ZHCS584B March   2011  – June 2019 LM21212-2

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化应用电路
  4. 4 修订历史记录
  5. 5 说明（续）
  6. 6 Pin Configuration and Functions
    1.     Pin Descriptions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Ratings
    4. 7.4 Electrical Characteristics
    5. 7.5 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Precision Enable
      2. 8.3.2 UVLO
      3. 8.3.3 Current Limit
      4. 8.3.4 Short-Circuit Protection
      5. 8.3.5 Thermal Protection
      6. 8.3.6 Power-Good Flag
      7. 8.3.7 Light Load Operation
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Typical Application 1
        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 Output Voltage
          3. 9.2.1.2.3 Precision Enable
          4. 9.2.1.2.4 Soft Start
          5. 9.2.1.2.5 Resistor-Adjustable Frequency
          6. 9.2.1.2.6 Inductor Selection
          7. 9.2.1.2.7 Output Capacitor Selection
          8. 9.2.1.2.8 Input Capacitor Selection
          9. 9.2.1.2.9 Control Loop Compensation
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Typical Application Schematic 2
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
  10. 10Layout
    1. 10.1 Layout Considerations
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 第三方产品免责声明
      2. 11.1.2 开发支持
        1. 11.1.2.1 使用 WEBENCH® 工具创建定制设计
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 Glossary
  12. 12机械、封装和可订购信息

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

9.2.1.1 Design Requirements

Table 1. Bill Of Materials (VIN = 3.3 V - 5.5 V, VOUT = 1.2 V, IOUT = 12 A, FSW = 500 kHz)

ID DESCRIPTION VENDOR PART NUMBER QUANTITY
CF CAP, CERM, 1 uF, 10V, +/-10%, X7R, 0603 MuRata GRM188R71A105KA61D 1
CIN1, CIN2, CIN3, CO1, CO2, CO3 CAP, CERM, 100 uF, 6.3V, +/-20%, X5R, 1206 MuRata GRM31CR60J107ME39L 6
CC1 CAP, CERM, 1800 pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H182J 1
CC2 CAP, CERM, 68 pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H680J 1
CC3 CAP, CERM, 820 pF, 50V, +/-5%, C0G/NP0, 0603 TDK C1608C0G1H821J 1
CSS CAP, CERM, 0.033 uF, 16V, +/-10%, X7R, 0603 MuRata GRM188R71C333KA01D 1
LO Inductor, Shielded Drum Core, Powdered Iron, 560nH, 27.5A, 0.0018 ohm, SMD Vishay-Dale IHLP4040DZERR56M01 1
RF RES, 1.0 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06031R00JNEA 1
RC1 RES, 9.31 kohm, 1%, 0.1W, 0603 Vishay-Dale CRCW06039K31FKEA 1
RC2 RES, 165 ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW0603165RFKEA 1
RFB1, RFB2, RPGOOD RES, 10 kohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060310K0FKEA 3
RADJ RES, 95.3 kohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060395K3FKEA 1