SLVSGG4B september   2022  – june 2023 TPS25990

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Description (continued)
  7. 6 Pin Configuration and Functions
  8. 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  Logic Interface DC Characteristics
    7. 7.7  Telemetry
    8. 7.8  PMBus Interface Timing Characteristics
    9. 7.9  External EEPROM Interface Timing Characteristics
    10. 7.10 Timing Requirements
    11. 7.11 Switching Characteristics
    12. 7.12 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Undervoltage Protection
      2. 8.3.2  Insertion Delay
      3. 8.3.3  Overvoltage Protection
      4. 8.3.4  Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 8.3.4.1 Slew rate (dVdt) and Inrush Current Control
          1. 8.3.4.1.1 Start-Up Timeout
        2. 8.3.4.2 Steady-State Overcurrent Protection (Circuit-Breaker)
        3. 8.3.4.3 Active Current Limiting During Start-Up
        4. 8.3.4.4 Short-Circuit Protection
      5. 8.3.5  Single Point Failure Mitigation
        1. 8.3.5.1 IMON Pin Single Point Failure
        2. 8.3.5.2 ILIM Pin Single Point Failure
        3. 8.3.5.3 IREF Pin Single Point Failure
      6. 8.3.6  Analog Load Current Monitor (IMON)
      7. 8.3.7  Overtemperature Protection
      8. 8.3.8  Analog Junction Temperature Monitor (TEMP)
      9. 8.3.9  FET Health Monitoring
      10. 8.3.10 General Purpose Digital Input/Output Pins
        1. 8.3.10.1 Fault Response and Indication (FLT)
        2. 8.3.10.2 Power Good Indication (PG)
        3. 8.3.10.3 Parallel Device Synchronization (SWEN)
      11. 8.3.11 Stacking Multiple eFuses for Unlimited Scalability
        1. 8.3.11.1 Current Balancing During Start-Up
      12. 8.3.12 General Purpose Comparators
      13. 8.3.13 Output Discharge
      14. 8.3.14 PMBus® Digital Interface
        1. 8.3.14.1  PMBus® Device Addressing
        2. 8.3.14.2  SMBus Protocol
        3. 8.3.14.3  SMBus™ Message Formats
        4. 8.3.14.4  Packet Error Checking
        5. 8.3.14.5  Group Commands
        6. 8.3.14.6  SMBus™ Alert Response Address (ARA)
        7. 8.3.14.7  PMBus® Commands
          1. 8.3.14.7.1 Detailed Descriptions of PMBus® Commands
            1. 8.3.14.7.1.1  OPERATION (01h, Read/Write Byte)
            2. 8.3.14.7.1.2  CLEAR_FAULTS (03h, Send Byte)
            3. 8.3.14.7.1.3  RESTORE_FACTORY_DEFAULTS (12h, Send Byte)
            4. 8.3.14.7.1.4  STORE_USER_ALL (15h, Send Byte)
            5. 8.3.14.7.1.5  RESTORE_USER_ALL (16h, Send Byte)
            6. 8.3.14.7.1.6  BB_ERASE (F5h, Send Byte)
            7. 8.3.14.7.1.7  FETCH_BB_EEPROM (F6h, Send Byte)
            8. 8.3.14.7.1.8  POWER_CYCLE (D9h, Send Byte)
            9. 8.3.14.7.1.9  MFR_WRITE_PROTECT (F8h, Read/Write Byte)
            10. 8.3.14.7.1.10 CAPABILITY (19h, Read Byte)
            11. 8.3.14.7.1.11 STATUS_BYTE (78h, Read Byte)
            12. 8.3.14.7.1.12 STATUS_WORD (79h, Read Word)
            13. 8.3.14.7.1.13 STATUS_OUT (7Ah, Read Byte)
            14. 8.3.14.7.1.14 STATUS_IOUT (7Bh, Read Byte)
            15. 8.3.14.7.1.15 STATUS_INPUT (7Ch, Read Byte)
            16. 8.3.14.7.1.16 STATUS_TEMP (7Dh, Read Byte)
            17. 8.3.14.7.1.17 STATUS_CML (7Eh, Read Byte)
            18. 8.3.14.7.1.18 STATUS_MFR_SPECIFIC (80h, Read Byte)
            19. 8.3.14.7.1.19 STATUS_MFR_SPECIFIC_2 (F3h, Read Word)
            20. 8.3.14.7.1.20 PMBUS_REVISION (98h, Read Byte)
            21. 8.3.14.7.1.21 MFR_ID (99h, Block Read)
            22. 8.3.14.7.1.22 MFR_MODEL (9Ah, Block Read)
            23. 8.3.14.7.1.23 MFR_REVISION (9Bh, Block Read)
            24. 8.3.14.7.1.24 READ_VIN (88h, Read Word)
            25. 8.3.14.7.1.25 READ_VOUT (8Bh, Read Word)
            26. 8.3.14.7.1.26 READ_IIN (89h, Read Word)
            27. 8.3.14.7.1.27 READ_TEMPERATURE_1 (8Dh, Read Word)
            28. 8.3.14.7.1.28 READ_VAUX (D0h, Read Word)
            29. 8.3.14.7.1.29 READ_PIN (97h, Read Word)
            30. 8.3.14.7.1.30 READ_EIN (86h, Block Read)
            31. 8.3.14.7.1.31 READ_VIN_AVG (DCh, Read Word)
            32. 8.3.14.7.1.32 READ_VIN_MIN (D1h, Read Word)
            33. 8.3.14.7.1.33 READ_VIN_PEAK (D2h, Read Word)
            34. 8.3.14.7.1.34 READ_VOUT_AVG (DDh, Read Word)
            35. 8.3.14.7.1.35 READ_VOUT_MIN (DAh, Read Word)
            36. 8.3.14.7.1.36 READ_IIN_AVG (DEh, Read Word)
            37. 8.3.14.7.1.37 READ_IIN_PEAK (D4h, Read Word)
            38. 8.3.14.7.1.38 READ_TEMP_AVG (D6h, Read Word)
            39. 8.3.14.7.1.39 READ_TEMP_PEAK (D7h, Read Word)
            40. 8.3.14.7.1.40 READ_PIN_AVG (DFh, Read Word)
            41. 8.3.14.7.1.41 READ_PIN_PEAK (D5h, Read Word)
            42. 8.3.14.7.1.42 READ_SAMPLE_BUF (D8h, Block Read)
            43. 8.3.14.7.1.43 READ_BB_RAM (FDh, Block Read)
            44. 8.3.14.7.1.44 READ_BB_EEPROM (F4h, Block Read)
            45. 8.3.14.7.1.45 BB_TIMER (FAh, Read Byte)
            46. 8.3.14.7.1.46 PMBUS_ADDR (FBh, Read/Write Byte)
            47. 8.3.14.7.1.47 VIN_UV_WARN (58h, Read/Write Word)
            48. 8.3.14.7.1.48 VIN_UV_FLT (59h, Read/Write Word)
            49. 8.3.14.7.1.49 VIN_OV_WARN (57h, Read/Write Word)
            50. 8.3.14.7.1.50 VIN_OV_FLT (55h, Read/Write Word)
            51. 8.3.14.7.1.51 VOUT_UV_WARN (43h, Read/Write Word)
            52. 8.3.14.7.1.52 VOUT_PGTH (5Fh, Read/Write Word)
            53. 8.3.14.7.1.53 OT_WARN (51h, Read/Write Word)
            54. 8.3.14.7.1.54 OT_FLT (4Fh, Read/Write Word)
            55. 8.3.14.7.1.55 PIN_OP_WARN (6Bh, Read/Write Word)
            56. 8.3.14.7.1.56 IIN_OC_WARN (5Dh, Read/Write Word)
            57. 8.3.14.7.1.57 VIREF (E0h, Read/Write Byte)
            58. 8.3.14.7.1.58 GPIO_CONFIG_12 (E1h, Read/Write Byte)
            59. 8.3.14.7.1.59 GPIO_CONFIG_34 (E2h, Read/Write Byte)
            60. 8.3.14.7.1.60 ALERT_MASK (DBh, Read/Write Word)
            61. 8.3.14.7.1.61 FAULT_MASK (E3h, Read/Write Word)
            62. 8.3.14.7.1.62 DEVICE_CONFIG (E4h, Read/Write Word)
            63. 8.3.14.7.1.63 BB_CONFIG (E5h, Read/Write Byte)
            64. 8.3.14.7.1.64 OC_TIMER (E6h, Read/Write Byte)
            65. 8.3.14.7.1.65 RETRY_CONFIG (E7h, Read/Write Byte)
            66. 8.3.14.7.1.66 ADC_CONFIG_1 (E8h, Read/Write Byte)
            67. 8.3.14.7.1.67 ADC_CONFIG_2 (E9h, Read/Write Byte)
            68. 8.3.14.7.1.68 PK_MIN_AVG (EAh, Read/Write Byte)
            69. 8.3.14.7.1.69 VCMPxREF (EBh, Read/Write Byte)
            70. 8.3.14.7.1.70 PSU_VOLTAGE (ECh, Read/Write Byte)
            71. 8.3.14.7.1.71 CABLE_DROP (EDh, Read/Write Byte)
            72. 8.3.14.7.1.72 GPDAC1 (F0h, Read/Write Byte)
            73. 8.3.14.7.1.73 GPDAC2 (F1h, Read/Write Byte)
            74. 8.3.14.7.1.74 INS_DLY (F9h, Read/Write Byte)
        8. 8.3.14.8  Analog-to-digital Converter
        9. 8.3.14.9  Digital-to-analog Converters
        10. 8.3.14.10 DIRECT format Conversion
        11. 8.3.14.11 Blackbox Fault Recording
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Single Device, Standalone Operation
      2. 9.1.2 Multiple Devices, Parallel Connection
      3. 9.1.3 Multiple Devices, Independent Operation (Multi-zone)
    2. 9.2 Typical Application: 12-V, 4-kW Power Path Protection with PMBus® Interface in Datacenter Servers
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Performance Plots
    3. 9.3 Best Design Practices
    4. 9.4 Power Supply Recommendations
      1. 9.4.1 Transient Protection
      2. 9.4.2 Output Short-Circuit Measurements
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
8.3.14.7.1.9 MFR_WRITE_PROTECT (F8h, Read/Write Byte)

MFR_WRITE_PROTECT is a manufacturer specific command used to lock or unlock access to the configuration registers, NVM and EEPROM to prevent accidental/spurious PMBus® writes from altering the device configuration. It also blocks access to the OPERATION, RESTORE_FACTORY_DEFAULTS, STORE_USER_ALL, RESTORE_USER_ALL, BB_ERASE, and POWER_CYCLE commands to prevent accidental/spurious PMBus® writes from altering the device state. The device is locked by default after power up or enable recycling.

This command uses the PMBus® read or write byte protocol.

A valid unlock command contains a data byte with Bit[7] equal to one (1) followed by a 7-bit password that matches a predefined pattern of 0x0100010. Writing 0xA2h in the MFR_WRITE_PROTECT register unlocks the device. Writing 0x00h in the MFR_WRITE_PROTECT register locks the device.

Note:

Writing a data byte other than 0xA2h or 0x00h in the MFR_WRITE_PROTECT register will not change the lock status of the device, but will generate a CML error and set the INV_DATA bit in STATUS_CML register.

Table 8-8 MFR_WRITE_PROTECT Command Description
BitName

Value

Description

Default

Access

7

UNLOCK

Lock Bit

Read/Write

0

Configuration register/NVM space locked

0

1

Configuration register/NVM space unlocked

6:0

PWD

Password

0000000

Configuration register/NVM space locked

0000000
0100010Configuration register/NVM space unlocked