SLVSHO1A March   2025  – December 2025 TPS1689

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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  Telemetry
    7. 6.7  PMBus and GPIO DC Characteristics
    8. 6.8  Logic Interface
    9. 6.9  Timing Requirements
    10. 6.10 Switching Characteristics
    11. 6.11 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Undervoltage Protection
      2. 7.3.2  Insertion Delay
      3. 7.3.3  Overvoltage Protection
      4. 7.3.4  Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 7.3.4.1 Slew rate (dVdt) and Inrush Current Control
          1. 7.3.4.1.1 Start-Up Timeout
        2. 7.3.4.2 Steady-State Overcurrent Protection (Circuit-Breaker)
        3. 7.3.4.3 Active Current Limiting During Start-Up
        4. 7.3.4.4 Short-Circuit Protection
      5. 7.3.5  Analog Load Current Monitor (IMON)
      6. 7.3.6  Overtemperature Protection
      7. 7.3.7  Analog Junction Temperature Monitor (TEMP)
      8. 7.3.8  FET Health Monitoring
      9. 7.3.9  Single Point Failure Mitigation
        1. 7.3.9.1 IMON Pin Single Point Failure
        2. 7.3.9.2 IREF Pin Single Point Failure
      10. 7.3.10 General Purpose Digital Input/Output Pins
        1. 7.3.10.1 Fault Response and Indication (FLT)
        2. 7.3.10.2 Power Good Indication (PG)
        3. 7.3.10.3 Parallel Device Synchronization (SWEN)
      11. 7.3.11 Stacking Multiple eFuses for Unlimited Scalability
        1. 7.3.11.1 Current Balancing During Start-Up
      12. 7.3.12 Quick Output Discharge(QOD)
      13. 7.3.13 Write Protect Feature(WP#)
      14. 7.3.14 PMBus® Digital Interface
        1. 7.3.14.1  PMBus® Device Addressing
        2. 7.3.14.2  SMBus Protocol
        3. 7.3.14.3  SMBus™ Message Formats
        4. 7.3.14.4  Packet Error Checking
        5. 7.3.14.5  Group Commands
        6. 7.3.14.6  SMBus™ Alert Response Address (ARA)
        7. 7.3.14.7  PMBus® Commands
          1. 7.3.14.7.1 Detailed Descriptions of PMBus® Commands
            1. 7.3.14.7.1.1  OPERATION (01h, Read/Write Byte)
            2. 7.3.14.7.1.2  CLEAR_FAULTS (03h, Send Byte)
            3. 7.3.14.7.1.3  RESTORE_FACTORY_DEFAULTS (12h, Send Byte)
            4. 7.3.14.7.1.4  STORE_USER_ALL (15h, Send Byte)
            5. 7.3.14.7.1.5  RESTORE_USER_ALL (16h, Send Byte)
            6. 7.3.14.7.1.6  BB_ERASE (F5h, Send Byte)
            7. 7.3.14.7.1.7  FETCH_BB_EEPROM (F6h, Send Byte)
            8. 7.3.14.7.1.8  CLEAR_BB_RAM (FCh, Send Byte)
            9. 7.3.14.7.1.9  POWER_CYCLE (D9h, Send Byte)
            10. 7.3.14.7.1.10 MFR_WRITE_PROTECT (F8h, Read/Write Byte)
            11. 7.3.14.7.1.11 CAPABILITY (19h, Read Byte)
            12. 7.3.14.7.1.12 STATUS_BYTE (78h, Read Byte)
            13. 7.3.14.7.1.13 STATUS_WORD (79h, Read Word)
            14. 7.3.14.7.1.14 STATUS_OUT (7Ah, Read Byte)
            15. 7.3.14.7.1.15 STATUS_IOUT (7Bh, Read Byte)
            16. 7.3.14.7.1.16 STATUS_INPUT (7Ch, Read Byte)
            17. 7.3.14.7.1.17 STATUS_TEMP (7Dh, Read Byte)
            18. 7.3.14.7.1.18 STATUS_CML (7Eh, Read Byte)
            19. 7.3.14.7.1.19 STATUS_MFR_SPECIFIC (80h, Read Byte)
            20. 7.3.14.7.1.20 STATUS_MFR_SPECIFIC_2 (F3h, Read Word)
            21. 7.3.14.7.1.21 PMBUS_REVISION (98h, Read Byte)
            22. 7.3.14.7.1.22 MFR_ID (99h, Block Read)
            23. 7.3.14.7.1.23 MFR_MODEL (9Ah, Block Read)
            24. 7.3.14.7.1.24 MFR_REVISION (9Bh, Block Read)
            25. 7.3.14.7.1.25 READ_VIN (88h, Read Word)
            26. 7.3.14.7.1.26 READ_VOUT (8Bh, Read Word)
            27. 7.3.14.7.1.27 READ_IIN (89h, Read Word)
            28. 7.3.14.7.1.28 READ_TEMPERATURE_1 (8Dh, Read Word)
            29. 7.3.14.7.1.29 READ_VAUX (D0h, Read Word)
            30. 7.3.14.7.1.30 READ_PIN (97h, Read Word)
            31. 7.3.14.7.1.31 READ_EIN (86h, Block Read)
            32. 7.3.14.7.1.32 READ_VIN_AVG (DCh, Read Word)
            33. 7.3.14.7.1.33 READ_VIN_MIN (D1h, Read Word)
            34. 7.3.14.7.1.34 READ_VIN_PEAK (D2h, Read Word)
            35. 7.3.14.7.1.35 READ_VOUT_AVG (DDh, Read Word)
            36. 7.3.14.7.1.36 READ_VOUT_MIN (DAh, Read Word)
            37. 7.3.14.7.1.37 READ_IIN_AVG (DEh, Read Word)
            38. 7.3.14.7.1.38 READ_IIN_PEAK (D4h, Read Word)
            39. 7.3.14.7.1.39 READ_TEMP_AVG (D6h, Read Word)
            40. 7.3.14.7.1.40 READ_TEMP_PEAK (D7h, Read Word)
            41. 7.3.14.7.1.41 READ_PIN_AVG (DFh, Read Word)
            42. 7.3.14.7.1.42 READ_PIN_PEAK (D5h, Read Word)
            43. 7.3.14.7.1.43 READ_SAMPLE_BUF (D8h, Block Read)
            44. 7.3.14.7.1.44 READ_BB_RAM (FDh, Block Read)
            45. 7.3.14.7.1.45 READ_BB_EEPROM (F4h, Block Read)
            46. 7.3.14.7.1.46 BB_TIMER (FAh, Read Byte)
            47. 7.3.14.7.1.47 PMBUS_ADDR (FBh, Read/Write Byte)
            48. 7.3.14.7.1.48 VIN_UV_WARN (58h, Read/Write Word)
            49. 7.3.14.7.1.49 VIN_UV_FLT (59h, Read/Write Word)
            50. 7.3.14.7.1.50 VIN_OV_WARN (57h, Read/Write Word)
            51. 7.3.14.7.1.51 VIN_OV_FLT (55h, Read/Write Word)
            52. 7.3.14.7.1.52 VOUT_UV_WARN (43h, Read/Write Word)
            53. 7.3.14.7.1.53 VOUT_PGTH (5Fh, Read/Write Word)
            54. 7.3.14.7.1.54 OT_WARN (51h, Read/Write Word)
            55. 7.3.14.7.1.55 OT_FLT (4Fh, Read/Write Word)
            56. 7.3.14.7.1.56 PIN_OP_WARN (6Bh, Read/Write Word)
            57. 7.3.14.7.1.57 IIN_OC_WARN (5Dh, Read/Write Word)
            58. 7.3.14.7.1.58 ALERT_MASK (DBh, Read/Write Word)
            59. 7.3.14.7.1.59 VIREF (E0h, Read/Write Byte)
            60. 7.3.14.7.1.60 AUX/TEMP/EEDATA/EECLK/GPIOx (E1h, Read/Write Byte)
            61. 7.3.14.7.1.61 SMBA_FLT_CONFIG (E2h, Read/Write Byte)
            62. 7.3.14.7.1.62 FAULT_MASK (E3h, Read/Write Word)
            63. 7.3.14.7.1.63 DEVICE_CONFIG (E4h, Read/Write Word)
            64. 7.3.14.7.1.64 BB_CONFIG (E5h, Read/Write Byte)
            65. 7.3.14.7.1.65 OC_TIMER (E6h, Read/Write Byte)
            66. 7.3.14.7.1.66 RETRY_CONFIG (E7h, Read/Write Byte)
            67. 7.3.14.7.1.67 ADC_CONFIG_1 (E8h, Read/Write Byte)
            68. 7.3.14.7.1.68 ADC_CONFIG_2 (E9h, Read/Write Byte)
            69. 7.3.14.7.1.69 PK_MIN_AVG (EAh, Read/Write Byte)
            70. 7.3.14.7.1.70 PSU_VOLTAGE (ECh, Read/Write Byte)
            71. 7.3.14.7.1.71 CABLE_DROP (EDh, Read/Write Byte)
            72. 7.3.14.7.1.72 IMON OFFSET CALIBRATION (F2h, Read/Write Byte)
            73. 7.3.14.7.1.73 INS_DLY (F9h, Read/Write Byte)
        8. 7.3.14.8  Analog-to-Digital Converter
        9. 7.3.14.9  Digital-to-Analog Converters
        10. 7.3.14.10 DIRECT Format Conversion
        11. 7.3.14.11 Blackbox Fault Recording
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Single Device, Standalone Operation
      2. 8.1.2 Single TPS1689x and Multiple TPS1685 Devices, Parallel Connection
      3. 8.1.3 Multiple TPS1689x Devices: Parallel Connection With Individual Telemetry
      4. 8.1.4 Multiple Devices, Independent Operation (Multi-zone)
    2. 8.2 Typical Application: 54V, 2kW Power Path Protection with PMBus® Interface in Datacenter Servers
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Performance Plots
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Transient Protection and Other Design Considerations
      2. 8.3.2 Output Short-Circuit Measurements
    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 Third-Party Products Disclaimer
    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
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.14.7 PMBus® Commands

Table 7-6 shows the list of PMBus® commands supported by the TPS1689x eFuse.

Table 7-6 TPS1689x PMBus® Commands List
COMMAND NAMECODETYPEDESCRIPTIONPMBus®TRANSACTIONDEFAULT VALUESTORED IN ON-CHIP NON-VOLATILE MEMORYSTORED IN EEPROM
OPERATION

01h

Control

eFuse ON/OFF control

Read/Write byte w/ PEC

0x80

N/A

N/A

CLEAR_FAULTS

03h

ControlClear all fault status bits and Blackbox RAM

Send byte w/ PEC

N/AN/AN/A
RESTORE_FACTORY_DEFAULTS

12h

ControlInitialize/Reset all configuration registers to their factory default valuesSend byte w/ PECN/AN/A

N/A

STORE_USER_ALL

15h

ControlStore configuration values to NVM/EEPROMSend byte w/ PECN/AN/A

N/A

RESTORE_USER_ALL

16h

ControlInitialize all configuration registers with the user programmed values stored in NVM/EEPROMSend byte w/ PECN/AN/A

N/A

BB_ERASE

F5h

ControlErase Blackbox data in external EEPROMSend byte w/ PECN/AN/A

N/A

FETCH_BB_EEPROM

F6h

ControlFetch Blackbox EEPROM contents into internal shadow registersSend byte w/ PECN/AN/A

N/A

CLEAR_BB_RAMFChControlClears the contents of bbox RAMSend byte w/ PECN/AN/AN/A
POWER_CYCLE

D9h

Control

Power down output and restart after a delay programmed through the RETRY_CONFIG register

Send byte w/ PECN/AN/A

N/A

MFR_WRITE_PROTECT

F8h

ControlEnable/Disable write protection for OPERATION & POWER_CYCLE commands, configuration registers, NVM, and EEPROMRead/write byte w/ PEC

0x00

N/A

N/A

CAPABILITY

19h

Telemetry

Supported PMBus® featuresRead byte w/ PEC

0xD0

Y

N

STATUS_BYTE

78h

TelemetryStatus register lower byteRead byte w/ PEC

Undefined

N

N

STATUS_WORD

79h

TelemetryStatus register wordRead word w/ PECUndefined

N

Y

STATUS_OUT

7Ah

TelemetryOUT bus statusRead byte w/ PECUndefined

N

N

STATUS_IOUT

7Bh

TelemetryOUT current statusRead byte w/ PECUndefined

N

N

STATUS_INPUT

7Ch

Telemetry

IN bus status

Read byte w/ PECUndefined

N

Y

STATUS_TEMP

7Dh

TelemetryDevice temperature statusRead byte w/ PECUndefined

N

N

STATUS_CML

7Eh

TelemetryCommunications, Memory, Logic statusRead byte w/ PECUndefined

N

N

STATUS_MFR_SPECIFIC

80h

TelemetryManufacturer specific fault statusRead byte w/ PECUndefined

N

Y

STATUS_MFR_SPECIFIC

_2

F3h

TelemetryAdditional manufacturer specific fault statusRead word w/ PEC

0x00

N

N

PMBUS_REVISION

98h

TelemetryPMBus® Specifications Part I and II rev

1.3

Read byte w/ PEC

0x33

Y

N

MFR_ID

99h

Telemetry

Manufacturer name

Block read 2 bytes w/ PEC

"TI"

Y

N

MFR_MODEL

9Ah

TelemetryDevice nameBlock read 8 bytes w/ PEC

"TPS1689x"

Y

N

MFR_REVISION

9Bh

Telemetry

Device revision

Block read 1 byte w/ PEC

0x01

Y

N

READ_VIN

88h

TelemetryInput voltageRead word w/ PECUndefined

N

N

READ_VOUT

8Bh

TelemetryOutput voltageRead word w/ PECUndefined

N

N

READ_IIN

89h

Telemetry

Input current

Read word w/ PECUndefined

N

N

READ_TEMPERATURE_1

8Dh

TelemetryDevice temperatureRead word w/ PECUndefined

N

N

READ_VAUX

D0h

Telemetry

Auxiliary analog input voltage

Read word w/ PECUndefined

N

N

READ_PIN

97h

Telemetry

Instantaneous input power

Read word w/ PECUndefined

N

N

READ_EIN

86h

Telemetry

Accumulated input energy

Block read 6 bytes w/ PECUndefined

N

N

READ_VIN_AVG

DCh

Telemetry

Average input voltage

Read word w/ PECUndefined

N

N

READ_VIN_MIN

D1h

TelemetryMinimum input voltageRead word w/ PECUndefined

N

N

READ_VIN_PEAK

D2h

TelemetryPeak input voltageRead word w/ PECUndefined

N

Y

READ_VOUT_AVG

DDh

TelemetryAverage output voltageRead word w/ PECUndefined

N

N

READ_VOUT_MIN

DAh

TelemetryMinimum output voltageRead word w/ PECUndefined

N

N

READ_IIN_AVG

DEh

Telemetry

Average input current

Read word w/ PECUndefined

N

N

READ_IIN_PEAK

D4h

Telemetry

Peak input current

Read word w/ PECUndefined

N

Y

READ_TEMP_AVG

D6h

Telemetry

Average device temperature

Read word w/ PECUndefined

N

N

READ_TEMP_PEAK

D7h

Telemetry

Peak device temperature

Read word w/ PECUndefined

N

Y

READ_PIN_AVG

DFh

TelemetryAverage input powerRead word w/ PECUndefined

N

N

READ_PIN_PEAK

D5h

Telemetry

Peak input power

Read word w/ PECUndefined

N

N

READ_SAMPLE_BUF

D8h

Telemetry

ADC sample buffer

Block read 64 bytes w/ PECUndefined

N

N

READ_BB_RAM

FDh

Telemetry

Blackbox RAM registers

Block read 7 bytes w/ PECUndefined

N

Y

READ_BB_EEPROM

F4h

Telemetry

Blackbox EEPROM content

Block read 16 bytes w/ PECUndefined

N

Y

BB_TIMER

FAh

Telemetry

Blackbox tick timer

Read byte w/ PECUndefined

N

Y

PMBUS_ADDR

FBh

Configuration

PMBus® device address for ADDR0 = Open and ADDR1 = Open setting

Read/write byte w/ PEC

0x40

Y

Y

VIN_UV_WARN

58h

ConfigurationInput undervoltage warning thresholdRead/write word w/ PEC

0x0020

N

N

VIN_UV_FLT

59h

ConfigurationInput undervoltage fault thresholdRead/write word w/ PEC

0x001F

Y

Y

VIN_OV_WARN

57h

ConfigurationInput overvoltage warning thresholdRead/write word w/ PEC

0x00A4

N

N

VIN_OV_FLT

55h

ConfigurationInput overvoltage fault thresholdRead/write word w/ PEC

0x00AF

Y

Y

VOUT_UV_WARN43hConfigurationOutput undervoltage warning thresholdRead/write word w/ PEC

0x0020

N

N

VOUT_PGTH

5Fh

ConfigurationOutput threshold for Power Good de-assertion Read/write word w/ PEC

0x001D

Y

Y

OT_WARN

51h

ConfigurationOvertemperature warning thresholdRead/write word w/ PEC

0x007C

N

N

OT_FLT

4Fh

ConfigurationOvertemperature fault thresholdRead/write word w/ PEC

0x0084

Y

Y

PIN_OP_WARN

6Bh

ConfigurationInput overpower warning thresholdRead/write word w/ PEC

0x0055

N

N

IIN_OC_WARN

5Dh

ConfigurationInput overcurrent warning thresholdRead/write word w/ PEC

0x007F

N

N

VIREF

E0h

Configuration

Reference voltage for current regulation and protection blocks

Read/write byte w/ PEC

0x32

Y

Y

AUX/TEMP/EEDATA/EECLK/GPIOx configuration

E1h

ConfigurationAUX/EEDATA/GPIO2 & AUX/EECLK/GPIO1 pin configurationRead/write byte w/ PEC

0x00

Y

Y

SMBA_FLT_CONFIG

E2h

ConfigurationSMBA/FLT pin configurationRead/write byte w/ PEC

0x00

Y

Y

ALERT_MASK

DBh

ConfigurationSMB Alert assertion maskRead/write word w/ PEC

0x0100

N

N

FAULT_MASK

E3h

ConfigurationFLT assertion maskRead/write word w/ PEC

0x0000

Y

Y

DEVICE_CONFIG

E4h

ConfigurationDevice configurationRead/write word w/ PEC

0x1400

Y

Y

BB_CONFIG

E5h

ConfigurationBlackbox configurationRead/write byte w/ PEC

0x00

Y

Y

OC_TIMER

E6h

ConfigurationTransient overcurrent blanking timerRead/write byte w/ PEC

0x14

N

N

RETRY_CONFIG

E7h

Configuration

Auto-retry configuration

Read/write byte w/ PEC

0x84

Y

Y

ADC_CONFIG_1

E8h

ConfigurationADC ConfigurationRead/write byte w/ PEC

0x00

N

N

ADC_CONFIG_2

E9h

ConfigurationADC ConfigurationRead/write byte w/ PEC

0x00

N

N

PK_MIN_AVG

EAh

ConfigurationPeak/Min/Average configurationRead/write byte w/ PEC

0x00

N

N

PSU_VOLTAGE

ECh

Configuration

PSU nominal voltage

Read/write byte w/ PEC

0xA3

N

N

INS_DLY

F9h

Configuration

Insertion delay

Read/write byte w/ PEC

0x00

Y

Y

IMON OFFSET CALIBRATIONF2hConfigurationConfiguration for IMON offsetRead/write byte0x00YY
LOAD_IMON_OFFSETCAh

Control

NA0x00YY