SLUS930D April   2011  – November  2016 TPS40400

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Dissipation Ratings
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Voltage Setting
      2. 7.3.2 Input Voltage Feedforward
      3. 7.3.3 Output Current Limit and Warning
      4. 7.3.4 Linear Regulators
      5. 7.3.5 PMBus Address
      6. 7.3.6 PMBus Connections
      7. 7.3.7 PMBus Functionality and Additional Set-Up
        1. 7.3.7.1  Data Format
        2. 7.3.7.2  Output Voltage Adjustment
        3. 7.3.7.3  Overcurrent Threshold
        4. 7.3.7.4  Output Current Reading
        5. 7.3.7.5  Soft-Start Time
        6. 7.3.7.6  Power Good
        7. 7.3.7.7  Undervoltage Lockout (UVLO)
        8. 7.3.7.8  Output Overvoltage and Undervoltage Thresholds
        9. 7.3.7.9  Programmable Fault Responses
        10. 7.3.7.10 User Data and Adjustable Anti-Cross-Conduction Delay
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuous Conduction Mode
      2. 7.4.2 Operation with CNTL Signal Control
      3. 7.4.3 Operation with OPERATION Control
      4. 7.4.4 Operation with CNTL and OPERATION Control
      5. 7.4.5 Operation without CNTL or OPERATION Control
      6. 7.4.6 Operation with Output Trim and Margin
    5. 7.5 Programming
      1. 7.5.1 Supported PMBus Commands
    6. 7.6 Register Maps
      1. 7.6.1  OPERATION (01h)
        1. 7.6.1.1 On
        2. 7.6.1.2 Margin
      2. 7.6.2  ON_OFF_CONFIG (02h)
        1. 7.6.2.1 Pu
        2. 7.6.2.2 Cmd
        3. 7.6.2.3 Cpr
        4. 7.6.2.4 Pol
        5. 7.6.2.5 Cpa
      3. 7.6.3  CLEAR_FAULTS (03h)
      4. 7.6.4  WRITE_PROTECT (10h)
      5. 7.6.5  STORE_DEFAULT_ALL (11h)
      6. 7.6.6  RESTORE_DEFAULT_ALL (12h)
      7. 7.6.7  STORE_DEFAULT_CODE (13h)
      8. 7.6.8  RESTORE_DEFAULT_CODE (14h)
      9. 7.6.9  VOUT_MODE (20h)
        1. 7.6.9.1 Mode
        2. 7.6.9.2 Exponent
      10. 7.6.10 VOUT_TRIM (22h)
      11. 7.6.11 VOUT_MARGIN_HIGH (25h)
      12. 7.6.12 VOUT_MARGIN_LOW (26h)
      13. 7.6.13 VOUT_SCALE_LOOP (29h)
        1. 7.6.13.1 Exponent
        2. 7.6.13.2 Mantissa
      14. 7.6.14 FREQUENCY_SWITCH (33h)
        1. 7.6.14.1 Exponent
        2. 7.6.14.2 Mantissa
      15. 7.6.15 VIN_ON (35h)
        1. 7.6.15.1 Exponent
        2. 7.6.15.2 Mantissa
      16. 7.6.16 VIN_OFF (36h)
        1. 7.6.16.1 Exponent
        2. 7.6.16.2 Mantissa
      17. 7.6.17 IOUT_CAL_GAIN (38h)
        1. 7.6.17.1 Exponent
        2. 7.6.17.2 Mantissa
      18. 7.6.18 IOUT_CAL_OFFSET (39h)
        1. 7.6.18.1 Exponent
        2. 7.6.18.2 Mantissa
      19. 7.6.19 VOUT_OV_FAULT_LIMIT (40h)
      20. 7.6.20 VOUT_OV_FAULT_RESPONSE (41h)
        1. 7.6.20.1 RSP[1:0]
        2. 7.6.20.2 RS[2:0]
      21. 7.6.21 VOUT_UV_FAULT_LIMIT (44h)
      22. 7.6.22 VOUT_UV_FAULT_RESPONSE (45h)
        1. 7.6.22.1 RSP[1:0]
        2. 7.6.22.2 RS[2:0]
      23. 7.6.23 IOUT_OC_FAULT_LIMIT (46h)
        1. 7.6.23.1 Exponent
        2. 7.6.23.2 Mantissa
      24. 7.6.24 IOUT_OC_FAULT_RESPONSE (47h)
        1. 7.6.24.1 RSP[1:0]
        2. 7.6.24.2 RS[2:0]
      25. 7.6.25 IOUT_OC_WARN_LIMIT (4Ah)
        1. 7.6.25.1 Exponent
        2. 7.6.25.2 Mantissa
      26. 7.6.26 OT_FAULT_RESPONSE (50h)
        1. 7.6.26.1 OTF_RS
      27. 7.6.27 POWER_GOOD_ON (5Eh)
      28. 7.6.28 POWER_GOOD_OFF (5Fh)
      29. 7.6.29 TON_RISE (61h)
        1. 7.6.29.1 Exponent
        2. 7.6.29.2 Mantissa
      30. 7.6.30 STATUS_BYTE (78h)
      31. 7.6.31 STATUS_WORD (78h)
      32. 7.6.32 STATUS_VOUT (7Ah)
      33. 7.6.33 STATUS_IOUT (7Bh)
      34. 7.6.34 STATUS_TEMPERATURE (7Dh)
      35. 7.6.35 STATUS_CML (7Eh)
      36. 7.6.36 READ_VIN (88h)
        1. 7.6.36.1 Exponent
        2. 7.6.36.2 Mantissa
      37. 7.6.37 READ_VOUT (8Bh)
        1. 7.6.37.1 Exponent
        2. 7.6.37.2 Mantissa
      38. 7.6.38 READ_IOUT (8Ch)
        1. 7.6.38.1 Exponent
        2. 7.6.38.2 Mantissa
      39. 7.6.39 PMBUS_REVISION (98h)
      40. 7.6.40 MFR_VIN_MIN (A0h)
        1. 7.6.40.1 Exponent
        2. 7.6.40.2 Mantissa
      41. 7.6.41 MFR_VIN_MAX (A1h)
        1. 7.6.41.1 Exponent
        2. 7.6.41.2 Mantissa
      42. 7.6.42 MFR_VOUT_MIN (A4h)
        1. 7.6.42.1 Exponent
        2. 7.6.42.2 Mantissa
      43. 7.6.43 MFR_VOUT_MAX (A5h)
        1. 7.6.43.1 Exponent
        2. 7.6.43.2 Mantissa
      44. 7.6.44 MFR_SPECIFIC_00 (D0h)
        1. 7.6.44.1 Dead-Time Control Setting (DTC)
        2. 7.6.44.2 WPE
      45. 7.6.45 MFR_SPECIFIC_01 (D1h)
      46. 7.6.46 MFR_SPECIFIC_02 (D2h)
      47. 7.6.47 MFR_SPECIFIC_03 (D3h)
      48. 7.6.48 MFR_SPECIFIC_04 (D4h)
      49. 7.6.49 MFR_SPECIFIC_05 (D5h)
      50. 7.6.50 MFR_SPECIFIC_06 (D6h)
      51. 7.6.51 MFR_SPECIFIC_07 (D7h)
      52. 7.6.52 MFR_SPECIFIC_44 (FCh)
        1. 7.6.52.1 Identifier Code
        2. 7.6.52.2 Revision Code
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 TPS40400 12-V Input, 1.2-V Output, 20-A (maximum) Output Current ConverterAdded Design Example 1
        1. 8.2.1.1 Design Requirements
          1. 8.2.1.1.1 Design Example List of Materials
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Selecting a Switching Frequency
          2. 8.2.1.2.2  Output Inductor, LOUT
          3. 8.2.1.2.3  Output Capacitance, COUT
          4. 8.2.1.2.4  The Resistive Component of Output Ripple
          5. 8.2.1.2.5  Peak Current Rating of the Inductor
          6. 8.2.1.2.6  Input Capacitance, CIN
          7. 8.2.1.2.7  Switching MOSFETs, QHS and QLS
          8. 8.2.1.2.8  Device Addressing, RADDR0 and RADDR1
          9. 8.2.1.2.9  Current Sense Flter, R16 and C17
          10. 8.2.1.2.10 Voltage Decoupling Capacitors, CBP3, CBP6, and CVDD
          11. 8.2.1.2.11 Bootstrap Capacitor, C9
          12. 8.2.1.2.12 Snubber R12 and C16
          13. 8.2.1.2.13 Loop Compensaton Components
          14. 8.2.1.2.14 Output Voltage Set Point, RBIAS
          15. 8.2.1.2.15 Remote Sensing
        3. 8.2.1.3 Application Curves
      2. 8.2.2 TPS40400 12-V Input 5-V Output, 5-A (Maximum) Output Current Converter Design Example 2Added Design Example 2
        1. 8.2.2.1 Design Requirements
          1. 8.2.2.1.1 List of Materials
        2. 8.2.2.2 Application Curves
    3. 8.3 Initialization Setup
      1. 8.3.1 Internal Configuration
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

9 Power Supply Recommendations

The TPS40400 device operates from an input voltage supply between 3 V and 20 V. Proper bypassing of input supplies and internal regulators is also critical for noise performance, as is PCB layout and grounding scheme. See the recommendations in the Layout section.