ZHCSIY8C October   2018  – June 2021 LM5143-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 说明（续）
  6. 6 Pin Configuration and Functions
    1. 6.1 Wettable Flanks
  7. 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
    6. 7.6 Switching Characteristics
    7. 7.7 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  Input Voltage Range (VIN)
      2. 8.3.2  High-Voltage Bias Supply Regulator (VCC, VCCX, VDDA)
      3. 8.3.3  Enable (EN1, EN2)
      4. 8.3.4  Power Good Monitor (PG1, PG2)
      5. 8.3.5  Switching Frequency (RT)
      6. 8.3.6  Clock Synchronization (DEMB)
      7. 8.3.7  Synchronization Out (SYNCOUT)
      8. 8.3.8  Spread Spectrum Frequency Modulation (DITH)
      9. 8.3.9  Configurable Soft Start (SS1, SS2)
      10. 8.3.10 Output Voltage Setpoint (FB1, FB2)
      11. 8.3.11 Minimum Controllable On-Time
      12. 8.3.12 Error Amplifier and PWM Comparator (FB1, FB2, COMP1, COMP2)
      13. 8.3.13 Slope Compensation
      14. 8.3.14 Inductor Current Sense (CS1, VOUT1, CS2, VOUT2)
        1. 8.3.14.1 Shunt Current Sensing
        2. 8.3.14.2 Inductor DCR Current Sensing
      15. 8.3.15 Hiccup Mode Current Limiting (RES)
      16. 8.3.16 High-Side and Low-Side Gate Drivers (HO1/2, LO1/2, HOL1/2, LOL1/2)
      17. 8.3.17 Output Configurations (MODE, FB2)
        1. 8.3.17.1 Independent Dual-Output Operation
        2. 8.3.17.2 Single-Output Interleaved Operation
        3. 8.3.17.3 Single-Output Multiphase Operation
    4. 8.4 Device Functional Modes
      1. 8.4.1 Standby Modes
      2. 8.4.2 Diode Emulation Mode
      3. 8.4.3 Thermal Shutdown
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Power Train Components
        1. 9.1.1.1 Buck Inductor
        2. 9.1.1.2 Output Capacitors
        3. 9.1.1.3 Input Capacitors
        4. 9.1.1.4 Power MOSFETs
        5. 9.1.1.5 EMI Filter
      2. 9.1.2 Error Amplifier and Compensation
    2. 9.2 Typical Applications
      1. 9.2.1 Design 1 – High Efficiency, Dual-Output Buck Regulator for Automotive Applications
        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 Custom Design With Excel Quickstart Tool
          3. 9.2.1.2.3 Inductor Calculation
          4. 9.2.1.2.4 Current-Sense Resistance
          5. 9.2.1.2.5 Output Capacitors
          6. 9.2.1.2.6 Input Capacitors
          7. 9.2.1.2.7 Compensation Components
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Design 2 – Two-Phase, Single-Output Buck Regulator for Automotive ADAS Applications
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedures
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Power Stage Layout
      2. 11.1.2 Gate-Drive Layout
      3. 11.1.3 PWM Controller Layout
      4. 11.1.4 Thermal Design and Layout
      5. 11.1.5 Ground Plane Design
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方米6体育平台手机版_好二三四免责声明
      2. 12.1.2 Development Support
      3. 12.1.3 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
        1. 12.2.1.1 PCB Layout Resources
        2. 12.2.1.2 Thermal Design Resources
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, 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

7.7 Typical Characteristics

VIN = VEN1 = VEN2 = 12 V, TJ = 25°C, unless otherwise stated.

GUID-73448E55-F720-4A06-99D9-607827BAFF25-low.gif
See Figure 9-4VOUT = 5 VFSW = 2.1 MHz
Figure 7-1 Efficiency versus Load
GUID-BCEB7450-98E6-4F7E-83EA-FEE35C2ECEDA-low.gifFigure 7-3 Switch Node Voltages
GUID-2E43799C-E0E1-4A7D-8B67-4EFCC0F393DF-low.gifFigure 7-5 Load Transient Response
GUID-A727B4B0-E5C5-46C7-B578-7628B705783A-low.gif
VEN1 = VEN2 = 0 V
Figure 7-7 Shutdown Current versus Input Voltage
GUID-5E4E1453-2C84-48B6-A51E-B7189CD0DF7A-low.gifFigure 7-9 ULIQ Mode Standby Current versus Temperature
GUID-C5AD6EA5-3076-496A-BB80-B0440FEB10C0-low.gifFigure 7-11 Fixed 5-V Output Voltage (VOUT1) versus Temperature
GUID-F0B8F1B4-21E5-4AD7-96EE-C04C6E7636F0-low.gifFigure 7-13 PG UV Thresholds versus Temperature
GUID-DB55DC8F-53F1-4507-8842-F79DCAC47F77-low.gifFigure 7-15 VCC Regulation Voltage versus Temperature
GUID-3549A06A-833F-4075-A0F0-F7C8E80BAC7B-low.gifFigure 7-17 VCC Current Limit versus Temperature
GUID-3283A7EF-850E-4281-8235-470C3C0662DD-low.gifFigure 7-19 VDDA UVLO Thresholds versus Temperature
GUID-065589B9-1C76-4B18-ACAA-79BD65D7D3C6-low.gifFigure 7-21 VCCX Switch Resistance versus Temperature
GUID-2D8021A2-3B85-4CC4-9F3D-B56C04037871-low.gifFigure 7-23 Current Sense (CS1) Amplifier Gain versus Temperature
GUID-3C445573-B48D-4DCD-B8B0-59BDB455E268-low.gifFigure 7-25 BOOT (HB1) UVLO Thresholds versus Temperature
GUID-7AB7F717-CD22-415D-92CA-47EB94707116-low.gifFigure 7-27 RT Resistance versus Switching Frequency
GUID-48141EA4-3177-4EFD-95EC-C6CECAFB8526-low.gif
See Figure 9-4VOUT = 3.3 VFSW = 2.1 MHz
Figure 7-2 Efficiency versus Load
GUID-0608BA9C-E4C7-4928-BE26-C2968DE8C29E-low.gifFigure 7-4 Start-up Characteristic
GUID-1F0BAB5B-E800-4E21-9190-ADBC35F98949-low.gif
VEN1 = VEN2 = 0 V
Figure 7-6 Shutdown Current versus Temperature
GUID-D79CB201-5423-4093-81EA-8B4AA155B946-low.gif
VEN2 = 0 V
Figure 7-8 Channel 1 Standby Current versus Temperature
GUID-EE511190-C2C0-420C-BC07-8756AAFED7E4-low.gifFigure 7-10 Fixed 3.3-V Output Voltage (VOUT1) versus Temperature
GUID-3B4650F5-AC1F-4096-ACB1-82716FE681E1-low.gifFigure 7-12 Feedback Voltage versus Temperature
GUID-92968645-9E8A-4CAD-9585-D866B577C24B-low.gifFigure 7-14 PG OV Thresholds versus Temperature
GUID-E62B2B6B-1B1C-47B5-92F2-67CE55B871A4-low.gifFigure 7-16 VCC UVLO Thresholds versus Temperature
GUID-C551048B-3EDB-423C-88CB-679104EC5ECA-low.gifFigure 7-18 VDDA Regulation Voltage versus Temperature
GUID-BC3404D9-4B75-428F-BC4B-97F17FBDD1AC-low.gifFigure 7-20 VCCX On/Off Thresholds versus Temperature
GUID-C4045119-29BB-4DB4-B45B-5F72EFEA2D87-low.gifFigure 7-22 Current Sense (CS1) Threshold versus Temperature
GUID-EDC255F8-5C65-44DD-A9C9-5496F77D5692-low.gifFigure 7-24 Minimum On Time and Off Time (HO1) versus Temperature
GUID-0015002F-D0E9-4BB3-BD84-DA6E0032BE3B-low.gifFigure 7-26 Soft-start (SS1) Current versus Temperature
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