SLUSBO6C JANUARY   2014  – October 2018 TPS40425

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1. 3.1 Simplified Application Diagram (Dual Output)
  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 Handling 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  Asynchronous Pulse Injection (API)
      2. 7.3.2  Adaptive Voltage Scaling (AVS)
      3. 7.3.3  Switching Frequency and Synchronization
      4. 7.3.4  Voltage Reference
      5. 7.3.5  Output Voltage and Remote Sensing Amplifier
      6. 7.3.6  Current Sensing and Temperature Sensing Modes
        1. 7.3.6.1 Non Smart-Power Operation
        2. 7.3.6.2 Smart-Power Operation.
      7. 7.3.7  Current Sensing
      8. 7.3.8  Temperature Sensing
      9. 7.3.9  Current Sharing
      10. 7.3.10 Linear Regulators
      11. 7.3.11 Power Sequence Between TPS40425 Device and Power Stage
      12. 7.3.12 PWM Signal
        1. 7.3.12.1 PWM Behavior During Soft-start Operation
      13. 7.3.13 Startup and Shutdown
      14. 7.3.14 Pre-Biased Output Start-up
      15. 7.3.15 PGOOD Indication
      16. 7.3.16 Overcurrent Protection
      17. 7.3.17 Overvoltage/Undervoltage Protection
      18. 7.3.18 Overtemperature Fault Protection
      19. 7.3.19 Input Undervoltage Lockout (UVLO)
      20. 7.3.20 Fault Communication
      21. 7.3.21 Fault Protection Summary
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1 Multi-Phase Applications
    6. 7.6 Register Maps
      1. 7.6.1 PMBus General Description
      2. 7.6.2 PMBus Functionality
        1. 7.6.2.1 PMBus Address
        2. 7.6.2.2 PMBus Connections
        3. 7.6.2.3 PMBus Data Format
        4. 7.6.2.4 PMBus Output Voltage Adjustment
          1. 7.6.2.4.1 No Margin Voltage
          2. 7.6.2.4.2 Margin High Voltage State
          3. 7.6.2.4.3 Margin Low State
      3. 7.6.3 Reading the Output Current
      4. 7.6.4 Soft-Start Time
      5. 7.6.5 Turn-On/Turn-Off Delay and Sequencing
    7. 7.7 Supported PMBus Commands
      1. 7.7.1  PAGE (00h)
      2. 7.7.2  OPERATION (01h)
      3. 7.7.3  ON_OFF_CONFIG (02h)
      4. 7.7.4  CLEAR_FAULTS (03h)
      5. 7.7.5  WRITE_PROTECT (10h)
      6. 7.7.6  STORE_USER_ALL (15h)
      7. 7.7.7  RESTORE_USER_ALL (16h)
      8. 7.7.8  CAPABILITY (19h)
      9. 7.7.9  VOUT_MODE (20h)
      10. 7.7.10 VIN_ON (35h)
      11. 7.7.11 VIN_OFF (36h)
      12. 7.7.12 IOUT_CAL_GAIN (38h)
      13. 7.7.13 IOUT_CAL_OFFSET (39h)
      14. 7.7.14 IOUT_OC_FAULT_LIMIT (46h)
      15. 7.7.15 IOUT_OC_FAULT_RESPONSE (47h)
      16. 7.7.16 IOUT_OC_WARN_LIMIT (4Ah)
      17. 7.7.17 OT_FAULT_LIMIT (4Fh)
      18. 7.7.18 OT_WARN_LIMIT (51h)
      19. 7.7.19 TON_RISE (61h)
      20. 7.7.20 STATUS_BYTE (78h)
      21. 7.7.21 STATUS_WORD (79h)
      22. 7.7.22 STATUS_VOUT (7Ah)
      23. 7.7.23 STATUS_IOUT (7Bh)
      24. 7.7.24 STATUS_TEMPERATURE (7Dh)
      25. 7.7.25 STATUS_CML (7Eh)
      26. 7.7.26 STATUS_MFR_SPECIFIC (80h)
      27. 7.7.27 READ_VOUT (8Bh)
      28. 7.7.28 READ_IOUT (8Ch)
      29. 7.7.29 READ_TEMPERATURE_2 (8Eh)
      30. 7.7.30 PMBus_REVISION (98h)
      31. 7.7.31 MFR_SPECIFIC_00 (D0h)
      32. 7.7.32 MFR_SPECIFIC_04 (VREF_TRIM) (D4h)
      33. 7.7.33 MFR_SPECIFIC_05 (STEP_VREF_MARGIN_HIGH) (D5h)
      34. 7.7.34 MFR_SPECIFIC_06 (STEP_VREF_MARGIN_LOW) (D6h)
      35. 7.7.35 MFR_SPECIFIC_07 (PCT_VOUT_FAULT_PG_LIMIT) (D7h)
      36. 7.7.36 MFR_SPECIFIC_08 (SEQUENCE_TON_TOFF_DELAY) (D8h)
      37. 7.7.37 MFR_SPECIFIC_16 (COMM_EEPROM_SPARE) (E0h)
      38. 7.7.38 MFR_SPECIFIC_21 (OPTIONS) (E5h)
      39. 7.7.39 MFR_SPECIFIC_22 (PWM_OSC_SELECT) (E6h)
      40. 7.7.40 MFR_SPECIFIC_23 (MASK SMBALERT) (E7h)
      41. 7.7.41 MFR_SPECIFIC_25 (AVS_CONFIG) (E9h)
      42. 7.7.42 MFR_SPECIFIC_26 (AVS_ADDRESS) (EAh)
      43. 7.7.43 MFR_SPECIFIC_27 (AVS_DAC_DEFAULT) (EBh)
      44. 7.7.44 MFR_SPECIFIC_28 (AVS_CLAMP_HI) (ECh)
      45. 7.7.45 MFR_SPECIFIC_29 (AVS_CLAMP_LO) (EDh)
      46. 7.7.46 MFR_SPECIFIC_30 (TEMP_OFFSET) (EEh)
      47. 7.7.47 MFR_SPECIFIC_32 (API_OPTIONS) (F0h)
      48. 7.7.48 MFR_SPECIFIC_44 (DEVICE_CODE) (FCh)
  8. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Dual-Output Application
      2. 8.2.2 Design Requirements
      3. 8.2.3 Design Procedure
        1. 8.2.3.1  Switching Frequency Selection
        2. 8.2.3.2  Inductor Selection
        3. 8.2.3.3  Output Capacitor Selection
          1. 8.2.3.3.1 Output Voltage Deviation During Load Transient
          2. 8.2.3.3.2 Output Voltage Ripple
        4. 8.2.3.4  Input Capacitor Selection
        5. 8.2.3.5  VDD, BP5, BP3 Bypass Capacitor
        6. 8.2.3.6  R-C Snubber
        7. 8.2.3.7  Current and Temperature Sensor
        8. 8.2.3.8  Power Sequence Between the TPS40425 Device and Power Stage
        9. 8.2.3.9  Output Voltage Setting and Frequency Compensation Selection
        10. 8.2.3.10 Key PMBus Parameter Selection
          1. 8.2.3.10.1 MFR_SPECIFIC_21 (OPTIONS)
            1. 8.2.3.10.1.1 IOUT_CAL_GAIN
            2. 8.2.3.10.1.2 Enable and UVLO
            3. 8.2.3.10.1.3 Soft-Start Time
            4. 8.2.3.10.1.4 Overcurrent Threshold and Response
      4. 8.2.4 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Layout Guidelines for TPS40425 Device
      2. 10.1.2 Layout Guidelines for Power Stage Device
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Texas Instruments Fusion Digital Power Designer
        2. 11.1.1.2 TPS40k Loop Compensation Tool
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.7 Supported PMBus Commands

The TPS40425 device supports the following commands from the PMBus 1.1 specification.

Table 8. PMBus Factory Default Setting

CODE COMMAND NAME WORD/BYTE DESCRIPTION: PMBus Command USER
WRITABLE 		FACTORY DEFAULT VALUE
00h PAGE Byte Locates separate PMBus command lists in multiple output environments Yes 0XXX XXX0
01h OPERATION Byte Turn the unit on and off in conjunction with the input from the CONTROL pin. Set the output voltage to the upper or lower MARGIN VOLTAGES. Yes 0X00 00XX
02h ON_OFF_CONFIG Byte Configures the combination of CONTROL pin input and serial bus commands needed to turn the unit on and off. This includes how the unit responds when power is applied. Yes XXX1 0110
03h CLEAR_FAULTS Byte Clears all fault status registers to 0x00. The "Unit is Off" bit in the status byte is not cleared when this command is issued. Yes(1) NONE
10h WRITE_PROTECT Byte Prevents unwanted writes to the device. Yes 000X XXXX
15h STORE_USER_ALL Byte Saves the current configuration into the User Store. Note: This command writes to Non-Volatile Memory. Yes(1) NONE
16h RESTORE_USER_ALL Byte Restores all parameters to the settings saved in the User Store. Yes(1) NONE
19h CAPABILITY Byte PEC,SPD,ALRT No 1011 0000
20h VOUT_MODE Byte Read-Only Mode Indicator. The data format is linear with an exponent of -9 No 0001 0111
35h VIN_ON Word Sets the value of the input voltage at which the unit should start power conversion Yes 1111 0000 0001 0001
36h VIN_OFF Word Sets the value of the input voltage at which the unit should stop power conversion. Yes 1111 0000 0001 0000
38h IOUT_CAL_GAIN Word Sets the ratio of the voltage at the current sense pins to the sensed current. Yes 1000 0000 0010 0001
39h IOUT_CAL_OFFSET Word Nulls any offsets in the output current sensing circuit. Yes 1110 0000 0000 0000
46h IOUT_OC_FAULT_LIMIT Word Sets the value of the output current, in amperes, that causes the overcurrent detector to indicate an overcurrent fault condition. Yes 1111 1000 0011 1100
47h IOUT_OC_FAULT_RESPONSE Byte Instructs the device on what action to take in response to an output overcurrent fault. Yes 0011 1111
4Ah IOUT_OC_WARN_LIMIT Word Sets the value of the output current that casues an output overcurrent warning. Yes 1111 1000 0011 0110
4Fh OT_FAULT_LIMIT Word Overtemperature Fault Threshold Yes 0000 0000 0111 1101
5Ih OT_WARN_LIMIT Word Overtemperature Warning Threshold Yes 0000 0000 0110 0100
61h TON_RISE Word Target Soft-Start Rise Time Yes 1110 0000 0010 1011
78h STATUS_BYTE Byte Single byte status indicator No 0x00 0000
79h STATUS_WORD Word Full 2-byte status indicator No 0000 0000 0x00 0000
7Ah STATUS_VOUT Byte Output Voltage Fault Status Detail No 0000 0000
7Bh STATUS_IOUT Byte Output Current Fault Status Detail No 0000 0000
7Dh STATUS_TEMPERATURE Byte Temperature Fault Status Detail No 0000 0000
7Eh STATUS_CML Byte Communication, Memory, and Logic Fault Status Detail No 0000 0000
80h STATUS_MFR_SPECIFIC Byte Manufacturer Specific Fault Status Detail. No 0000 0000
8Bh READ_VOUT Word Read output voltage No 0000 0000 0000 0000
8Ch READ_IOUT Word Read output current No 1110 0000 0000 0000
8Eh READ_TEMPERATURE_2 Word Read off-chip temp sensor No 1111 0000 0110 0100
98h PMBUS_REVISION Byte PMBus Revision Information No 0001 0001
D0h MFR_SPECIFIC_00 Word User scratch pad Yes 0000 0000 0000 0000
D4h MFR_SPECIFIC_04 Word VREF_TRIM Yes 0000 0000 0000 0000
D5h MFR_SPECIFIC_05 Word STEP_VREF_MARGIN_HIGH Yes 0000 0000 0001 1110
D6h MFR_SPECIFIC_06 Word STEP_VREF_MARGIN_LOW Yes 1111 1111 1110 0010
D7h MFR_SPECIFIC_07 Byte PCT_VOUT_FAULT_PG_LIMIT Yes XXXX XX00
D8h MFR_SPECIFIC_08 Byte SWQUENCE_TON_TOFF_DELAY Yes 000X 000X
E0h MFR_SPECIFIC_16 Word COMM_EEPROM_SPARE Yes 0011 xxxx xxxx xxxx
E5h MFR_SPECIFIC_21 Word IC options Yes 0111 1100 0000 0000
E6h MFR_SPECIFIC_22 Word PWM_OSC_SELECT Yes 0000 0000 0000 0000
E7h MFR_SPECIFIC_23 Word Paged and Common MASK_SMBALERT Yes 0000 0000 0000 0000
E9h MFR_SPECIFIC_25 Word AVS_CONFIG Yes 0000 0000 0000 0010
EAh MFR_SPECIFIC_26 Word AVS_ADDRESS Yes 0000 0000 0000 0101
EBh MFR_SPECIFIC_27 Word AVS_DAC_DEFAULT Yes 0000 0001 1111 0100
ECh MFR_SPECIFIC_28 Word AVS_CLAMP_HI Yes 0000 0010 1110 1110
EDh MFR_SPECIFIC_29 Word AVS_CLAMP_LO Yes 0000 0000 1111 1010
EFh MFR_SPECIFIC_30 Word Temperature Offset Yes 1111 1000 0000 0000
F0h MFR_SPECIFIC_32 Word API options Yes 0000 0000 0000 0000
FCh MFR_SPECIFIC_44 Word Device Code, Unique Code to ID part number No 0000 0000 1100 0011
(1) No data bytes are sent, only the command code is sent.