SNVSB12B November   2017  – May 2021 LM73605-Q1 , LM73606-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  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 Switching Characteristics
    8. 7.8 System Characteristics
    9. 7.9 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  Synchronous Step-Down Regulator
      2. 8.3.2  Auto Mode and FPWM Mode
      3. 8.3.3  Fixed-Frequency Peak Current-Mode Control
      4. 8.3.4  Adjustable Output Voltage
      5. 8.3.5  Enable and UVLO
      6. 8.3.6  Internal LDO, VCC_UVLO, and BIAS Input
      7. 8.3.7  Soft Start and Voltage Tracking
      8. 8.3.8  Adjustable Switching Frequency
      9. 8.3.9  Frequency Synchronization and Mode Setting
      10. 8.3.10 Internal Compensation and CFF
      11. 8.3.11 Bootstrap Capacitor and VBOOT-UVLO
      12. 8.3.12 Power-Good and Overvoltage Protection
      13. 8.3.13 Overcurrent and Short-Circuit Protection
      14. 8.3.14 Thermal Shutdown
    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 DCM Mode
        3. 8.4.3.3 PFM Mode
        4. 8.4.3.4 Fault Protection Mode
  9. 9 Layout
    1. 9.1 Layout Guidelines
      1. 9.1.1 Layout For EMI Reduction
      2. 9.1.2 Ground Plane
      3. 9.1.3 Optimize Thermal Performance
    2. 9.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
      2. 10.1.2 Development Support
        1. 10.1.2.1 Custom Design With WEBENCH® Tools
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Receiving Notification of Documentation Updates
    5. 10.5 Support Resources
    6. 10.6 Support Resources
    7. 10.7 Trademarks
    8. 10.8 Electrostatic Discharge Caution
    9. 10.9 Glossary

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.3 Application Curves

GUID-856DBBE0-6637-4F0A-8194-B04FE2D97E6E-low.gif
VOUT = 3.3 VfSW = 400 kHzAuto Mode
Figure 9-3 LM73606-Q1 Efficiency
GUID-AA107653-9DF9-4283-9046-C27F64B292F3-low.gif
VOUT = 3.3 VfSW = 500 kHzAuto Mode
Figure 9-5 LM73605-Q1 Efficiency
GUID-487C9F3E-2370-4319-B09F-73A1A41F2436-low.gif
VOUT = 3.3 VfSW = 2200 kHzAuto Mode
Figure 9-7 LM73605-Q1 Efficiency
GUID-5CDCCC0E-7B36-4B62-9F7B-FD40E4B23E9B-low.gif
VOUT = 3.3 VfSW = 350 kHzAuto Mode
Figure 9-9 LM73605-Q1 Efficiency
GUID-BB0B5858-2476-4A9E-B231-302C700B9956-low.gif
VOUT = 5 VfSW = 400 kHzAuto Mode
Figure 9-11 LM73606-Q1 Efficiency
GUID-A0C4F9F2-DCAF-4D20-8EB2-291B2BFFC02E-low.gif
VOUT = 5 VfSW = 500 kHzAuto Mode
Figure 9-13 LM73606-Q1 Efficiency
GUID-4805E924-C197-4ADB-AEEC-C794A4850AB4-low.gif
VOUT = 5 VfSW = 1000 kHzAuto Mode
Figure 9-15 LM73606-Q1 Efficiency
GUID-5EC27BEB-DE30-46AA-8B25-4E71B9281D29-low.gif
VOUT = 5 VfSW = 2200 kHzAuto Mode
Figure 9-17 LM73606-Q1 Efficiency
GUID-B57DBB3E-12EA-4243-870E-D1C813930B3A-low.gif
VOUT = 12 VfSW = 500 kHzAuto Mode
Figure 9-19 LM73605-Q1 Efficiency
GUID-299CC2C4-C646-49B4-A89E-C0B5DF96FAC7-low.gif
VOUT = 5 VfSW = 400 kHzAuto Mode
Figure 9-21 LM73606-Q1 Load and Line Regulation
GUID-881AE027-D5A5-401B-A645-0231EF7F13BD-low.gif
VOUT = 5 VfSW = 500 kHzAuto Mode
Figure 9-23 LM73606-Q1 Load and Line Regulation
GUID-0DCCFB66-9B90-485C-B416-1B1162A29285-low.gif
VOUT = 5 VfSW = 2200 kHzAuto Mode
Figure 9-25 LM73605-Q1 Load and Line Regulation
GUID-1506ED1D-9855-4645-A080-302E8769BF9C-low.gif
VOUT = 3.3 VfSW = 400 kHzAuto Mode
Figure 9-27 LM73606-Q1 Load and Line Regulation
GUID-4E3DE4B8-8A44-4925-845D-5A4CAD81DAD9-low.gif
VOUT = 3.3 VfSW = 2200 kHzAuto Mode
Figure 9-29 LM73605-Q1 Load and Line Regulation
GUID-35C93AA2-BD0E-47D8-8C61-4FDEB7FEDC62-low.gif
VOUT = 3.3 VfSW = 500 kHzAuto Mode
Figure 9-31 LM73605-Q1 Load and Line Regulation
GUID-E7220363-13B2-415C-8A0C-DCC86AE1AC01-low.gif
VOUT = 12 VfSW = 500 kHzAuto Mode
Figure 9-33 LM73605-Q1 Load and Line Regulation
GUID-A22441B3-66AC-4CE3-A238-DE1553141A14-low.gif
VOUT = 5 VfSW = 400 kHzAuto Mode
Figure 9-35 LM73606-Q1 Dropout Curve
GUID-65EBC444-84E8-40B7-A5CE-75361879A94F-low.gif
VOUT = 5 VfSW = 2200 kHzAuto Mode
Figure 9-37 LM73605-Q1 Dropout Curve
GUID-85434AED-86B9-4DBC-8704-D3009EB9F6DB-low.gif
VOUT = 5 VfSW = 500 kHzAuto Mode
Figure 9-39 LM73605-Q1 Dropout Curve
GUID-0D47D545-5937-4A43-B529-6CEA63ED0F07-low.gif
VOUT = 3.3 VfSW = 400 kHzAuto Mode
Figure 9-41 LM73606-Q1 Dropout Curve
GUID-DF03852C-ECCD-4A62-9DA7-08E4B6C9844D-low.gif
VOUT = 3.3 VfSW = 500 kHzAuto Mode
Figure 9-43 LM73605-Q1 Dropout Curve
GUID-6BEF185F-CDB5-4433-91BB-956656F62AA3-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 1 mAAuto Mode
Figure 9-45 LM73606-Q1 Switching Waveform and VOUT Ripple
GUID-38D91FA6-6DAE-4F09-9907-C9442B51236C-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 100 mAAuto Mode
Figure 9-47 LM73606-Q1 Switching Waveform and VOUT Ripple
GUID-21F03970-2F90-4728-923C-E7E066F9E806-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 6 AAuto Mode
Figure 9-49 LM73606-Q1 Switching Waveform and VOUT Ripple
GUID-82F133C7-2224-41EB-8198-D86ECA5A3F74-low.gif
VIN = 12 VVOUT set at 3.3 VfSW set at 500 kHz
IOUT = 7.5 AVOUT droops to 2 V
Figure 9-51 LM73606-Q1 Overcurrent Behavior
GUID-2BF12D14-C771-42B3-95D2-CA35C5AD959C-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT= 200 mAFPWM Mode
Figure 9-53 LM73606-Q1 Soft Start With 200-mA Load in FPWM Mode
GUID-98FC9D9F-5521-4949-AE51-C34689F9C70A-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 5 AAuto Mode
Figure 9-55 LM73606-Q1 Soft Start With 5-A Load
GUID-F0C441F8-BD24-4451-9639-98D8A198B22B-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 10 mA to 6 A to 10 mAAuto Mode
Figure 9-57 LM73606-Q1 Load Transients
GUID-524AA45C-D485-4353-B910-82672F1086F2-low.gif
VIN = 12 VVOUT = 5 VfSW = 2200 kHz
IOUT = 10 mA to 5 A to 10 mAAuto Mode
Figure 9-59 LM73605-Q1 Load Transients
GUID-03637FF4-E90E-4768-A7C5-010EE659F442-low.gif
IOUT = 100 mAVOUT = 3.3 VfSW = 500 kHz
VIN = 10 V to 35 V to 10 VAuto Mode
Figure 9-61 LM73606-Q1 Line Transients
GUID-4D5A2A45-ED1A-440A-B3F6-3A277A36CAF1-low.gif
VIN = 12 V VOUT = 5 V IOUT = 4 A
fSW = 400 kHz Tested on LM73606EVM-5V-400k
CFLT = 4 × 4.7 µF LIN = 1 µH CBULK = 10 µF
Figure 9-63 LM73606-Q1 Conducted EMI Result versus CISPR25 Limits - Low Frequency
GUID-81BD5C0E-483A-4999-A9CE-F4007EDC582A-low.gif
VIN = 13.5 V VOUT = 5 V IOUT = 3.5 A
fSW = 2.2 MHz Tested on LM73605EVM-5V-2MHZ
CFLT = 3 × 2.2 µF LIN = 0.6 µH CBULK = 10 µF
CM Choke = ACM1211-102-2PL-TL01 CCHOKE = 2 × 2.2 µF
Figure 9-65 LM73606-Q1 Conducted EMI Result versus CISPR25 Limits - Low Frequency
GUID-28A1EEB2-D637-4223-A3D6-D391B16608E2-low.gif
VIN = 13.5 V VOUT = 5 V IOUT = 5 A
fSW = 400 kHz Tested on LM73606EVM-5V-400k
CFLT = 3 × 2.2 µF LIN = 1 µH CBULK = 10 µF
Figure 9-67 LM73606-Q1 Radiated EMI Result versus CISPR25 Limits - Low Frequency
GUID-07FD08C1-F510-4BB2-A9C2-91B1F6DB973A-low.gif
VIN = 13.5 VVOUT = 5 VIOUT = 3 A
fSW = 2200 kHzTested on LM73605EVM-5V-2MHZ
CFLT = 3 × 2.2 µFLIN = 0.6 µHCBULK = 10 µF
CM Choke = ACM1211-102-2PL-TL01CCHOKE = 2 × 2.2 µF
Figure 9-69 LM73606-Q1 Radiated EMI Result versus CISPR25 Limits - Low Frequency
GUID-4D405B64-4B2A-414B-9B67-6D60788A4734-low.gif
VOUT = 3.3 VfSW = 400 kHzFPWM Mode
Figure 9-4 LM73606-Q1 Efficiency
GUID-0D17C0DA-95A6-4702-87F5-59802D194D47-low.gif
VOUT = 3.3 VfSW = 500 kHzFPWM Mode
Figure 9-6 LM73605-Q1 Efficiency
GUID-C47A60EE-D578-4FBF-8025-AB20B383B984-low.gif
VOUT = 3.3 VfSW = 2200 kHzFPWM Mode
Figure 9-8 LM73605-Q1 Efficiency
GUID-A754B28D-1D0C-4A77-A728-991122151C3C-low.gif
VOUT = 3.3 VfSW = 1000 kHzAuto Mode
Figure 9-10 LM73605-Q1 Efficiency
GUID-4E8F741D-6AC5-4257-8AC6-72BFDF1503ED-low.gif
VOUT = 5 VfSW = 400 kHzFPWM Mode
Figure 9-12 LM73606-Q1 Efficiency
GUID-C68516EF-B045-47CB-AC57-96AA768FF0DB-low.gif
VOUT = 5 VfSW = 500 kHzFPWM Mode
Figure 9-14 LM73606-Q1 Efficiency
GUID-EA9BFDF0-80EB-493D-BFE0-048B4832FE17-low.gif
VOUT = 5 VfSW = 1000 kHzFPWM Mode
Figure 9-16 LM73606-Q1 Efficiency
GUID-910638EA-D835-4348-A34F-2F6E365C8CE6-low.gif
VOUT = 5 VfSW = 2200 kHzFPWM Mode
Figure 9-18 LM73606-Q1 Efficiency
GUID-82DE6DE3-A1DD-4D87-8922-7744B11A59AB-low.gif
VOUT = 12 VfSW = 500 kHzFPWM Mode
Figure 9-20 LM73605-Q1 Efficiency
GUID-5FDE772A-E3C1-4CFE-8967-77BB302E76B2-low.gif
VOUT = 5 VfSW = 400 kHzFPWM Mode
Figure 9-22 LM73606-Q1 Load and Line Regulation
GUID-DDBB5F1D-EBE9-44D2-871F-EEE3967B7496-low.gif
VOUT = 5 VfSW = 500 kHzFPWM Mode
Figure 9-24 LM73606-Q1 Load and Line Regulation
GUID-78F8A34C-2C72-468C-AEF5-8C1AB8D51BD9-low.gif
VOUT = 5 VfSW = 2200 kHzFPWM Mode
Figure 9-26 LM73605-Q1 Load and Line Regulation
GUID-A8DC039C-9056-40EC-B833-2F0A8B92FAA9-low.gif
VOUT = 3.3 VfSW = 400 kHzFPWM Mode
Figure 9-28 LM73606-Q1 Load and Line Regulation
GUID-87AFAE24-F8F8-437A-BCB4-0100A7B55ED8-low.gif
VOUT = 3.3 VfSW = 2200 kHzFPWM Mode
Figure 9-30 LM73605-Q1 Load and Line Regulation
GUID-43259840-BC1E-4F90-99FF-C1DF26AC93F4-low.gif
VOUT = 3.3 VfSW = 1000 kHzAuto Mode
Figure 9-32 LM73605-Q1 Load and Line Regulation
GUID-6D0D239E-1B3A-49B7-8297-797CA53196CE-low.gif
VOUT = 12 VfSW = 500 kHzFPWM Mode
Figure 9-34 LM73605-Q1 Load and Line Regulation
GUID-F6A027AA-714F-4498-8D76-68A9E6DC42E7-low.gif
VOUT = 5 VfSW = 400 kHzFPWM Mode
Figure 9-36 LM73606-Q1 Dropout Curve
GUID-E7BCA470-2B33-4862-9F72-14D1B9CBC1C1-low.gif
VOUT = 5 VfSW = 2200 kHzFPWM Mode
Figure 9-38 LM73605-Q1 Dropout Curve
GUID-2BB827BB-CE38-42B8-857C-C2B4D39B0167-low.gif
VOUT = 5 VfSW = 1000 kHzAuto Mode
Figure 9-40 LM73605-Q1 Dropout Curve
GUID-BD5DC5A7-3361-4FC6-B8D4-1C7D1CC9A2F2-low.gif
VOUT = 3.3 VfSW = 400 kHzFPWM Mode
Figure 9-42 LM73606-Q1 Dropout Curve
GUID-B0CEFBC3-E4D4-4D04-8793-677C5469A5BC-low.gif
VOUT = 12 VfSW = 500 kHzAuto Mode
Figure 9-44 LM73605-Q1 Dropout Curve
GUID-2F4B5ADC-EB29-422A-9D8C-C973CA38FA15-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 1 mAFPWM Mode
Figure 9-46 LM73606-Q1 Switching Waveform and VOUT Ripple
GUID-1DB21001-1B9E-4459-BA00-513D9D8F8782-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 100 mAFPWM Mode
Figure 9-48 LM73606-Q1 Switching Waveform and VOUT Ripple
GUID-20FA1E7F-A705-418A-A414-002F916FD096-low.gif
VIN = 3.66 VVOUT = 3.3 VfSW set at 500 kHz
IOUT = 3 AAuto Mode
Figure 9-50 LM73606-Q1 Switching Waveform at Dropout
GUID-C541A5E9-6EFE-4BC2-9A85-AC302B67C8E5-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
Figure 9-52 LM73606-Q1 Short-Circuit Hiccup Protection and Recovery
GUID-4EAA95B4-DB65-47AF-A5D0-92D43E2566A8-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT= 200 mAAuto Mode
Figure 9-54 LM73606-Q1 Soft Start With 200-mA Load in Auto Mode
GUID-C6B7B0CA-3D2E-43C2-A7C6-407E8419D694-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
VPRE-BIAS= 1.5 VAuto Mode
Figure 9-56 LM73606-Q1 Soft Start With Pre-Biased Output Voltage
GUID-D86C9582-662D-4162-8E00-BCD64DED26B9-low.gif
VIN = 12 VVOUT = 3.3 VfSW = 500 kHz
IOUT = 10 mA to 6 A to 10 mAFPWM Mode
Figure 9-58 LM73606-Q1 Load Transients
GUID-BC739067-8E94-4A70-A7FD-5FB568FC812E-low.gif
VIN = 12 VVOUT = 5 VfSW = 2200 kHz
IOUT = 10 mA to 5 A to 10 mAFPWM Mode
Figure 9-60 LM73605-Q1 Load Transients
GUID-61414C0E-C545-4F09-B67F-D77CD831AF31-low.gif
IOUT = 2 AVOUT = 3.3 VfSW = 500 kHz
VIN = 10 V to 35 V to 10 VAuto Mode
Figure 9-62 LM73606-Q1 Line Transients
GUID-6134F96B-E535-41CC-9D70-72E96192AD15-low.gif
VIN = 12 V VOUT = 5 V IOUT = 4 A
fSW = 400 kHz Tested on LM73606EVM-5V-400k
CFLT = 4 × 4.7 µF LIN = 1 µH CBULK = 10 µF
Figure 9-64 LM73606-Q1 Conducted EMI Result versus CISPR25 Limits - High Frequency
GUID-B0EE6DB0-7C43-47C6-AFC6-C3C4E09FC9F1-low.gif
VIN = 13.5 V VOUT = 5 V IOUT = 3.5 A
fSW = 2.2 MHz Tested on LM73605EVM-5V-2MHZ
CFLT = 3 × 2.2 µF LIN = 0.6 µH CBULK = 10 µF
CM Choke = ACM1211-102-2PL-TL01 CCHOKE = 2 × 2.2 µF
Figure 9-66 LM73606-Q1 Conducted EMI Result versus CISPR25 Limits - High Frequency
GUID-DE68D9F3-9561-4BE6-98BE-FEDFD2D2BE86-low.gif
VIN = 13.5 V VOUT = 5 V IOUT = 5 A
fSW = 400 kHz Tested on LM73606EVM-5V-400k
CFLT = 3 × 2.2 µF LIN = 1 µH CBULK = 10 µF
Figure 9-68 LM73606-Q1 Radiated EMI Result versus CISPR25 Limits - High Frequency
GUID-E27C2E7D-77BB-47F1-B8AC-03E00C43F97A-low.gif
VIN = 13.5 VVOUT = 5 VIOUT = 3 A
fSW = 2200 kHzTested on LM73605EVM-5V-2MHZ
CFLT = 3 × 2.2 µFLIN = 0.6 µHCBULK = 10 µF
CM Choke = ACM1211-102-2PL-TL01CCHOKE = 2 × 2.2 µF
Figure 9-70 LM73606-Q1 Radiated EMI Result versus CISPR25 Limits - High Frequency