ZHCSIX0H March   2009  – October 2018 LM5008A

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用，基本降压稳压器
  4. 4 修订历史记录
  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 Switching Characteristics
    7. 6.7 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 Control Circuit Overview
      2. 7.3.2 Start-Up Regulator (VCC)
      3. 7.3.3 Regulation Comparator
      4. 7.3.4 Overvoltage Comparator
      5. 7.3.5 On-Time Generator and Shutdown
      6. 7.3.6 Current Limit
      7. 7.3.7 N-Channel Buck Switch and Driver
      8. 7.3.8 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Selection Of External Components
        3. 8.2.2.3 Low-Output Ripple Configurations
      3. 8.2.3 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 使用 WEBENCH® 工具创建定制设计
      3. 11.1.3 开发支持
    2. 11.2 文档支持
      1. 11.2.1 相关文档
        1. 11.2.1.1 PCB 布局资源
        2. 11.2.1.2 热设计资源
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 术语表
  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

8.2.1 Design Requirements

A guide for determining the component values is shown in Figure 10. Table 1 lists the bill of materials for this application example. The following steps configure the LM5008A:

  • Input voltage range (VIN): 12 V to 95 V
  • Output voltage (VOUT1): 10 V
  • Load current (for continuous conduction mode): 100 mA to 300 mA

Table 1. Bill of Materials

ITEM DESCRIPTION PART NUMBER VALUE
C1 Ceramic Capacitor TDK C4532X7R2A105M 1 µF, 100 V
C2 Ceramic Capacitor TDK C4532X7R1E226M 22 µF, 25 V
C3 Ceramic Capacitor Kemet C1206C474K5RAC 0.47 µF, 50 V
C4 Ceramic Capacitor Kemet C1206C103K5RAC 0.01 µF, 50 V
C5 Ceramic Capacitor TDK C3216X7R2A104M 0.1 µF, 100 V
D1 Schottky Power Diode Diodes Inc. DFLS1100 100 V, 1 A
L1 Power Inductor COILTRONICS DR125-221-R or
TDK SLF10145T-221MR65		 220 µH
RFB2 Resistor Vishay CRCW12063011F 3.01 kΩ
RFB1 Resistor Vishay CRCW12061001F 1.0 kΩ
R3 Resistor Vishay CRCW12063R00F 3.0 Ω
RT Resistor Vishay CRCW12063243F 324 kΩ
RCL Resistor Vishay CRCW12063323F 332 kΩ
U1 Switching Regulator LM5008A