltage rating. Use the
5-V section in the output capacitor Table 9-2. Choose a capacitor value and voltage rating from the line that contains the inductance value of 47 μH. The capacitance and voltage rating values corresponding to the 47-μH inductor are the following:

  • Surface mount
    • 68-μF, 10-V Sprague 594D series
    • 100-μF, 10-V AVX TPS series
  • Through hole
    • 68-μF, 10-V Sanyo OS-CON SA series
    • 150-μF, 35-V Sanyo MV-GX series
    • 150-μF, 35-V Nichicon PL series
    • 150-μF, 35-V Panasonic HFQ series

The capacitor list contains through-hole electrolytic capacitors from four different capacitor manufacturers and surface-mount tantalum capacitors from two different capacitor manufacturers. TI recommends that both the manufacturers and the manufacturer's series that are listed in the table be used.

Table 9-2 Output Capacitor Table
OUTPUT
VOLTAGE
(V)		INDUCTANCE
(μH)		OUTPUT CAPACITOR
SURFACE MOUNTTHROUGH HOLE
SPRAGUE 594D SERIES (μF/V)AVX TPS SERIES (μF/V)SANYO OS-CON SA SERIES (μF/V)SANYO MV-GX SERIES (μF/V)NICHICON PL SERIES (μF/V)PANASONIC HFQ SERIES (μF/V)
3.322120/6.3100/10100/10330/35330/35330/35
33120/6.3100/1068/10220/35220/35220/35
4768/10100/1068/10150/35150/35150/35
68120/6.3100/10100/10120/35120/35120/35
100120/6.3100/10100/10120/35120/35120/35
150120/6.3100/10100/10120/35120/35120/35
522100/16100/10100/10330/35330/35330/35
3368/101001068/10220/35220/35220/35
4768/10100/1068/10150/35150/35150/35
68100/16100/10100/10120/35120/35120/35
100100/16100/10100/10120/35120/35120/35
150100/16100/10100/10120/35120/35120/35
1222120/20(2×) 68/2068/20330/35330/35330/35
3368/2568/2068/20220/35220/35220/35
4747/2068/2047/20150/35150/35150/35
6847/2068/2047/20120/35120/35120/35
10047/2068/2047/20120/35120/35120/35
15047/2068/2047/20120/35120/35120/35
22047/2068/2047/20120/35120/35120/35