SLUSF26 March   2023 TPS546D24S

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 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  Average Current-Mode Control
        1. 7.3.1.1 On-Time Modulator
        2. 7.3.1.2 Current Error Integrator
        3. 7.3.1.3 Voltage Error Integrator
      2. 7.3.2  Linear Regulators
      3. 7.3.3  AVIN and PVIN Pins
      4. 7.3.4  Input Undervoltage Lockout (UVLO)
        1. 7.3.4.1 Fixed AVIN UVLO
        2. 7.3.4.2 Fixed VDD5 UVLO
        3. 7.3.4.3 Programmable PVIN UVLO
        4. 7.3.4.4 EN/UVLO Pin
      5. 7.3.5  Start-Up and Shutdown
      6. 7.3.6  Differential Sense Amplifier and Feedback Divider
      7. 7.3.7  Set Output Voltage and Adaptive Voltage Scaling (AVS)
        1. 7.3.7.1 Reset Output Voltage
        2. 7.3.7.2 Soft Start
      8. 7.3.8  Prebiased Output Start-Up
      9. 7.3.9  Soft Stop and (65h) TOFF_FALL Command
      10. 7.3.10 Power Good (PGOOD)
      11. 7.3.11 Set Switching Frequency
      12. 7.3.12 Frequency Synchronization
      13. 7.3.13 Loop Follower Detection
      14. 7.3.14 Current Sensing and Sharing
      15. 7.3.15 Telemetry
      16. 7.3.16 Overcurrent Protection
      17. 7.3.17 Overvoltage/Undervoltage Protection
      18. 7.3.18 Overtemperature Management
      19. 7.3.19 Fault Management
      20. 7.3.20 Back-Channel Communication
      21. 7.3.21 Switching Node (SW)
      22. 7.3.22 PMBus General Description
      23. 7.3.23 PMBus Address
      24. 7.3.24 PMBus Connections
    4. 7.4 Device Functional Modes
      1. 7.4.1 Programming Mode
      2. 7.4.2 Standalone, Loop Controller, Loop Follower Mode Pin Connections
      3. 7.4.3 Continuous Conduction Mode
      4. 7.4.4 Operation With CNTL Signal (EN/UVLO)
      5. 7.4.5 Operation with (01h) OPERATION Control
      6. 7.4.6 Operation with CNTL and (01h) OPERATION Control
    5. 7.5 Programming
      1. 7.5.1 Supported PMBus Commands
      2. 7.5.2 Pin Strapping
        1. 7.5.2.1 Programming MSEL1
        2. 7.5.2.2 Programming MSEL2
        3. 7.5.2.3 Programming VSEL
        4. 7.5.2.4 Programming ADRSEL
        5. 7.5.2.5 Programming MSEL2 for a Loop Follower Device (GOSNS Tied to BP1V5)
        6. 7.5.2.6 Pin-Strapping Resistor Configuration
    6. 7.6 Register Maps
      1. 7.6.1  Conventions for Documenting Block Commands
      2. 7.6.2  (01h) OPERATION
      3. 7.6.3  (02h) ON_OFF_CONFIG
      4. 7.6.4  (03h) CLEAR_FAULTS
      5. 7.6.5  (04h) PHASE
      6. 7.6.6  (10h) WRITE_PROTECT
      7. 7.6.7  (15h) STORE_USER_ALL
      8. 7.6.8  (16h) RESTORE_USER_ALL
      9. 7.6.9  (19h) CAPABILITY
      10. 7.6.10 (1Bh) SMBALERT_MASK
      11. 7.6.11 (1Bh) SMBALERT_MASK_VOUT
      12. 7.6.12 (1Bh) SMBALERT_MASK_IOUT
      13. 7.6.13 (1Bh) SMBALERT_MASK_INPUT
      14. 7.6.14 (1Bh) SMBALERT_MASK_TEMPERATURE
      15. 7.6.15 (1Bh) SMBALERT_MASK_CML
      16. 7.6.16 (1Bh) SMBALERT_MASK_OTHER
      17. 7.6.17 (1Bh) SMBALERT_MASK_MFR
      18. 7.6.18 (20h) VOUT_MODE
      19. 7.6.19 (21h) VOUT_COMMAND
      20. 7.6.20 (22h) VOUT_TRIM
      21. 7.6.21 (24h) VOUT_MAX
      22. 7.6.22 (25h) VOUT_MARGIN_HIGH
      23. 7.6.23 (26h) VOUT_MARGIN_LOW
      24. 7.6.24 (27h) VOUT_TRANSITION_RATE
      25. 7.6.25 (29h) VOUT_SCALE_LOOP
      26. 7.6.26 (2Bh) VOUT_MIN
      27. 7.6.27 (33h) FREQUENCY_SWITCH
      28. 7.6.28 (35h) VIN_ON
      29. 7.6.29 (36h) VIN_OFF
      30. 7.6.30 (37h) INTERLEAVE
      31. 7.6.31 (38h) IOUT_CAL_GAIN
      32. 7.6.32 (39h) IOUT_CAL_OFFSET
      33. 7.6.33 (40h) VOUT_OV_FAULT_LIMIT
      34. 7.6.34 (41h) VOUT_OV_FAULT_RESPONSE
      35. 7.6.35 (42h) VOUT_OV_WARN_LIMIT
      36. 7.6.36 (43h) VOUT_UV_WARN_LIMIT
      37. 7.6.37 (44h) VOUT_UV_FAULT_LIMIT
      38. 7.6.38 (45h) VOUT_UV_FAULT_RESPONSE
      39. 7.6.39 (46h) IOUT_OC_FAULT_LIMIT
      40. 7.6.40 (47h) IOUT_OC_FAULT_RESPONSE
      41. 7.6.41 (4Ah) IOUT_OC_WARN_LIMIT
      42. 7.6.42 (4Fh) OT_FAULT_LIMIT
      43. 7.6.43 (50h) OT_FAULT_RESPONSE
      44. 7.6.44 (51h) OT_WARN_LIMIT
      45. 7.6.45 (55h) VIN_OV_FAULT_LIMIT
      46. 7.6.46 (56h) VIN_OV_FAULT_RESPONSE
      47. 7.6.47 (58h) VIN_UV_WARN_LIMIT
      48. 7.6.48 (60h) TON_DELAY
      49. 7.6.49 (61h) TON_RISE
      50. 7.6.50 (62h) TON_MAX_FAULT_LIMIT
      51. 7.6.51 (63h) TON_MAX_FAULT_RESPONSE
      52. 7.6.52 (64h) TOFF_DELAY
      53. 7.6.53 (65h) TOFF_FALL
      54. 7.6.54 (78h) STATUS_BYTE
      55. 7.6.55 (79h) STATUS_WORD
      56. 7.6.56 (7Ah) STATUS_VOUT
      57. 7.6.57 (7Bh) STATUS_IOUT
      58. 7.6.58 (7Ch) STATUS_INPUT
      59. 7.6.59 (7Dh) STATUS_TEMPERATURE
      60. 7.6.60 (7Eh) STATUS_CML
      61. 7.6.61 (7Fh) STATUS_OTHER
      62. 7.6.62 (80h) STATUS_MFR_SPECIFIC
      63. 7.6.63 (88h) READ_VIN
      64. 7.6.64 (8Bh) READ_VOUT
      65. 7.6.65 (8Ch) READ_IOUT
      66. 7.6.66 (8Dh) READ_TEMPERATURE_1
      67. 7.6.67 (98h) PMBUS_REVISION
      68. 7.6.68 (99h) MFR_ID
      69. 7.6.69 (9Ah) MFR_MODEL
      70. 7.6.70 (9Bh) MFR_REVISION
      71. 7.6.71 (9Eh) MFR_SERIAL
      72. 7.6.72 (ADh) IC_DEVICE_ID
      73. 7.6.73 (AEh) IC_DEVICE_REV
      74. 7.6.74 (B1h) USER_DATA_01 (COMPENSATION_CONFIG)
      75. 7.6.75 (B5h) USER_DATA_05 (POWER_STAGE_CONFIG)
      76. 7.6.76 (D0h) MFR_SPECIFIC_00 (TELEMETRY_CONFIG)
      77. 7.6.77 (DAh) MFR_SPECIFIC_10 (READ_ALL)
      78. 7.6.78 (DBh) MFR_SPECIFIC_11 (STATUS_ALL)
      79. 7.6.79 (DCh) MFR_SPECIFIC_12 (STATUS_PHASE)
      80. 7.6.80 (E3h) MFR_SPECIFIC_19 (PGOOD_CONFIG)
      81. 7.6.81 (E4h) MFR_SPECIFIC_20 (SYNC_CONFIG)
      82. 7.6.82 (ECh) MFR_SPECIFIC_28 (STACK_CONFIG)
      83. 7.6.83 (EDh) MFR_SPECIFIC_29 (MISC_OPTIONS)
      84. 7.6.84 (EEh) MFR_SPECIFIC_30 (PIN_DETECT_OVERRIDE)
      85. 7.6.85 (EFh) MFR_SPECIFIC_31 (DEVICE_ADDRESS)
      86. 7.6.86 (F0h) MFR_SPECIFIC_32 (NVM_CHECKSUM)
      87. 7.6.87 (F1h) MFR_SPECIFIC_33 (SIMULATE_FAULT)
      88. 7.6.88 (FAh) MFR_SPECIFIC_42 (PASSKEY)
      89. 7.6.89 (FBh) MFR_SPECIFIC_43 (EXT_WRITE_PROTECT)
      90. 7.6.90 (FCh) MFR_SPECIFIC_44 (FUSION_ID0)
      91. 7.6.91 (FDh) MFR_SPECIFIC_45 (FUSION_ID1)
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Custom Design With WEBENCH® Tools
        2. 8.2.2.2  Switching Frequency
        3. 8.2.2.3  Inductor Selection
        4. 8.2.2.4  Output Capacitor Selection
          1. 8.2.2.4.1 Output Voltage Deviation During Load Transient
          2. 8.2.2.4.2 Output Voltage Ripple
        5. 8.2.2.5  Input Capacitor Selection
        6. 8.2.2.6  AVIN, BP1V5, VDD5 Bypass Capacitor
        7. 8.2.2.7  Bootstrap Capacitor Selection
        8. 8.2.2.8  R-C Snubber
        9. 8.2.2.9  Output Voltage Setting (VSEL Pin)
        10. 8.2.2.10 Compensation Selection (MSEL1 Pin)
        11. 8.2.2.11 Soft Start, Overcurrent Protection, and Stacking Configuration (MSEL2 Pin)
        12. 8.2.2.12 Enable and UVLO
        13. 8.2.2.13 ADRSEL
        14. 8.2.2.14 Pin-Strapping Resistor Selection
        15. 8.2.2.15 BCX_CLK and BCX_DAT
      3. 8.2.3 Application Curves
    3. 8.3 Two-Phase Application
      1. 8.3.1  Design Requirements
      2. 8.3.2  Switching Frequency
      3. 8.3.3  Inductor Selection
      4. 8.3.4  Output Capacitor Selection
      5. 8.3.5  Input Capacitor Selection
      6. 8.3.6  AVIN, BP1V5, VDD5 Bypass Capacitor
      7. 8.3.7  Bootstrap Capacitor Selection
      8. 8.3.8  R-C Snubber
      9. 8.3.9  Output Voltage Setting (VSEL Pin)
      10. 8.3.10 Compensation Selection (MSEL1 Pin)
      11. 8.3.11 GOSNS/FLWR Pin of Loop Follower Devices
      12. 8.3.12 Soft Start, Overcurrent Protection, and Stacking Configuration (MSEL2 Pin)
      13. 8.3.13 Enable, UVLO
      14. 8.3.14 VSHARE Pin
        1. 8.3.14.1 ADRSEL Pin
      15. 8.3.15 SYNC Pin
      16. 8.3.16 VOSNS Pin of Loop Follower Devices
      17. 8.3.17 Unused Pins of Loop Follower Devices
      18. 8.3.18 Two-phase Application Curves
    4. 8.4 Four-Phase Application
    5. 8.5 Power Supply Recommendations
    6. 8.6 Layout
      1. 8.6.1 Layout Guidelines
      2. 8.6.2 Layout Example
      3. 8.6.3 Mounting and Thermal Profile Recommendation
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
        2. 9.1.2.2 Texas Instruments Fusion Digital Power Designer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

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

7.5.2 Pin Strapping

The TPS546D24S provides four IC pins that allow the initial PMBus programming value on critical PMBus commands to be selected by the resistors connected to that pin without requiring PMBus communication. Whether a specific PMBus command is initialized to the value selected by the detected resistance or stored NVM memory is determined by the commands bit in the PIN_DETECT_OVERRIDE PMBus Command. The four pins and the commands they program for a loop controller or Stand-alone device (GOSNS connected to Ground) are provided in Table 7-7.

Each pin can be programmed in one of four ways:

  • Pin shorted to AGND with less than 20 Ω
  • Pin floating or tied to BP1V5 with more than 1 MΩ
  • Pin bypassed to AGND through a resistor according to R2G code only (16 Resistor Options)
  • Pin bypassed to AGND through a resistor according to R2G code and to BP1V5 according to Divider Code (16 Resistor x 16 Resistor Divider Options)

Due to the flexibility of programming options with up to 274 configurations per pin, it is recommended that designers consider using one of the available design tools, such as TPS546x24S Compensation and Pin-Strap Resistor Calculator to assist with proper programming resistor selection.

Table 7-7 TPS546D24S Pin Programming Summary
PINRESISTORSPMBus REGISTERS
MSEL1Resistor to AGNDCOMPENSATION_CONFIG
Resistor DividerCOMPENSATION_CONFIG, FREQUENCY_SWITCH
MSEL2Resistor to AGNDIOUT_OC_WARN_LIMIT, IOUT_OC_FAULT_LIMIT, STACK_CONFIG
Resistor DividerTON_RISE
VSELBothVOUT_COMMAND, VOUT_SCALE_LOOP, VOUT_MAX, VOUT_MIN
ADRSELResistor to AGNDDEVICE_ADDRESS
Resistor DividerDEVICE_ADDRESS, SYNC_CONFIG, INTERLEAVE
Note:

Resistor divider values of "none" can be implemented with no resistor to BP1V5 or use a 1-MΩ resistor to BP1V5 for improved reliability and noise immunity.

Loop follower with GOSNS tied to BP1V5 only use the resistor from MSEL2 to AGND to program the following:

The loop follower receives all other pin programmed values from the loop controller over BCX as part of the power-on reset function.

Note:

The high precision Pin-Detection programming which provides 8-bit resolution for each pin in the TPS546D24S can be sensitive to PCB contamination from flux, moisture, and debris. As such, users must consider committing Pin Programmed values to User Non-Volatile memory and disable future use of Pin Strapped values as part of the product flow. The programming sequence to commit Pin Programmed PMBus register values to NVM and disable future use of Pin Strapped programming is:

  • Select MSEL1, MSEL2, VSEL and ADRSEL programming resistors to program the desired PMBus register values.
  • Power AVIN and VDD5 above their UVLOs to initiate pin detection and enable PMBus communication.
  • Update any PMBus register values not programmed to their final value by Pin Detection.
  • Write the value 0000h using the Write Word protocol to Section 7.6.84.
  • Send the command code 15h using the Send Byte protocol to initialize a Section 7.6.7 function.
  • Allow a minimum 100 ms for the device to complete a burn of NVM User Store. Loss of AVIN or VDD5 power during this 100 ms can compromise the integrity of the NVM. Failure to complete the NVM burn can result in a corruption of NVM and a POR fault on subsequent power on resets.