ZHCSKX9D May   2019  – July 2022 LM61460

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.     ESD Ratings
    3. 7.2 Recommended Operating Conditions
    4. 7.3 Thermal Information
    5. 7.4 Electrical Characteristics
    6. 7.5 Timing Characteristics
    7. 7.6 Systems Characteristics
    8. 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  EN/SYNC Uses for Enable and VIN UVLO
      2. 8.3.2  EN/SYNC Pin Uses for Synchronization
      3. 8.3.3  Clock Locking
      4. 8.3.4  Adjustable Switching Frequency
      5. 8.3.5  PGOOD Output Operation
      6. 8.3.6  Internal LDO, VCC UVLO, and BIAS Input
      7. 8.3.7  Bootstrap Voltage and VCBOOT-UVLO (CBOOT Pin)
      8. 8.3.8  Adjustable SW Node Slew Rate
      9. 8.3.9  Spread Spectrum
      10. 8.3.10 Soft Start and Recovery From Dropout
      11. 8.3.11 Output Voltage Setting
      12. 8.3.12 Overcurrent and Short Circuit Protection
      13. 8.3.13 Thermal Shutdown
      14. 8.3.14 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 (High Input Voltage) Operation
        5. 8.4.3.5 Dropout
  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  Choosing the Switching Frequency
        2. 9.2.2.2  Setting the Output Voltage
        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  BOOT Capacitor
        7. 9.2.2.7  BOOT Resistor
        8. 9.2.2.8  VCC
        9. 9.2.2.9  BIAS
        10. 9.2.2.10 CFF and RFF Selection
        11. 9.2.2.11 External UVLO
      3. 9.2.3 Application Curves
      4. 9.2.4 USB Type-C System Example
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
        3. 9.2.4.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Ground and Thermal Considerations
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  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

9.2.3 Application Curves

GUID-F9C68715-3AFB-4283-A114-6F90AECCD21D-low.gif
VOUT = 3.3 V FSW = 400 kHz Auto Mode
Figure 9-5 LM61460 Efficiency
GUID-0CDC6ABB-5649-4CE0-AFD5-467B21E22766-low.gif
VOUT = 3.3 V FSW = 1000 kHz Auto mode
Figure 9-7 LM61460 Efficiency
GUID-41C83CC1-BAA5-43B0-B20D-27870F67CFB7-low.gif
VOUT = 3.3 V FSW = 2100 kHz Auto mode
Figure 9-9 LM61460 Efficiency
GUID-A4F8B061-DAFF-44D1-BF17-EC7F9C716F18-low.gif
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 9-11 LM61460 Efficiency
GUID-99B3B864-332E-480F-BD12-45109317CEF6-low.gif
VOUT = 5 V FSW = 1000 kHz Auto mode
Figure 9-13 LM61460 Efficiency
GUID-B8D3BF4A-67EA-4D74-AD7A-E4E96EE6375F-low.gif
VOUT = 5 V FSW = 2100 kHz Auto mode
Figure 9-15 LM61460 Efficiency
GUID-49A8B68E-D2A7-4818-8DF2-16D08A48D8DB-low.gif
VOUT = 3.3 V FSW = 400 kHz Auto Mode
Figure 9-17 LM61460 Load and Line Regulation
GUID-473B505A-8F70-4B66-9360-CF01C59174BD-low.gif
VOUT = 3.3 V FSW = 1000 kHz Auto mode
Figure 9-19 LM61460 Load and Line Regulation
GUID-44889586-48AA-440C-9388-82055EDAAAAE-low.gif
VOUT = 3.3 V FSW = 2100 kHz Auto mode
Figure 9-21 LM61460 Load and Line Regulation
GUID-CDF85840-8283-4FBF-A572-8CEDAD3F6780-low.gif
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 9-23 LM61460 Load and Line Regulation
GUID-B26AB478-3ADF-4901-BA79-9925DA0FF9B0-low.gif
VOUT = 5 V FSW = 1000 kHz Auto mode
Figure 9-25 LM61460 Load and Line Regulation
GUID-E2246C8A-3A24-48B3-95FE-5F1A1BB360B4-low.gif
VOUT = 5 V FSW = 2100 kHz Auto mode
Figure 9-27 LM61460 Load and Line Regulation
GUID-D02F2FE6-34E1-43D3-B704-B040E4FCE455-low.gif
VOUT = 3.3 V FSW = 400 kHz Auto mode
Figure 9-29 LM61460 Dropout Curve
GUID-248040D5-054E-4400-B4EB-126460F78FFE-low.gif
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 9-31 Dropout Curve
GUID-481CE63C-9B41-4011-8307-5878984C2D2D-low.gif
VOUT = 3.3 V FSW = 400 kHz Auto mode
Figure 9-33 LM61460 Frequency Dropout
GUID-6ABB667F-B1ED-429F-A7B0-D2D97F711648-low.gif
VOUT = 5 V FSW = 400 kHz Auto mode
Figure 9-35 LM61460 Frequency Dropout Curve
GUID-F81DC974-E2B5-4165-BC79-497F2EFC3755-low.gif
VOUT = 5 V FSW = 2100 kHz Auto mode
IOUT = 50 mA VIN = 13.5 V
Figure 9-37 LM61460 Switching Waveform and VOUT Ripple
GUID-446DE865-5091-49FE-A59C-A19B257DA52D-low.gif
VOUT = 5 V FSW = 2100 kHz Auto mode
IOUT = 50 mA VIN = 13.5 V
Figure 9-39 LM61460 Start-up with 50-mA Load
GUID-0CE3E275-CF3E-4D9C-9C0E-8D0535EC565D-low.gif
VOUT = 3.3 V FSW = 2100 kHz FPWM mode
IOUT = 3.25 A VIN = 13.5 V
Figure 9-41 LM61460 Start-up with 3.25-A
GUID-8EBA46DB-1CEE-47D2-A22A-6F2748148A41-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = Short Circuit to 5 A VIN = 13.5 V
Figure 9-43 LM61460 Short Circuit Recovery
GUID-287B4C5C-731C-4CF5-8E2B-52801109D680-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 4 A VIN = 13.5 V to 4 V to 13.5 V
Figure 9-45 Graceful Recovery from Dropout
GUID-48C59BAA-6A85-49A5-829E-B7ABF0B4149F-low.gif
VOUT = 5 V FSW = 400 kHz FPWM mode
IOUT = 0 A to 6 A to 0 A VIN = 13.5 V TR = TF = 6 µs
Figure 9-47 LM61460 Load Transient
GUID-DC36844D-6B8E-4235-A710-286E91E84612-low.gif
VOUT = 5 V FSW = 400 kHz Auto mode
IOUT = 50 mA to 6 A to 50 mA VIN = 13.5 V TR = TF = 6 µs
Figure 9-49 LM61460 Load Transient
GUID-EBE83123-CA62-4D37-A2BE-C43BD7F04DB3-low.gif
VOUT = 3.3 V FSW = 400 kHz Auto mode
IOUT = 2 A to 4 A to 2 A VIN = 13.5 V TR = TF = 2 µs
Figure 9-51 LM61460 Load Transient
GUID-D791E6E7-CEB7-488A-A133-CEB53FE197B6-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 0 A to 6 A to 0 A VIN = 13.5 V TR = TF = 6 µs
Figure 9-53 LM61460 Load Transient
GUID-3BD2316C-E9FB-41E3-8DE0-E2DA065E05D5-low.gif
VOUT = 5 V FSW = 400 kHz IOUT = 5 A
Frequency Tested: 30 MHz to 108 MHz
Figure 9-55 Conducted EMI versus CISPR25 Limits (Yellow: Peak Signal, Blue: Average Signal)
GUID-1D7A6209-F6C1-4496-8A7C-B21D9CE642BC-low.gif
VOUT = 5 V FSW = 400 kHz IOUT = 5 A
Frequency Tested: 30 MHz to 300 MHz
Figure 9-57 Radiated EMI Bicon Vertical versus CISPR25 Limits
GUID-8D76EC0F-745D-4523-81AF-F72F7F366502-low.gif
VOUT = 5 V FSW = 400 kHz IOUT = 5 A
Frequency Tested: 300 MHz to 1 GHz
Figure 9-59 Radiated EMI Log Vertical versus CISPR25 Limits
GUID-3C8048EF-029D-46C3-B54D-E78FA1461C51-low.gif
 
 
 
 
FSW = 400 kHz Note: Measurements taken with LM61460EVM
Figure 9-61 Recommended Input EMI Filter
GUID-0479AFBA-C335-40AE-A4C0-E087BF11A1B3-low.gif
FSW = 2100 kHz VOUT = 5 V IOUT = 5 A
Frequency Tested: 30 MHz to 108 MHz
Figure 9-63 Conducted EMI versus CISPR25 Limits (Yellow: Peak Signal, Blue: Average Signal)
GUID-D1669238-AE73-4D67-9733-BDC7ED61869B-low.gif
VOUT = 3.3 V FSW = 400 kHz FPWM mode
Figure 9-6 LM61460 Efficiency
GUID-BD13E079-F9B3-4068-BF6B-8D2FBD5FF20E-low.gif
VOUT = 3.3 V FSW = 1000 kHz FPWM mode
Figure 9-8 LM61460 Efficiency
GUID-5760F717-E53E-408D-A2D2-263954FBA1B6-low.gif
VOUT = 3.3 V FSW = 2100 kHz FPWM mode
Figure 9-10 LM61460 Efficiency
GUID-F421AA2F-5E08-4B73-A0C2-0BDFBDA68AE2-low.gif
VOUT = 5 V FSW = 400 kHz FPWM mode
Figure 9-12 LM61460 Efficiency
GUID-BADA671B-4254-4F09-8602-C8A4207DC74B-low.gif
VOUT = 5 V FSW = 1000 kHz FPWM mode
Figure 9-14 LM61460 Efficiency
GUID-9A5806DB-C967-4829-865E-E52FE729CB1E-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
Figure 9-16 LM61460 Efficiency
GUID-30548AF7-435E-44F9-A731-C3EC31672880-low.gif
VOUT = 3.3 V FSW = 400 kHz FPWM mode
Figure 9-18 LM61460 Load and Line Regulation
GUID-66FA85D7-34CD-4CCC-842B-6E4958391735-low.gif
VOUT = 3.3 V FSW = 1000 kHz FPWM mode
Figure 9-20 LM61460 Load and Line Regulation
GUID-708BA71D-79EE-4E1C-8F75-7B0012E7CEAD-low.gif
VOUT = 3.3 V FSW = 2100 kHz FPWM mode
Figure 9-22 LM61460 Load and Line Regulation
GUID-B243806C-426C-4970-BF63-C034E41B21EF-low.gif
VOUT = 5 V FSW = 400 kHz FPWM mode
Figure 9-24 LM61460 Load and Line Regulation
GUID-4A1C9A0C-EF4D-4272-8982-0EAEE2E54DF0-low.gif
VOUT = 5 V FSW = 1000 kHz FPWM mode
Figure 9-26 LM61460 Load and Line Regulation
GUID-EDF0CAE7-8A07-465E-BB17-E29BC9803DB3-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
Figure 9-28 LM61460 Load and Line Regulation
GUID-98C1AA68-0F1B-44E4-ACFB-E042327D0720-low.gif
VOUT = 3.3 V FSW = 2100 kHz Auto mode
Figure 9-30 LM61460 Dropout Curve
GUID-C71D974A-94A0-4C90-9F5D-7EE76307F9F2-low.gif
VOUT = 5 V FSW = 2100 kHz Auto mode
Figure 9-32 LM61460 Dropout Curve
GUID-D0D8E8E2-C736-4371-8FDB-04EAEA630688-low.gif
VOUT = 3.3 V FSW = 2100 kHz Auto mode
Figure 9-34 LM61460 Frequency Dropout Curve
GUID-C414D320-FA0E-4A5D-A17F-843CF38EB5D1-low.gif
VOUT = 5 V FSW = 2100 kHz Auto mode
Figure 9-36 LM61460 Frequency Dropout Curve
GUID-791E6825-64DF-43B9-A033-14E7C1D87396-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 50 mA VIN = 13.5 V
Figure 9-38 LM61460 Switching Waveform and VOUT Ripple
GUID-8025D31C-9D11-4EBC-A72E-B7347E3FDA43-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 50 mA VIN = 13.5 V
Figure 9-40 LM61460 Start-up with 50-mA
GUID-87F2A470-2FF1-4CC1-895E-27A8892A8925-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = 5 A to Short Circuit VIN = 13.5 V
Figure 9-42 LM61460 Short Circuit Protection
GUID-3D234A28-4EAB-4257-8D1E-0DC46EF0B40B-low.gif
VOUT = 5 V FSW = 2100 kHz FPWM mode
IOUT = Short Circuit VIN = 13.5 V
Figure 9-44 LM61460 Short Circuit Performance
GUID-E28801DA-57A6-42DF-A9D2-6D79810D0757-low.gif
VOUT = 5 V FSW = 400 kHz Auto mode
IOUT = 0 A to 6 A to 0 A VIN = 13.5 V TR = TF = 6 µs
Figure 9-46 LM61460 Load Transient
GUID-19AA0704-CD10-4466-997D-4E6271F23097-low.gif
VOUT = 5 V FSW = 400 kHz Auto mode
IOUT = 2 A to 5 A to 2 A VIN = 13.5 V TR = TF = 3 µs
Figure 9-48 LM61460 Load Transient
GUID-6203CC53-456A-4C6B-9439-833AB3D9368F-low.gif
VOUT = 3.3 V FSW = 400 kHz Auto mode
IOUT = 0 A to 6 A to 0 A VIN = 13.5 V TR = TF = 6 µs
Figure 9-50 LM61460 Load Transient
GUID-B3C85E53-ECE6-42BD-86E4-09561E19A8B3-low.gif
VOUT = 5 V FSW = 2100 kHz Auto mode
IOUT = 0 A to 6 A to 0 A VIN = 13.5 V TR = TF = 6 µs
Figure 9-52 LM61460 Load Transient
GUID-1EE635E2-EEB5-4B50-937A-2173F496EE7D-low.gif
FSW = 400 kHz VOUT = 5 V IOUT = 5 A
Frequency Tested: 150 kHz to 30 MHz
Figure 9-54 Conducted EMI versus CISPR25 Limits (Yellow: Peak Signal, Blue: Average Signal)
GUID-7D161623-8B8D-4399-BFEF-CB9F120E5B61-low.gif
VOUT = 5 V FSW = 400 kHz IOUT = 5 A
Frequency Tested: 150 kHz to 30 MHz
Figure 9-56 Radiated EMI Rod versus CISPR25 Limits
GUID-1D7A6209-F6C1-4496-8A7C-B21D9CE642BC-low.gif
VOUT = 5 V FSW = 400 kHz IOUT = 5 A
Frequency Tested: 30 MHz to 300 MHz
Figure 9-58 Radiated EMI Bicon Horizontal versus CISPR25 Limits
GUID-14EE1B7E-005E-4227-B91F-8A076F11A9FA-low.gif
VOUT = 5 V FSW = 400 kHz IOUT = 5 A
Frequency Tested: 300 MHz to 1 GHz
Figure 9-60 Radiated EMI Log Horizontal versus CISPR25 Limits
GUID-2377F28C-138C-4189-BCDC-0C68CA319D26-low.gif
FSW = 2100 kHz VOUT = 5 V IOUT = 5 A
Frequency Tested: 150 kHz to 30 MHz
Figure 9-62 Conducted EMI versus CISPR25 Limits (Yellow: Peak Signal, Blue: Average Signal)
GUID-9F56B465-DC78-4972-86E6-89213C3A96E9-low.gif
FSW = 2100 kHz
Figure 9-64 Recommended Input EMI Filter
Table 9-5 BOM for Typical Application Curves
VOUT FREQUENCY RFBB RT COUT CIN + CHF L CFF
3.3 V 400 kHz 43.2 kΩ 33.2 kΩ 6 × 22 µF 2 × 4.7 µF + 2 × 100 nF 4.7 µH (XHMI6060) 22 pF
3.3 V 1000 kHz 43.2 kΩ 13 kΩ 3 × 22 µF 2 × 4.7 µF + 2 × 100 nF 2.2 µH (744-393-440-22) 22 pF
3.3 V 2100 kHz 43.2 kΩ 6.04 kΩ 3 × 22 µF 2 × 4.7 µF + 2 × 100 nF 1 µH (XEL5030) 22 pF
5 V 400 kHz 24.9 kΩ 33.2 kΩ 4 × 22 µF 2 × 4.7 µF + 2 × 100 nF 4.7 µH (XHMI6060) 22 pF
5 V 1000 kHz 24.9 kΩ 13 kΩ 3 × 22 µF 2 × 4.7 µF + 2 × 100 nF 2.2 µH (744-393-440-22) 22 pF
5 V 2100 kHz 24.9 kΩ 6.04 kΩ 3 × 22 µF 2 × 4.7 µF + 2 × 100 nF 1 µH (XEL5030) 22 pF
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