SLUSCT1B June   2017  – January 2019 TPS53681

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1. 3.1 Simplified Application
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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  Supply: Currents, UVLO, and Power-On Reset
    6. 6.6  References: DAC and VREF
    7. 6.7  Voltage Sense: AVSP and BVSP, AVSN and BVSN
    8. 6.8  Telemetry
    9. 6.9  Input Current Sensing
    10. 6.10 Programmable Loadline Settings
    11. 6.11 Current Sense and Calibration
    12. 6.12 Logic Interface Pins: AVR_EN, AVR_RDY, BVR_EN, BVR_RDY, RESET, VR_FAULT, VR_HOT
    13. 6.13 I/O Timing
    14. 6.14 PMBus Address Setting
    15. 6.15 Overcurrent Limit Thresholds
    16. 6.16 Switching Frequency
    17. 6.17 Slew Rate Settings
    18. 6.18 Ramp Selections
    19. 6.19 Dynamic Integration and Undershoot Reduction
    20. 6.20 Boot Voltage and TMAX Settings
    21. 6.21 Protections: OVP and UVP
    22. 6.22 Protections: ATSEN and BTSEN Pin Voltage Levels and Fault
    23. 6.23 PWM: I/O Voltage and Current
    24. 6.24 Dynamic Phase Add and Drop
    25. 6.25 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 Phase Interleaving and PWM Operation
        1. 7.3.1.1 Setting the Load-Line (DROOP)
        2. 7.3.1.2 Load Transitions
          1. 7.3.1.2.1 VID Table
        3. 7.3.1.3 Temperature and Fault Sensing
        4. 7.3.1.4 AutoBalance™ Current Sharing
        5. 7.3.1.5 Phase Configuration for Channel B
        6. 7.3.1.6 RESET Function
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1  PMBus Connections
      2. 7.5.2  PMBus Address Selection
      3. 7.5.3  Supported Commands
      4. 7.5.4  Commonly Used PMBus Commands
      5. 7.5.5  Voltage, Current, Power, and Temperature Readings
        1. 7.5.5.1 (88h) READ_VIN
          1. Table 6. READ_VIN Register Field Descriptions
        2. 7.5.5.2 (89h) READ_IIN
          1. Table 7. READ_IIN Register Field Descriptions
        3. 7.5.5.3 (8Bh) READ_VOUT
          1. Table 8. READ_VOUT Register Field Descriptions
        4. 7.5.5.4 (8Ch) READ_IOUT
          1. Table 9. READ_IOUT Register Field Descriptions
        5. 7.5.5.5 (8Dh) READ_TEMPERATURE_1
          1. Table 10. READ_TEMPERATURE_1 Register Field Descriptions
        6. 7.5.5.6 (96h) READ_POUT
          1. Table 11. READ_POUT Register Field Descriptions
        7. 7.5.5.7 (97h) READ_PIN
          1. Table 12. READ_PIN Register Field Descriptions
        8. 7.5.5.8 (D4h) MFR_SPECIFIC_04
          1. Table 13. MFR_SPECIFIC_04 Register Field Descriptions
      6. 7.5.6  Input Current Sense and Calibration
        1. 7.5.6.1 Measured Input Current Calibration
        2. 7.5.6.2 (DAh) MFR_SPECIFIC_10
          1. Table 15. MFR_SPECIFIC_10 Register Field Descriptions
        3. 7.5.6.3 (DCh) MFR_SPECIFIC_12
          1. Table 17. MFR_SPECIFIC_12 Register Field Descriptions
      7. 7.5.7  Output Current Sense and Calibration
        1. 7.5.7.1 Reading Individual Phase Currents
          1. 7.5.7.1.1 Reading Total Current
          2. 7.5.7.1.2 Calibrating Current Measurements
        2. 7.5.7.2 (38h) IOUT_CAL_GAIN
          1. Table 20. IOUT_CAL_GAIN Register Field Descriptions
        3. 7.5.7.3 (39h) IOUT_CAL_OFFSET
          1. Table 22. IOUT_CAL_OFFSET Register Field Descriptions
      8. 7.5.8  Output Voltage Margin Testing
        1. 7.5.8.1 (01h) OPERATION
          1. Table 25. OPERATION Register Field Descriptions
        2. 7.5.8.2 (21h) VOUT_COMMAND
          1. Table 26. VOUT_COMMAND Register Field Descriptions
        3. 7.5.8.3 (26h) VOUT_MARGIN_LOW
          1. Table 27. VOUT_MARGIN_LOW Register Field Descriptions
        4. 7.5.8.4 (25h) VOUT_MARGIN_HIGH
          1. Table 28. VOUT_MARGIN_HIGH Register Field Descriptions
      9. 7.5.9  Loop Compensation
        1. 7.5.9.1 (D7h) MFR_SPECIFIC_07
          1. Table 29. MFR_SPECIFIC_07 Register Field Descriptions
        2. 7.5.9.2 (28h) VOUT_DROOP
          1. Table 34. VOUT_DROOP Register Field Descriptions
      10. 7.5.10 Converter Protection and Response
      11. 7.5.11 Output Overvoltage Protection and Response
        1. 7.5.11.1 (40h) VOUT_OV_FAULT_LIMIT
          1. Table 37. VOUT_OV_FAULT_LIMIT Register Field Descriptions
        2. 7.5.11.2 (41h) VOUT_OV_FAULT_RESPONSE
          1. Table 38. VOUT_OV_FAULT_RESPONSE Register Field Descriptions
      12. 7.5.12 Maximum Allowed Output Voltage Setting
        1. 7.5.12.1 (24h) VOUT_MAX
          1. Table 39. VOUT_MAX Register Field Descriptions
      13. 7.5.13 Output Undervoltage Protection and Response
        1. 7.5.13.1 (44h) VOUT_UV_FAULT_LIMIT
          1. Table 40. VOUT_UV_FAULT_LIMIT Register Field Descriptions
        2. 7.5.13.2 (45h) VOUT_UV_FAULT_RESPONSE
          1. Table 41. VOUT_UV_FAULT_RESPONSE Register Field Descriptions
      14. 7.5.14 Minimum Allowed Output Voltage Setting
        1. 7.5.14.1 (2Bh) VOUT_MIN
          1. Table 42. VOUT_MIN Register Field Descriptions
      15. 7.5.15 Output Overcurrent Protection and Response
        1. 7.5.15.1 (46h) IOUT_OC_FAULT_LIMIT
          1. Table 43. IOUT_OC_FAULT_LIMIT Register Field Descriptions
        2. 7.5.15.2 (4Ah) IOUT_OC_WARN_LIMIT
          1. Table 44. IOUT_OC_WARN_LIMIT Register Field Descriptions
        3. 7.5.15.3 (47h) IOUT_OC_FAULT_RESPONSE
          1. Table 45. IOUT_OC_FAULT_RESPONSE Register Field Descriptions
      16. 7.5.16 Input Under-Voltage Lockout (UVLO)
        1. 7.5.16.1 (35h) VIN_ON
          1. Table 46. VIN_ON Register Field Descriptions
      17. 7.5.17 Input Over-Voltage Protection and Response
        1. 7.5.17.1 (55h) VIN_OV_FAULT_LIMIT
          1. Table 48. VIN_OV_FAULT_LIMIT Register Field Descriptions
        2. 7.5.17.2 (56h) VIN_OV_FAULT_RESPONSE
          1. Table 49. VIN_OV_FAULT_RESPONSE Register Field Descriptions
      18. 7.5.18 Input Undervoltage Protection and Response
        1. 7.5.18.1 (59h) VIN_UV_FAULT_LIMIT
          1. Table 50. VIN_UV_FAULT_LIMIT Register Field Descriptions
        2. 7.5.18.2 (5Ah) VIN_UV_FAULT_RESPONSE
          1. Table 52. VIN_UV_FAULT_RESPONSE Register Field Descriptions
      19. 7.5.19 Input Overcurrent Protection and Response
        1. 7.5.19.1 (5Bh) IIN_OC_FAULT_LIMIT
          1. Table 53. IIN_OC_FAULT_LIMIT Register Field Descriptions
        2. 7.5.19.2 (5Dh) IIN_OC_WARN_LIMIT
          1. Table 55. IIN_OC_FAULT_LIMIT Register Field Descriptions
        3. 7.5.19.3 (5Ch) IIN_OC_FAULT_RESPONSE
          1. Table 57. IIN_OC_FAULT_LIMIT Register Field Descriptions
      20. 7.5.20 Over-Temperature Protection and Response
        1. 7.5.20.1 (4Fh) OT_FAULT_LIMIT
          1. Table 58. OT_FAULT_LIMIT Register Field Descriptions
        2. 7.5.20.2 (51h) OT_WARN_LIMIT
          1. Table 59. OT_WARN_LIMIT Register Field Descriptions
        3. 7.5.20.3 (50h) OT_FAULT_RESPONSE
          1. Table 60. OT_FAULT_RESPONSE Register Field Descriptions
      21. 7.5.21 Dynamic Phase Shedding (DPS)
        1. 7.5.21.1 (DEh) MFR_SPECIFIC_14
          1. Table 61. MFR_SPECIFIC_14 Register Field Descriptions
        2. 7.5.21.2 (DFh) MFR_SPECIFIC_15
          1. Table 63. MFR_SPECIFIC_15 Register Field Descriptions
      22. 7.5.22 NVM Programming
      23. 7.5.23 NVM Security
        1. 7.5.23.1 (FAh) MFR_SPECIFIC_42
          1. Table 64. MFR_SPECIFIC_42 Register Field Descriptions
      24. 7.5.24 Black Box Recording
        1. 7.5.24.1 (D8h) MFR_SPECIFIC_08
          1. Table 65. MFR_SPECIFIC_08 Register Field Descriptions
      25. 7.5.25 Board Identification and Inventory Tracking
        1. 7.5.25.1 (9Ah) MFR_MODEL
          1. Table 67. MFR_MODEL Register Field Descriptions
        2. 7.5.25.2 (9Bh) MFR_REVISION
          1. Table 68. MFR_REVISION Register Field Descriptions
        3. 7.5.25.3 (9Dh) MFR_DATE
          1. Table 69. MFR_DATE Register Field Descriptions
      26. 7.5.26 Status Reporting
        1. 7.5.26.1 (78h) STATUS_BYTE
          1. Table 70. STATUS_BYTE Register Field Descriptions
        2. 7.5.26.2 (79h) STATUS_WORD
          1. Table 71. STATUS_WORD Register Field Descriptions
        3. 7.5.26.3 (7Ah) STATUS_VOUT
          1. Table 72. STATUS_VOUT Register Field Descriptions
        4. 7.5.26.4 (7Bh) STATUS_IOUT
          1. Table 73. STATUS_IOUT Register Field Descriptions
        5. 7.5.26.5 (7Ch) STATUS_INPUT
          1. Table 74. STATUS_INPUT Register Field Descriptions
        6. 7.5.26.6 (7Dh) STATUS_TEMPERATURE
          1. Table 75. STATUS_TEMPERATURE Register Field Descriptions
        7. 7.5.26.7 (7Eh) STATUS_CML
          1. Table 76. STATUS_CML Register Field Descriptions
        8. 7.5.26.8 (80h) STATUS_MFR_SPECIFIC
          1. Table 77. STATUS_MFR_SPECIFIC Register Field Descriptions
  8. 8 Applications, Implementation, and Layout
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 6-phase, 0.9-V, 300-A Application and 2-phase 0.8-V, 90-A Application
        1. 8.2.1.1 Schematic
        2. 8.2.1.2 Design Requirements
        3. 8.2.1.3 Detailed Design Procedure
          1. 8.2.1.3.1 Choose Inductor
          2. 8.2.1.3.2 Select the Per-Phase Valley Current Limit
          3. 8.2.1.3.3 Set the Maximum Temperature Level (TMAX)
          4. 8.2.1.3.4 Set USR Thresholds to Improve Load Transient Performance
        4. 8.2.1.4 Inductor DCR and Shunt Current Sensing Design for Input Power
          1. 8.2.1.4.1 Compensation Design
          2. 8.2.1.4.2 Set PMBus Addresses
        5. 8.2.1.5 Application Performance Plots
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Device Guidelines
      2. 10.1.2 Power Stage Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    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

7.5.3 Supported Commands

The table below summarizes the PMBus commands supported by the TPS53681. Only selected commands, which are most commonly used during device configuration and usage are reproduced in this document. For a full set of register maps for this device, refer to the accompanying Technical Reference Manual.

CMD Command Name Description R/W,
NVM		 Default Behavior Default Value
Ch. A
(PAGE 0)		 Ch. B
PAGE 1
00h PAGE Selects which channel subsequent PMBus commands address RW All commands address Channel A N/A
01h OPERATION Enable or disable each channel, enter or exit margin. RW Conversion disabled. Margin None. 00h 00h
02h ON_OFF_CONFIG Configure the combination of OPERATION, and enable pin required to enable power conversion for each channel. RW,
NVM		 OPERATION command only. 1Bh 1Bh
03h CLEAR_FAULT Clears all fault status registers to 00h and releases PMB_ALERT W Write-only N/A
04h PHASE Selects which phase of the active channel subsequent PMBus commands address RW Commands address all phases. FFh FFh
10h WRITE_PROTECT Used to control writing to the volatile operating memory (PMBus and restore from NVM). RW Writes to all commands are allowed 00h
11h STORE_DEFAULT_ALL Stores all current storable register settings into NVM as new defaults. W Write-only N/A
12h RESTORE_DEFAULT_ALL Restores all storable register settings from NVM. W Write-only N/A
19h CAPABILITY Provides a way for a host system to determine key PMBus capabilities of the device. R 1 MHz, PEC, PMB_ALERT Supported D0h
1Bh SMBALERT_MASK
(STATUS_VOUT)		 Selects which faults/status bits may to assert PMB_ALERT RW,
NVM		 All bits may assert PMB_ALERT 00h 00h
1Bh SMBALERT_MASK
(STATUS_IOUT)		 Selects which faults/status bits may to assert PMB_ALERT RW,
NVM		 All bits may assert PMB_ALERT 00h 00h
1Bh SMBALERT_MASK
(STATUS_INPUT)		 Selects which faults/status bits may to assert PMB_ALERT RW,
NVM		 LOW_VIN does not assert PMB_ALERT 08h 08h
1Bh SMBALERT_MASK
(STATUS_TEMPERATURE)		 Selects which faults/status bits may to assert PMB_ALERT RW,
NVM		 All bits may assert PMB_ALERT 00h 00h
1Bh SMBALERT_MASK
(STATUS_CML)		 Selects which faults/status bits may to assert PMB_ALERT RW,
NVM		 All bits may assert PMB_ALERT 00h 00h
1Bh SMBALERT_MASK
(STATUS_MFR_SPECIFIC)		 Selects which faults/status bits may to assert PMB_ALERT RW,
NVM		 All bits may assert PMB_ALERT 00h 00h
20h VOUT_MODE Read-only output mode indicator R(1) VID mode.
5 mV Step (Ch A),
5 mV Step (Ch B)		 21h 21h
21h VOUT_COMMAND Output voltage target. RW,
NVM		 0.500 V (Ch A)
0.500 V (Ch B)		 0033h 0033h
24h VOUT_MAX Sets the maximum output voltage RW,
NVM		 1.520 V (Ch A)
1.520 V (Ch B)		 00FFh 00FFh
25h VOUT_MARGIN_HIGH Load the unit with the voltage to which the output is to be changed when OPERATION command is set to “Margin High”. RW 0.000 V (CH A)
0.000 V (Ch B)		 0000h 0000h
26h VOUT_MARGIN_LOW Load the unit with the voltage to which the output is to be changed when OPERATION command is set to “Margin Low”. RW 0.000 V (CH A)
0.000 V (Ch B)		 0000h 0000h
27h VOUT_TRANSITION_RATE Used to set slew rate settings for output voltage updates RW,
NVM		 1.5625 mV/µs (Ch A)
1.5625 mV/µs (Ch B)		 E019h E019h
28h VOUT_DROOP The VOUT_DROOP sets the rate, in mV/A (mΩ) at which the output voltage decreases (or increases) with increasing (or decreasing) output current for use with Adaptive Voltage Positioning RW,
NVM		 0.000 mΩ (Ch A)
0.000 mΩ (Ch B)		 D000h D000h
29h VOUT_SCALE_LOOP Used for scaling the VID code RW,
NVM		 1.000 (Ch A)
1.000 (Ch B)		 E808h E808h
2Ah VOUT_SCALE_MONITOR Used for scaling output voltage telemetry RW,
NVM		 1.000 (Ch A)
1.000 (Ch B)		 E808h E808h
2Bh VOUT_MIN Sets the minimum output voltage RW,
NVM		 0.000 V (Ch A)
0.000 V (Ch B)		 0000h 0000h
33h FREQUENCY_SWITCH Sets the switching frequency RW,
NVM		 500 kHz (Ch A)
500 kHz (Ch B)		 01F4h 01F4h
35h VIN_ON Sets value of input voltage at which the device should start power conversion. RW,
NVM		 6.25 V F019h
38h IOUT_CAL_GAIN Sets the ratio of voltage at the current sense pins to the sensed current. RW,
NVM		 5.000 mΩ (Ch A)
5.000 mΩ (Ch B)		 D140h D140h
39h IOUT_CAL_OFFSET Used to null offsets in the output current sensing circuit RW,
NVM		 0.000 A (Ch A)
0.000 A (Ch B)
(All Phases)		 E800h E800h
40h VOUT_OV_FAULT_LIMIT Sets the value of the sensed output voltage which triggers an output overvoltage fault R 1.520 V (Ch A)
1.520 V (Ch B)		 00FFh 00FFh
41h VOUT_OV_FAULT_RESPONSE Sets the converter response to an output overvoltage event R Shutdown, do not restart 80h 80h
44h VOUT_UV_FAULT_LIMIT Sets the value of the sensed output voltage which triggers an output undervoltage fault R 0.000 V (Ch A)
0.000 V (Ch B)		 0000h 0000h
45h VOUT_UV_FAULT_RESPONSE Sets the converter response to an output undervoltage event RW,
NVM		 Shutdown, do not restart 80h 80h
46h IOUT_OC_FAULT_LIMIT Sets the output Over Current fault limit RW,
NVM(1) 		39 A (Ch A)
39 A (Ch B)		 0027h 0027h
47h IOUT_OC_FAULT_RESPONSE Define the over-current fault response. RW,
NVM		 Shutdown, and Hiccup FAh FAh
4Ah IOUT_OC_WARN_LIMIT Sets the value of the output current that causes the over current detector to indicate an over current warning. RW,
NVM(1) 		26 A (Ch A)
26 A (Ch B)		 001Ah 001Ah
4Fh OT_FAULT_LIMIT Sets the temperature, in degrees Celsius, of the unit at which it should indicate an Over temperature Fault. RW,
NVM(1) 		135 °C (Ch A)
135 °C (Ch B)		 0087h 0087h
50h OT_FAULT_RESPONSE Sets the converter response to an over temperature fault. RW,
NVM		 Shutdown, do not restart 80h 80h
51h OT_WARN_LIMIT Sets the temperature, in degrees Celsius, of the unit at which it should indicate an Over temperature warning. RW 105 °C (Ch A)
105 °C (Ch B)		 0069h 0069h
55h VIN_OV_FAULT_LIMIT Set the voltage, in volts, of the unit at which it should indicate a Vin Over-voltage Fault. RW,
NVM		 14.000 V 000Eh
56h VIN_OV_FAULT_RESPONSE Instructs the device on what action to take in response to an input overvoltage fault. R Continue Uninterrupted 00h
59h VIN_UV_FAULT_LIMIT Sets the value of the input voltage that causes an Input Under voltage Fault RW,
NVM		 5.500 V F80Bh
5Ah VIN_UV_FAULT_RESPONSE Sets the converter response to an input undervoltage event R Shutdown, do not restart C0h
5Bh IIN_OC_FAULT_LIMIT Sets the value in amperes that causes the over current fault condition of the input current RW,
NVM		 63.5 A F87Fh
5Ch IIN_OC_FAULT_RESPONSE Sets the converter response to input overcurrent events R Shutdown, do not restart C0h
5Dh IIN_OC_WARN_LIMIT Sets the value in amperes that causes the over current warning condition of the input current RW,
NVM		 63.5 A F87Fh
60h TON_DELAY Sets the time, in milliseconds, from when a start condition is received (as programmed by the ON_OFF_CONFIG command) until the output voltage starts to rise. RW,
NVM		 2.43 ms (Ch A)
2.43 ms (Ch B)		 C26Eh C26Eh
6Bh PIN_OP_WARN_LIMIT The PIN_OP_WARN_LIMIT command sets the value of the input power, in watts, that causes a warning that the input power is high RW 450 W 08E1h
78h STATUS_BYTE PMBus read-only status and flag bits. RW Current Status N/A N/A
79h STATUS_WORD PMBus read-only status and flag bits. RW Current Status N/A N/A
7Ah STATUS_VOUT PMBus read-only status and flag bits. RW Current Status N/A N/A
7Bh STATUS_IOUT PMBus read-only status and flag bits. RW Current Status N/A N/A
7Ch STATUS_INPUT PMBus read-only status and flag bits. RW Current Status N/A
7Dh STATUS_TEMPERATURE PMBus read-only status and flag bits. RW Current Status N/A N/A
7Eh STATUS_CML PMBus read-only status and flag bits. RW Current Status N/A
80h STATUS_MFR_SPECIFIC PMBus read-only status and flag bits. RW Current Status N/A N/A
88h READ_VIN Returns the input voltage in volts R Current Status N/A
89h READ_IIN Returns the input current in amperes R Current Status N/A
8Bh READ_VOUT Returns the output voltage in VID format R Current Status N/A N/A
8Ch READ_IOUT Returns the output current in amperes R Current Status N/A N/A
8Dh READ_TEMPERATURE_1 Returns the highest power stage temperature in °C R Current Status N/A N/A
96h READ_POUT Returns the output power in Watts R Current Status N/A N/A
97h READ_PIN Returns the input power in Watts R Current Status N/A
98h PMBUS_REVISION Returns the version of the PMBus specification to which this device complies R PMBus 1.3
Part I, Part II		 33h
99h MFR_ID Loads the unit with bits that contain the manufacturer’s ID RW,
NVM		 Arbitrary NVM for user 0000h
9Ah MFR_MODEL Loads the unit with bits that contain the manufacturer’s model number RW,
NVM		 Arbitrary NVM for user 0000h
9Bh MFR_REVISION Loads the unit with bits that contain the manufacturer’s model revision RW,
NVM		 Arbitrary NVM for user 0400h
9Dh MFR_DATE Loads the unit with bits that contain the manufacture date RW,
NVM		 March 2017 1103h
9Eh MFR_SERIAL NVM Checksum R NVM checksum 484D2979h
ADh IC_DEVICE_ID Returns a number indicating the part number of the device R TPS53681 81h
AEh IC_DEVICE_REV Returns a number indicating the device revision R Rev 1.0 00h
B0h USER_DATA_00 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B1h USER_DATA_01 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B2h USER_DATA_02 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B3h USER_DATA_03 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B4h USER_DATA_04 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B5h USER_DATA_05 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B6h USER_DATA_06 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B7h USER_DATA_07 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B8h USER_DATA_08 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
B9h USER_DATA_09 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
BAh USER_DATA_10 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
BBh USER_DATA_11 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
BCh USER_DATA_12 Used for batch NVM programming. RW
NVM		 Current configuration Factory Default Settings
D0h MFR_SPECIFIC_00 Configures per-phase overcurrent levels, current share thresholds, and other miscellaneous settings. RW
NVM		 Misc. configuration,
See register maps		 0006h 3006h
D3h MFR_SPECIFIC_03 Returns information regarding current imbalance warnings for each phase R Current status N/A N/A
D4h MFR_SPECIFIC_04 Returns the output voltage for the active channel, in linear format R Current status N/A N/A
D5h MFR_SPECIFIC_05 Used to trim the output voltage of the active channel, by applying an offset to the currently selected VID code. RW
NVM		 0 mV offset
(Ch A and Ch B)		 00h 00h
D6h MFR_SPECIFIC_06 Configures dynamic load line options for both channels, and selects Auto-DCM operation. RW
NVM		 Misc. configuration,
See register maps		 0000h 0000h
D7h MFR_SPECIFIC_07 Configures the internal loop compensation for both channels. RW
NVM		 Misc. configuration,
See to register maps		 118Fh 118Fh
D8h MFR_SPECIFIC_08 Used to identify catastrophic faults which occur first, and store this information to NVM RW
NVM		 Current status 00h 00h
D9h MFR_SPECIFIC_09 Used to configure non-linear transient performance enhancements such as undershoot reduction (USR) RW
NVM		 Misc. configuration,
See register maps		 76C7h 06C7h
DAh MFR_SPECIFIC_10 Used to configure input current sensing, and set the maximum output current RW
NVM		 Misc. configuration,
See register maps		 C81Ah 001Ah
DBh MFR_SPECIFIC_11 Boot-up VID code for each channel RW
NVM		 VID 51d (Ch A)
VID 51d (Ch B)		 33h 33h
DCh MFR_SPECIFIC_12 Used to configure input current sensing and other miscellaneous settings RW
NVM		 Misc. configuration,
See register maps		 C704h 0700h
DDh MFR_SPECIFIC_13 Used to configure output voltage slew rates, DAC stepsize, and other miscellaneous settings. RW
NVM		 Misc. configuration,
See register maps		 8825h 0025h
DEh MFR_SPECIFIC_14 Used to configure dynamic phase shedding, and compensation ramp amplitude, and dynamic ramp amplitude during USR, and different power states RW
NVM		 Misc. configuration,
See register maps		 0005h 0005h
DFh MFR_SPECIFIC_15 Used to configure dynamic phase shedding. RW
NVM		 Misc. configuration,
See register maps		 1FFAh 0000h
E4h MFR_SPECIFIC_20 Used to set the maximum operational phase number, on-the-fly. RW
NVM		 Misc. configuration,
See register maps		 Hardware Configured
F0h MFR_SPECIFIC_32 Used to set the input over-power warning RW 450 W 00E1h
FAh MFR_SPECIFIC_42 NVM Security RW
NVM		 NVM Security Key 0000h
(1) NVM-backed bits in the MFR_SPECIFIC or USER_DATA commands affect the reset value of these commands. Refer to the individual register maps for more detail.