ZHCSJU8G February   2011  – March 2022 LM21215

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Ratings
    4. 6.4 Electrical Characteristics
    5. 6.5 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 Precision Enable
      2. 7.3.2 UVLO
      3. 7.3.3 Current Limit
      4. 7.3.4 Short-Circuit Protection
      5. 7.3.5 Thermal Protection
      6. 7.3.6 Light Load Operation
      7. 7.3.7 Power Good Flag
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Typical Application 1
        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 Output Voltage
          3. 8.2.1.2.3 Precision Enable
          4. 8.2.1.2.4 Soft Start
          5. 8.2.1.2.5 Inductor Selection
          6. 8.2.1.2.6 Output Capacitor Selection
          7. 8.2.1.2.7 Input Capacitor Selection
          8. 8.2.1.2.8 Programmable Current Limit
          9. 8.2.1.2.9 Control Loop Compensation
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Typical Application Schematic 2
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
  9. 9 Layout
    1. 9.1 Layout Considerations
    2. 9.2 Layout Example
      1. 9.2.1 Thermal Considerations
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 第三方产品免责声明
      2. 10.1.2 Development Support
        1. 10.1.2.1 Custom Design With WEBENCH® Tools
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 术语表
  11. 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

8.2.1.1 Design Requirements

Table 8-1 Bill Of Materials (VIN = 3.3 V–5.5 V, VOUT = 1.2 V, IOUT = 15 A)
IDDESCRIPTIONVENDORPART NUMBERQUANTITY
CFCAP, CERM, 1 μF, 10 V, ±10%, X7R, 0603MuRataGRM188R71A105KA61D1
CIN1, CIN2, CIN3, CO1, CO2, CO3CAP, CERM, 100 μF, 6.3 V, ±20%, X5R, 1206MuRataGRM31CR60J107ME39L6
CC1CAP, CERM, 1800 pF, 50 V, ±5%, C0G/NP0, 0603TDKC1608C0G1H182J1
CC2CAP, CERM, 68 pF, 50 V, ±5%, C0G/NP0, 0603TDKC1608C0G1H680J1
CC3CAP, CERM, 820 pF, 50 V, ±5%, C0G/NP0, 0603TDKC1608C0G1H821J1
CSSCAP, CERM, 0.033 μF, 16 V, ±10%, X7R, 0603MuRataGRM188R71C333KA01D1
LOInductor, Shielded Drum Core, Powdered Iron, 560 nH, 27.5 A, 0.0018 Ω, SMDVishay-DaleIHLP4040DZERR56M011
RFRES, 1.0 Ω, 5%, 0.1 W, 0603Vishay-DaleCRCW06031R00JNEA1
RC1RES, 9.31 kΩ, 1%, 0.1 W, 0603Vishay-DaleCRCW06039K31FKEA1
RC2RES, 165 Ω, 1%, 0.1 W, 0603Vishay-DaleCRCW0603165RFKEA1
RFB1, RFB2, RPGOODRES, 10 kΩ, 1%, 0.1 W, 0603Vishay-DaleCRCW060310K0FKEA3
RILIMRES, 7.15 kΩ, 1%, 0.1 W, 0603Vishay-DaleCRCW06037K15FKEA1