ZHCSHQ3F August   2017  – November 2020 LMR33630

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and 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 Electrical Characteristics
    6. 7.6 Timing Characteristics
    7. 7.7 System Characteristics
    8. 7.8 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 Power-Good Flag Output
      2. 8.3.2 Enable and Start-up
      3. 8.3.3 Current Limit and Short Circuit
      4. 8.3.4 Undervoltage Lockout and Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Auto Mode
      2. 8.4.2 Dropout
      3. 8.4.3 Minimum Switch On-Time
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Custom Design With WEBENCH® Tools
        2. 9.2.2.2  Choosing the Switching Frequency
        3. 9.2.2.3  Setting the Output Voltage
        4. 9.2.2.4  Inductor Selection
        5. 9.2.2.5  Output Capacitor Selection
        6. 9.2.2.6  Input Capacitor Selection
        7. 9.2.2.7  CBOOT
        8. 9.2.2.8  VCC
        9. 9.2.2.9  CFF Selection
        10. 9.2.2.10 External UVLO
        11. 9.2.2.11 Maximum Ambient Temperature
      3. 9.2.3 Application Curves
    3. 9.3 What to Do and What Not to Do
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Ground and Thermal Considerations
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Custom Design With WEBENCH® Tools
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 接收文档更新通知
    4. 11.4 支持资源
    5. 11.5 Trademarks
    6. 11.6 静电放电警告
    7. 11.7 术语表

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • RNX|12
  • DDA|8
散热焊盘机械数据 (封装 | 引脚)
订购信息

9.2.3 Application Curves

Unless otherwise specified the following conditions apply: VIN = 12 V, TA = 25°C. The circuit is shown in Figure 9-31, with the appropriate BOM from Table 9-3 or Table 9-4.

GUID-8A94E6CC-E6E3-43BD-9B6A-7BEEDFAEFFED-low.png
VOUT = 5 V400 kHzDDA Package
Figure 9-7 Efficiency
GUID-2CE63F77-B8C7-4038-965F-32A66C417E13-low.png
VOUT = 5 V1.4 MHzDDA Package
Figure 9-9 Efficiency
GUID-17A593FD-40F9-4162-B1D2-18CEFCE8191C-low.png
VOUT = 5 V 2.1 MHz DDA Package
Figure 9-11 Efficiency
GUID-457D77B7-50C0-4098-9634-DBC47ED528FD-low.png
VOUT = 5 V 400 kHz RNX Package
Figure 9-13 Efficiency
GUID-4922136F-E8CC-4A62-99C6-BC7C40A63B0D-low.png
VOUT = 5 V 1.4 MHz RNX Package
Figure 9-15 Efficiency
GUID-6B60B1D4-2A1C-4D2A-B2A5-DC062A2D12D1-low.png
VOUT = 5 V 2.1 MHz RNX Package
Figure 9-17 Efficiency
GUID-D8B83E21-88BC-4B77-9900-662CEB79A9F2-low.png
VOUT = 5 V
Figure 9-19 Line and Load Regulation
GUID-A83924C1-C78F-4C24-ACF2-5EF10DF23B5A-low.png
VOUT = 5 V ƒSW = 400 kHz
Figure 9-21 Mode Change Thresholds
GUID-DFF74624-3395-4BBA-9FF7-13C06E56E6F1-low.gif
VIN = 12 V VOUT = 5 V
tf = tr = 2 µs IOUT = 0 A to 3 A
Figure 9-23 Load Transient
GUID-BBEC3FB0-0FCA-4189-8273-A1E8B7D41170-low.png
VOUT = 3.3 V
Figure 9-25 Line and Load Regulation
GUID-9B47A068-29B3-4E5F-BC27-8BDB2379C478-low.png
VOUT = 3.3 V ƒSW = 400 kHz
Figure 9-27 Mode Change Thresholds
GUID-BA87D34E-B9D9-4F50-8E1A-A41AD3595119-low.gif
VIN = 12 V VOUT = 3.3 V
tf = tr = 2 µs IOUT = 0 A to 3 A
Figure 9-29 Load Transient
GUID-D1A52481-F166-47F3-AA80-C09B965A6554-low.png
VOUT = 3.3 V400 kHzDDA Package
Figure 9-8 Efficiency
GUID-AC937FBC-0E77-4418-9F4E-6526381EE08A-low.png
VOUT = 3.3 V1.4 MHzDDA Package
Figure 9-10 Efficiency
GUID-D49EB713-622B-4543-890D-E50538BDBC75-low.png
VOUT = 3.3 V 2.1 MHz DDA Package
Figure 9-12 Efficiency
GUID-43652BA2-1DA8-49FF-8BC6-DEC6C8EDE882-low.png
VOUT = 3.3 V 400 kHz RNX Package
Figure 9-14 Efficiency
GUID-4E6C72A4-2D3A-4293-91A4-49DAD5CB9C9A-low.png
VOUT = 3.3 V 1.4 MHz RNX Package
Figure 9-16 Efficiency
GUID-EA1D3DF9-3A55-400A-AE94-39B24AE433D4-low.png
VOUT = 3.3 V 2.1 MHz RNX Package
Figure 9-18 Efficiency
GUID-49275FDC-3154-4426-A4E9-3FCB1125CD7B-low.png
VOUT = 5 V IOUT = 0 A RFBT = 1 MΩ
Figure 9-20 Input Supply Current
GUID-4B03D47B-048B-4D97-A87E-6FF9ECB5C19D-low.png
VOUT = 5 V ƒSW = 400 kHz
Figure 9-22 Switching Frequency versus Output Current
GUID-BFA865B0-FA00-47F4-A2D2-BA6171D3D1EC-low.gif
VIN = 12 V VOUT = 5 V
tf = tr = 2 µs IOUT = 1 A to 3 A
Figure 9-24 Load Transient
GUID-741AE52B-2A48-416F-84CE-171E12AF6F22-low.png
VOUT = 3.3 V IOUT = 0 A RFBT = 1 MΩ
Figure 9-26 Input Supply Current
GUID-C95F2C7A-E827-415B-9958-6A0A49BDFC02-low.png
VOUT = 3.3 V ƒSW = 400 kHz
Figure 9-28 Switching Frequency versus Output Current
GUID-368EE9B6-6BD3-42C5-B4B3-E88DC6D29175-low.gif
VIN = 12 V VOUT = 3.3V IOUT = 1 A to 3 A
tf = tr = 2 µs
Figure 9-30 Load Transient
GUID-10219432-3939-46B7-8D90-8CBE0FFA1229-low.gifFigure 9-31 Circuit for Application Curves

The values in this table were selected to enhance certain performance criteria and may not represent typical values.

Table 9-3 BOM for Typical Application Curves DDA Package
VOUTFREQUENCYRFBBCOUTCIN + CHFLU1
3.3 V400 kHz43.3 kΩ4 × 22 µF1 × 10 µF + 1 × 220 nF6.8 µH, 14 mΩ LMR33630ADDA
3.3 V1400 KHz43.3 kΩ4 × 22 µF1 × 10 µF + 1 × 220 nF2.2 µH, 11.4 mΩLMR33630BDDA
3.3 V2100 kHz43.3 kΩ4 × 22 µF1 × 10 µF + 1 × 220 nF1.2 µH, 16 mΩLMR33630CDDA
5 V400 kHz24.9 kΩ4 × 22 µF1 × 10 µF + 1 × 220 nF8 µH, 14 mΩ LMR33630ADDA
5 V1400 KHz24.9 kΩ4 × 22 µF1 × 10 µF + 1 × 220 nF2.2 µH, 11.4 mΩLMR33630BDDA
5 V2100 kHz24.9 kΩ4 × 22 µF1 × 10 µF + 1 × 220 nF1.5 µH, 8.2 mΩLMR33630CDDA
Table 9-4 BOM for Typical Application Curves RNX Package
VOUTFREQUENCYRFBBCOUTCIN + CHFLU1
3.3 V400 kHz43.3 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF6.8 µH, 14 mΩ LMR33630ARNX
3.3 V1400 KHz43.3 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF2.2 µH, 11.4 mΩLMR33630BRNX
3.3 V2100 kHz43.3 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF1.2 µH, 7 mΩLMR33630CRNX
5 V400 kHz24.9 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF8 µH, 25 mΩ LMR33630ARNX
5 V1400 KHz24.9 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF2.2 µH, 11.4 mΩLMR33630BRNX
5 V2100 kHz24.9 kΩ4 × 22 µF2 × 4.7 µF + 2 × 100 nF1.5 µH, 8.2 mΩ LMR33630CRNX