ZHCSGY9B July   2017  – March 2018 LMS3655

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用电路
      2.      LMS3655 效率：输出电压 = 5V
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  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 Thermal Information (for Device Mounted on PCB)
    6. 7.6 Electrical Characteristics
    7. 7.7 System Characteristics
    8. 7.8 Timing Requirements
    9. 7.9 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
      1. 8.2.1 Control Scheme
    3. 8.3 Feature Description
      1. 8.3.1 RESET Flag Output
      2. 8.3.2 Enable and Start-Up
      3. 8.3.3 Soft-Start Function
      4. 8.3.4 Current Limit
      5. 8.3.5 Hiccup Mode
      6. 8.3.6 Synchronizing Input
      7. 8.3.7 Undervoltage Lockout (UVLO) and Thermal Shutdown (TSD)
      8. 8.3.8 Input Supply Current
    4. 8.4 Device Functional Modes
      1. 8.4.1 AUTO Mode
      2. 8.4.2 FPWM Mode
      3. 8.4.3 Dropout
      4. 8.4.4 Spread-Spectrum Operation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 General Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 External Components Selection
            1. 9.2.1.2.1.1 Input Capacitors
            2. 9.2.1.2.1.2 Output Inductors and Capacitors
              1. 9.2.1.2.1.2.1 Inductor Selection
              2. 9.2.1.2.1.2.2 Output Capacitor Selection
          2. 9.2.1.2.2 FB for Adjustable Output
          3. 9.2.1.2.3 VCC
          4. 9.2.1.2.4 BIAS
          5. 9.2.1.2.5 CBOOT
          6. 9.2.1.2.6 Maximum Ambient Temperature
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Adjustable 5-V Output
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Adjustable 3.3-V Output
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
        3. 9.2.3.3 Application Curves
      4. 9.2.4 6-V Adjustable Output
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
        3. 9.2.4.3 Application Curves
    3. 9.3 Do's and Don't's
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 器件支持
      1. 12.1.1 第三方产品免责声明
    2. 12.2 文档支持
      1. 12.2.1 相关文档
    3. 12.3 接收文档更新通知
    4. 12.4 社区资源
    5. 12.5 商标
    6. 12.6 静电放电警告
    7. 12.7 Glossary
  13. 13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

7.7 System Characteristics

The following specifications are ensured by design provided that the component values in the typical application circuit are used. These parameters are not ensured by production testing. Limits apply over the recommended operating junction temperature range of –40°C to +150°C, unless otherwise noted. Minimum and maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 13.5 V.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN-MIN Minimum input voltage for full functionality at 3.5-A load, after start-up. VOUT = 3.3 V +2% or –3% regulation 3.5 V
Minimum input voltage for full functionality at maximum rated load 5.5 A after start-up. VOUT = 3.3 V +2% or –3% regulation 3.8
VOUT Output voltage VIN = VOUT + 1 V to 36 V, IOUT = 3.5 A –2.25% 2.25%
FSW Switching frequency VIN = 24 V, FPWM = 24V, VOUT = 3.3 V, IOUT = 200 mA 400 kHz
IQ_VIN Input current to VIN pin VIN = 13.5 V, VOUT = 3.3 V, IOUT = 0 A , FPWM = 0, RFBT = 49.9 kΩ, RFBB = 21.7 kΩ 32 µA
VIN = 13.5 V, VOUT = 5.0 V, IOUT = 0 A, FPWM = 0, RFBT = 49.9 kΩ, RFBB = 12.4 kΩ 57
IB Bias current in AUTO mode at no load VIN = 13.5 V, IOUT = 0 A, FPWM = 0 32 42 µA
VDROP1 Minimum input to output voltage differential to maintain regulation accuracy without inductor DCR drop VOUT = 3.3 V or 5 V, IOUT= 3.5 A, +2% or –3% output accuracy 0.35 0.6 V
VOUT = 3.3 V or 5 V, IOUT= 5.5 A, +2% or –3% output accuracy 0.65 0.85 V
VDROP2 Minimum input to output voltage differential to maintain FSW ≥ 330 kHz without inductor DCR drop VOUT = 3.3 V or 5 V, IOUT = 3.5 A,
FSW = 330 kHz, 2% regulation accuracy		 0.5 0.7 V
VOUT = 3.3 V or 5 V, IOUT = 5.5 A,
FSW = 330 kHz, 2% regulation accuracy		 0.7 1.2 V
Efficiency Typical efficiency VIN = 13.5 V, VOUT = 5 V, IOUT = 3.5 A 94%
VIN = 13.5 V, VOUT = 3.3 V, IOUT = 3.5 A 92%
VIN = 13.5 V, VOUT = 5 V, IOUT = 100 mA 92%