SLVSJC6 December   2025 TPS544B27W

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Switching Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Operating Frequency and Mode
      2. 6.3.2 Setting the Output Voltage
      3. 6.3.3 DC Load Line
      4. 6.3.4 Fault Management
      5. 6.3.5 Current Sense and Positive Overcurrent Protection
      6. 6.3.6 Negative Overcurrent Limit
      7. 6.3.7 Zero-Crossing Detection
      8. 6.3.8 Overtemperature Protection
      9. 6.3.9 PMBus® Interface
        1. 6.3.9.1 Setting the PMBus® Address
        2. 6.3.9.2 SMBus Alert Response Address
    4. 6.4 Device Functional Modes
      1. 6.4.1 Forced Continuous-Conduction Mode
      2. 6.4.2 DCM Light Load Operation
    5. 6.5 Programming
      1. 6.5.1 PMBus® Command NVM Defaults
  8. 7 Register Maps
    1. 7.1 PMBus® Transaction Types
    2. 7.2 Conventions for Documenting Block Commands
    3. 7.3 PMBus Commands
      1. 7.3.1  OPERATION (Address = 01h)
      2. 7.3.2  ON_OFF_CONFIG (Address = 02h)
      3. 7.3.3  CLEAR_FAULTS (Address = 03h)
      4.      42
      5. 7.3.4  PASSKEY (Address = 0Eh)
      6. 7.3.5  WRITE_PROTECT (Address = 10h)
      7. 7.3.6  STORE_USER_ALL (Address = 15h)
      8.      46
      9. 7.3.7  RESTORE_USER_ALL (Address = 16h)
      10.      48
      11. 7.3.8  CAPABILITY (Address = 19h)
      12. 7.3.9  SMBALERT_MASK (Address = 1Bh)
      13.      51
      14. 7.3.10 SMBALERT_MASK Registers
        1. 7.3.10.1  ALERT_MASK_BYTE (Address = 78h) [Reset = C8h]
        2. 7.3.10.2  ALERT_MASK_WORD (Address = 79h) [Reset = 0Dh]
        3. 7.3.10.3  ALERT_MASK_VOUT (Address = 7Ah) [Reset = XXh]
        4. 7.3.10.4  ALERT_MASK_IOUT (Address = 7Bh) [Reset = XFh]
        5. 7.3.10.5  ALERT_MASK_INPUT (Address = 7Ch) [Reset = XXh]
        6. 7.3.10.6  ALERT_MASK_TEMPERATURE (Address = 7Dh) [Reset = XFh]
        7. 7.3.10.7  ALERT_MASK_CML (Address = 7Eh) [Reset = XXh]
        8. 7.3.10.8  ALERT_MASK_OTHER (Address = 7Fh) [Reset = XFh]
        9. 7.3.10.9  ALERT_MASK_MFR_SPECIFIC (Address = 80h) [Reset = XXh]
        10. 7.3.10.10 ALERT_MASK_PULSE_CATCHER (Address = CEh) [Reset = FXh]
      15. 7.3.11 VOUT_MODE (Address = 20h)
      16. 7.3.12 VOUT_COMMAND (Address = 21h)
      17. 7.3.13 VOUT_TRIM (Address = 22h)
      18. 7.3.14 VOUT_MAX (Address = 24h)
      19.      67
      20. 7.3.15 VOUT_MARGIN_HIGH (Address = 25h)
      21.      69
      22. 7.3.16 VOUT_MARGIN_LOW (Address = 26h)
      23.      71
      24. 7.3.17 VOUT_TRANSITION_RATE (Address = 27h)
      25.      73
      26. 7.3.18 VOUT_DROOP (Address = 28h)
      27. 7.3.19 VOUT_SCALE_LOOP (Address = 29h)
      28.      76
      29. 7.3.20 FREQUENCY_SWITCH (Address = 33h)
      30.      78
      31. 7.3.21 VIN_ON (Address = 35h)
      32.      80
      33. 7.3.22 VIN_OFF (Address = 36h)
      34.      82
      35. 7.3.23 VOUT_OV_FAULT_LIMIT (Address = 40h)
      36.      84
      37. 7.3.24 VOUT_OV_FAULT_RESPONSE (Address = 41h)
      38. 7.3.25 VOUT_OV_WARN_LIMIT (Address = 42h)
      39.      87
      40. 7.3.26 VOUT_UV_WARN_LIMIT (Address = 43h)
      41.      89
      42. 7.3.27 VOUT_UV_FAULT_LIMIT (Address = 44h)
      43.      91
      44. 7.3.28 VOUT_UV_FAULT_RESPONSE (Address = 45h)
      45. 7.3.29 IOUT_OC_FAULT_LIMIT (Address = 46h)
      46.      94
      47. 7.3.30 IOUT_OC_FAULT_RESPONSE (Address = 47h)
      48. 7.3.31 IOUT_OC_WARN_LIMIT (Address = 4Ah)
      49. 7.3.32 OT_FAULT_LIMIT (Address = 4Fh)
      50.      98
      51. 7.3.33 OT_FAULT_RESPONSE (Address = 50h)
      52. 7.3.34 OT_WARN_LIMIT (Address = 51h)
      53.      101
      54. 7.3.35 VIN_OV_FAULT_LIMIT (Address = 55h)
      55.      103
      56. 7.3.36 TON_DELAY (Address = 60h)
      57.      105
      58. 7.3.37 TON_RISE (Address = 61h)
      59. 7.3.38 TOFF_DELAY (Address = 64h)
      60. 7.3.39 TOFF_FALL (Address = 65h)
      61. 7.3.40 PIN_OP_WARN_LIMIT (Address = 6Bh)
      62.      110
      63.      111
      64.      112
      65. 7.3.41 STATUS_BYTE (Address = 78h)
      66. 7.3.42 STATUS_WORD (Address = 79h)
      67. 7.3.43 STATUS_VOUT (Address = 7Ah)
      68. 7.3.44 STATUS_IOUT (Address = 7Bh)
      69. 7.3.45 STATUS_INPUT (Address = 7Ch)
      70. 7.3.46 STATUS_TEMPERATURE (Address = 7Dh)
      71. 7.3.47 STATUS_CML (Address = 7Eh)
      72. 7.3.48 STATUS_OTHER (Address = 7Fh)
      73. 7.3.49 STATUS_MFR_SPECIFIC (Address = 80h)
      74. 7.3.50 READ_VIN (Address = 88h)
      75. 7.3.51 READ_IIN (Address = 89h)
      76. 7.3.52 READ_VOUT (Address = 8Bh)
      77. 7.3.53 READ_IOUT (Address = 8Ch)
      78. 7.3.54 READ_TEMPERATURE_1 (Address = 8Dh)
      79. 7.3.55 READ_PIN (Address = 97h)
      80. 7.3.56 PMBUS_REVISION (Address = 98h)
      81. 7.3.57 MFR_ID (Address = 99h)
      82. 7.3.58 MFR_MODEL (Address = 9Ah)
      83.      131
      84. 7.3.59 MFR_REVISION (Address = 9Bh)
      85. 7.3.60 IC_DEVICE_ID (Address = ADh)
      86. 7.3.61 IC_DEVICE_REV (Address = AEh)
      87.      135
      88. 7.3.62 EXTENDED_WRITE_PROTECT (Address = C7h)
      89. 7.3.63 NVM_PATCH_SPACE (Address = CDh)
      90. 7.3.64 CLOUD_OPTIONS (Address = CFh)
      91. 7.3.65 SYS_CFG_USER1 (Address = D0h)
      92.      140
      93. 7.3.66 SVID_ADDR_CFG_USER (Address = D1h)
      94. 7.3.67 PMBUS_ADDR (Address = D2h)
      95. 7.3.68 IMON_CAL (Address = D4h)
      96. 7.3.69 COMP (Address = D5h)
      97.      145
      98. 7.3.70 VBOOT_DCLL (Address = D6h)
      99. 7.3.71 VBOOT_OFFSET_1 (Address = D7h)
      100. 7.3.72 IIN_CAL (Address = D8h)
      101. 7.3.73 SVID_IMAX (Address = DAh)
      102.      150
      103. 7.3.74 SVID_EXT_CAPABILITY_VIDOMAX (Address = DBh)
      104. 7.3.75 FUSION_ID0 (Address = FCh)
      105. 7.3.76 FUSION_ID1 (Address = FDh)
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Inductor Selection
        2. 8.2.3.2 Input Capacitor Selection
        3. 8.2.3.3 Output Capacitor Selection
        4. 8.2.3.4 VCC/VDRV Bypass Capacitor
        5. 8.2.3.5 BOOT Capacitor Selection
        6. 8.2.3.6 RSENSE Selection
        7. 8.2.3.7 I_IN_P and I_IN_M Capacitor Selection
        8. 8.2.3.8 VRRDY Pullup Resistor Selection
        9. 8.2.3.9 PMBus® Address Resistor Selection
      4. 8.2.4 Application Curves
        1. 8.2.4.1 Thermal Performance
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.39 TOFF_FALL (Address = 65h)

TOFF_FALL is shown in Figure 7-45 and described in Table 7-65.

Return to the Summary Table.

Write Transaction: Write Word
Read Transaction: Read Word
Data Format: LINEAR11
NVM Back-up: EEPROM
Updates: On-the-fly The TOFF_FALL command sets the time, in milliseconds, from when a stop condition is received (as programmed by the ON_OFF_CONFIG command) until the output voltage starts to fall. Refer to the OPERATION and ON_OFF_CONFIG command descriptions for details on when the TOFF_FALL period is used upon receiving a stop condition. A combination of the value programmed into this command and the VBOOT value sets the DAC slew rate to achieve the target soft-stop time. Switching stops and the output voltage stops slewing down when the regulated VOUT reaches 0.2V nominal, however the time programmed into this command is based on the output voltage slewing to 0V. As a result the observed TOFF_FALL time to 0V may different than the value programmed into this command, and is dependent on how long it takes the load to discharge the remaining 0.2V output. Data Validity: Attempts to change the read-only bits (TOFF_FALL[15:4]) are considered as invalid data or unsupported data (ivd) and the device responds as described in the IVD bit in STATUS_CML.

Figure 7-45 TOFF_FALL
15141312111098
EXPONENT[4:0]RESERVEDRESERVEDRESERVED
R-1FhR-0hR-0hR-0h
76543210
RESERVEDRESERVEDRESERVEDRESERVEDTOFF_FALL[3:0]
R-0hR-0hR-0hR-0hR/W-Xh
Table 7-65 TOFF_FALL Field Descriptions
BitFieldTypeResetDescription
15:11EXPONENT[4:0]R1Fh Linear format two's complement exponent. Fixed exponent of -1 resulting in a 0.5ms LSB.
10RESERVEDR0h
9RESERVEDR0h
8RESERVEDR0h
7RESERVEDR0h
6RESERVEDR0h
5RESERVEDR0h
4RESERVEDR0h
3:0TOFF_FALL[3:0]R/WX Linear format mantissa. These bits select the soft-stop time. Possible values are below. When an unsupported value is written, an adjacent available option will be selected.
  • 1h = 0.5ms
  • 2h = 1ms
  • 4h = 2ms
  • 8h = 4ms