ZHCSO70A march   2023  – may 2023 LMR36501 , LMR36502

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD (Commercial) Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 System Characteristics
    7. 7.7 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Enable, Shutdown, and Start-up
      2. 8.3.2  Adjustable Switching Frequency (with RT)
      3. 8.3.3  Power-Good Output Operation
      4. 8.3.4  Internal LDO, VCC UVLO, and VOUT/FB Input
      5. 8.3.5  Bootstrap Voltage and VBOOT-UVLO (BOOT Terminal)
      6. 8.3.6  Output Voltage Selection
      7. 8.3.7  Soft Start and Recovery from Dropout
        1. 8.3.7.1 Soft Start
        2. 8.3.7.2 Recovery from Dropout
      8. 8.3.8  Current Limit and Short Circuit
      9. 8.3.9  Thermal Shutdown
      10. 8.3.10 Input Supply Current
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Active Mode
        1. 8.4.3.1 CCM Mode
        2. 8.4.3.2 AUTO Mode - Light Load Operation
          1. 8.4.3.2.1 Diode Emulation
          2. 8.4.3.2.2 Frequency Reduction
        3. 8.4.3.3 FPWM Mode - Light Load Operation
        4. 8.4.3.4 Minimum On-time Operation
        5. 8.4.3.5 Dropout
  10. 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  Choosing the Switching Frequency
        2. 9.2.2.2  Setting the Output Voltage
          1. 9.2.2.2.1 VOUT / FB for Adjustable Output
        3. 9.2.2.3  Inductor Selection
        4. 9.2.2.4  Output Capacitor Selection
        5. 9.2.2.5  Input Capacitor Selection
        6. 9.2.2.6  CBOOT
        7. 9.2.2.7  VCC
        8. 9.2.2.8  CFF Selection
        9. 9.2.2.9  External UVLO
        10. 9.2.2.10 Maximum Ambient Temperature
      3. 9.2.3 Application Curves
    3. 9.3 Best Design Practices
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
        1. 9.5.1.1 Ground and Thermal Considerations
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Device Nomenclature
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 接收文档更新通知
    4. 10.4 支持资源
    5. 10.5 Trademarks
    6. 10.6 静电放电警告
    7. 10.7 术语表
  12. 11Mechanical, 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

9.2.3 Application Curves

GUID-20221223-SS0I-PG27-VDLJ-QP3QGZKTVZFR-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
Figure 9-3 Efficiency
GUID-20221223-SS0I-XHMT-R7SP-HX52JC80BLX2-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
Figure 9-5 Dropout VIN High to Low
GUID-20221223-SS0I-SGFG-0Q90-XSJDHXZJRFGG-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 24 V 0 mA to 150 mA COUT = 2 × 22 μF
Figure 9-7 Load Transient
GUID-20221223-SS0I-2RVN-MPDC-9P9ZRGH9PSNG-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 24 V 150 mA COUT = 2 × 22 μF
Figure 9-9 Steady State Waveforms
GUID-20221223-SS0I-CTH7-QX9M-MZQCCC7KR2MG-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 24 V L = 15 μH COUT = 2 × 22 μF
Figure 9-11 Short Circuit Entry
GUID-20221223-SS0I-MDXB-RKMD-TGDQPGFBHWNK-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 36 V 150 mA COUT = 2 × 22 μF
Figure 9-13 Thermal Image
GUID-20221223-SS0I-XJ5Z-JHDN-QNKN8CPHHG6V-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
Figure 9-4 Line and Load Regulation
GUID-20221223-SS0I-QLMN-DVSK-C4CVDGMJZJ3W-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
Figure 9-6 Dropout VIN Low to High
GUID-20221223-SS0I-MBBJ-GXTB-ZV89K2FF7R7W-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 24 V 0 mA to 150 mA COUT = 2 × 22 μF
Figure 9-8 Load Transient
GUID-20221223-SS0I-NC57-LBC8-2CKFPB2CQTDR-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 24 V 150 mA COUT = 2 × 22 μF
Figure 9-10 Output Voltage Ripple
GUID-20221223-SS0I-CJKL-SFXW-RZ4GSMK3G4PX-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 24 V L = 15 μH COUT = 2 × 22 μF
Figure 9-12 Short Circuit Exit
GUID-20221223-SS0I-BJMF-DPCL-BXHH20VKRPXN-low.svg
LMR36502F3 VOUT = 3.3 V Fixed 1 MHz (FPWM)
VIN = 48 V 150 mA COUT = 2 × 22 μF
Figure 9-14 Thermal Image
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