SLUSCC7C July   2016  – June 2018 TPS546C23

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      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 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  2-Phase Application
      2. 7.3.2  Linear Regulators BP3 and BP6
      3. 7.3.3  Input Undervoltage Lockout (UVLO)
      4. 7.3.4  Turnon and Turnoff Delay and Sequencing
      5. 7.3.5  Voltage Reference
      6. 7.3.6  Differential Remote Sense and Compensation
      7. 7.3.7  Set Output Voltage and Adaptive Voltage Scaling (AVS)
        1. 7.3.7.1 VOUT_COMMAND
        2. 7.3.7.2 VREF_TRIM
        3. 7.3.7.3 MARGIN
      8. 7.3.8  Reset VOUT
      9. 7.3.9  Switching Frequency and Synchronization
        1. 7.3.9.1 Synchronization
          1. 7.3.9.1.1 Stand-Alone Device
          2. 7.3.9.1.2 Master-Slave Configuration
          3. 7.3.9.1.3 SYNC Fault
      10. 7.3.10 Current Sharing
      11. 7.3.11 Soft-Start Time and TON_RISE Command
      12. 7.3.12 Prebiased Output Start-Up
      13. 7.3.13 Soft-Stop time and TOFF_FALL Command
      14. 7.3.14 Output Current Telemetry and Low-Side MOSFET Overcurrent Protection
        1. 7.3.14.1 Output Current Telemetry
        2. 7.3.14.2 Low-Side MOSFET Overcurrent Protection
        3. 7.3.14.3 Negative Overcurrent Protection
      15. 7.3.15 High-Side MOSFET Short-Circuit Protection
      16. 7.3.16 Die Temperature Telemetry and Overtemperature Protection
      17. 7.3.17 Output Voltage Telemetry and Over-/Under-voltage Protection
        1. 7.3.17.1 Output Voltage Telemetry
        2. 7.3.17.2 Output Overvoltage and Undervoltage Protection
      18. 7.3.18 TON_MAX Fault
      19. 7.3.19 Power Good (PGOOD) Indicator
      20. 7.3.20 Fault Protection Responses
      21. 7.3.21 Switching Node
      22. 7.3.22 PMBus General Description
      23. 7.3.23 PMBus Address
      24. 7.3.24 PMBus Connections
      25. 7.3.25 Auto ARA (Alert Response Address) Response
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuous Conduction Mode
      2. 7.4.2 Operation with CNTL Signal Control
      3. 7.4.3 Operation with OPERATION Control
      4. 7.4.4 Operation with CNTL and OPERATION Control
    5. 7.5 Programming
      1. 7.5.1 Supported PMBus Commands
    6. 7.6 Register Maps
      1. 7.6.1  OPERATION (01h)
        1. 7.6.1.1 On Bit
        2. 7.6.1.2 Off Bit
        3. 7.6.1.3 Margin Bit
      2. 7.6.2  ON_OFF_CONFIG (02h)
        1. 7.6.2.1 pu Bit
        2. 7.6.2.2 cmd Bit
        3. 7.6.2.3 cpr Bit
        4. 7.6.2.4 pol Bit
        5. 7.6.2.5 cpa Bit
      3. 7.6.3  CLEAR_FAULTS (03h)
      4. 7.6.4  WRITE_PROTECT (10h)
        1. 7.6.4.1 bit5
        2. 7.6.4.2 bit6
        3. 7.6.4.3 bit7
      5. 7.6.5  STORE_DEFAULT_ALL (11h)
      6. 7.6.6  RESTORE_DEFAULT_ALL (12h)
      7. 7.6.7  STORE_USER_ALL (11h)
      8. 7.6.8  RESTORE_USER_ALL (12h)
      9. 7.6.9  CAPABILITY (19h)
      10. 7.6.10 SMBALERT_MASK (1Bh)
      11. 7.6.11 VOUT_MODE (20h)
        1. 7.6.11.1 Mode Bit
        2. 7.6.11.2 Exponent Bit
      12. 7.6.12 VOUT_COMMAND (21h)
        1. 7.6.12.1 Exponent
        2. 7.6.12.2 Mantissa
      13. 7.6.13 VOUT_MAX (24h)
        1. 7.6.13.1 Exponent
        2. 7.6.13.2 Mantissa
      14. 7.6.14 VOUT_TRANSITION_RATE (27h)
        1. 7.6.14.1 Exponent
        2. 7.6.14.2 Mantissa
      15. 7.6.15 VOUT_SCALE_LOOP (29h)
        1. 7.6.15.1 Exponent
        2. 7.6.15.2 Mantissa
      16. 7.6.16 VOUT_MIN (2Bh)
        1. 7.6.16.1 Exponent
        2. 7.6.16.2 Mantissa
      17. 7.6.17 VIN_ON (35h)
        1. 7.6.17.1 Exponent
        2. 7.6.17.2 Mantissa
      18. 7.6.18 VIN_OFF (36h)
        1. 7.6.18.1 Exponent
        2. 7.6.18.2 Mantissa
      19. 7.6.19 IOUT_CAL_OFFSET (39h)
        1. 7.6.19.1 Exponent
        2. 7.6.19.2 Mantissa
      20. 7.6.20 VOUT_OV_FAULT_RESPONSE (41h)
        1. 7.6.20.1 RSP[1] Bit
        2. 7.6.20.2 RS[2:0] Bits
        3. 7.6.20.3 TD[2:0] Bits
      21. 7.6.21 VOUT_UV_FAULT_RESPONSE (45h)
        1. 7.6.21.1 RSP[1] Bit
        2. 7.6.21.2 RS[2:0] Bits
        3. 7.6.21.3 TD[2:0] Bits
      22. 7.6.22 IOUT_OC_FAULT_LIMIT (46h)
        1. 7.6.22.1 Exponent
        2. 7.6.22.2 Mantissa
      23. 7.6.23 IOUT_OC_FAULT_RESPONSE (47h)
        1. 7.6.23.1 RSP[1:0] Bits
        2. 7.6.23.2 RS[2:0] Bits
        3. 7.6.23.3 TD[2:0] Bits
      24. 7.6.24 IOUT_OC_WARN_LIMIT (4Ah)
        1. 7.6.24.1 Exponent
        2. 7.6.24.2 Mantissa
      25. 7.6.25 OT_FAULT_LIMIT (4Fh)
        1. 7.6.25.1 Exponent
        2. 7.6.25.2 Mantissa
      26. 7.6.26 OT_FAULT_RESPONSE (50h)
        1. 7.6.26.1 RSP[1] Bit
        2. 7.6.26.2 RS[2:0] Bits
        3. 7.6.26.3 TD[2:0] Bits
      27. 7.6.27 OT_WARN_LIMIT (51h)
        1. 7.6.27.1 Exponent
        2. 7.6.27.2 Mantissa
      28. 7.6.28 TON_DELAY (60h)
        1. 7.6.28.1 Exponent
        2. 7.6.28.2 Mantissa
      29. 7.6.29 TON_RISE (61h)
        1. 7.6.29.1 Exponent
        2. 7.6.29.2 Mantissa
      30. 7.6.30 TON_MAX_FAULT_LIMIT (62h)
        1. 7.6.30.1 Exponent
        2. 7.6.30.2 Mantissa
      31. 7.6.31 TON_MAX_FAULT_RESPONSE (63h)
        1. 7.6.31.1 RSP[1] Bit
        2. 7.6.31.2 RS[2:0] Bits
        3. 7.6.31.3 TD[2:0] Bits
      32. 7.6.32 TOFF_DELAY (64h)
        1. 7.6.32.1 Exponent
        2. 7.6.32.2 Mantissa
      33. 7.6.33 TOFF_FALL (65h)
        1. 7.6.33.1 Exponent
        2. 7.6.33.2 Mantissa
      34. 7.6.34 STATUS_BYTE (78h)
      35. 7.6.35 STATUS_WORD (79h)
      36. 7.6.36 STATUS_VOUT (7Ah)
      37. 7.6.37 STATUS_IOUT (7Bh)
      38. 7.6.38 STATUS_INPUT (7Ch)
      39. 7.6.39 STATUS_TEMPERATURE (7Dh)
      40. 7.6.40 STATUS_CML (7Eh)
      41. 7.6.41 STATUS_MFR_SPECIFIC (80h)
      42. 7.6.42 READ_VOUT (8Bh)
        1. 7.6.42.1 Exponent
        2. 7.6.42.2 Mantissa
      43. 7.6.43 READ_IOUT (8Ch)
        1. 7.6.43.1 Exponent
        2. 7.6.43.2 Mantissa
      44. 7.6.44 READ_TEMPERATURE_1 (8Dh)
        1. 7.6.44.1 Exponent
        2. 7.6.44.2 Mantissa
      45. 7.6.45 PMBUS_REVISION (98h)
      46. 7.6.46 IC_DEVICE_ID (ADh)
      47. 7.6.47 IC_DEVICE_REV (AEh)
      48. 7.6.48 MFR_SPECIFIC_00 (D0h)
      49. 7.6.49 VREF_TRIM (MFR_SPECIFIC_04) (D4h)
      50. 7.6.50 STEP_VREF_MARGIN_HIGH (MFR_SPECIFIC_05) (D5h)
      51. 7.6.51 STEP_VREF_MARGIN_LOW (MFR_SPECIFIC_06) (D6h)
      52. 7.6.52 PCT_OV_UV_WRN_FLT_LIMITS (MFR_SPECIFIC_07) (D7h)
      53. 7.6.53 OPTIONS (MFR_SPECIFIC_21) (E5h)
        1. 7.6.53.1  DIS_NEGILIM Bit
        2. 7.6.53.2  EN_RESET_B Bit
        3. 7.6.53.3  EN_ADC_CNTL Bit
        4. 7.6.53.4  VSM Bit
        5. 7.6.53.5  DLO Bit
        6. 7.6.53.6  AVG_PROG[1:0] Bits
        7. 7.6.53.7  EN_AUTO_ARA Bit
        8. 7.6.53.8  READ_VOUT_RANGE[1:0] Bits
        9. 7.6.53.9  RST_VOUT_oSD Bit
        10. 7.6.53.10 RSMLO_VAL Bit
        11. 7.6.53.11 RSMHI_VAL Bit
      54. 7.6.54 MISC_CONFIG_OPTIONS (MFR_SPECIFIC_32) (F0h)
        1. 7.6.54.1 OV_RESP_SEL Bit
        2. 7.6.54.2 HSOC_USER_TRIM[1:0] Bits
        3. 7.6.54.3 EN_AVS_USER Bit
        4. 7.6.54.4 FORCE_SYNC_OUT Bit
        5. 7.6.54.5 FORCE_SYNC_IN Bit
        6. 7.6.54.6 SYNC_FAULT_DIS Bit
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 4.5-V to 18-V Input, 1-V Typical Output, 35-A Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Custom Design With WEBENCH® Tools
          2. 8.2.1.2.2  Switching Frequency Selection
          3. 8.2.1.2.3  Inductor Selection
          4. 8.2.1.2.4  Output Capacitor Selection
          5. 8.2.1.2.5  Output Voltage Deviation During Load Transient
          6. 8.2.1.2.6  Output Voltage Ripple
          7. 8.2.1.2.7  Input Capacitor Selection
          8. 8.2.1.2.8  AVIN, BP6, BP3 Bypass Capacitor
          9. 8.2.1.2.9  Bootstrap Capacitor Selection
          10. 8.2.1.2.10 R-C Snubber
          11. 8.2.1.2.11 Output Voltage Setting and Frequency Compensation Selection
          12. 8.2.1.2.12 Key PMBus Parameter Selection
          13. 8.2.1.2.13 Enable, UVLO
          14. 8.2.1.2.14 Soft-Start Time
          15. 8.2.1.2.15 Overcurrent Threshold and Response
        3. 8.2.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Mounting and Thermal Profile Recommendation
  11. 11Device and Documentation Support
    1. 11.1 Development Support
      1. 11.1.1 Custom Design With WEBENCH® Tools
      2. 11.1.2 Texas Instruments Fusion Digital Power Designer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.5.1 Supported PMBus Commands

The commands listed in Table 4 are implemented as described to conform to the PMBus 1.3 specification. Table 4 also lists the default for the bit behavior and register values.

Table 4. Supported PMBus Commands and Default Values

CMD
CODE		 PMBus 1.3
COMMAND NAME		 PMBus COMMAND DESCRIPTION DEFAULT BEHAVIOR DEFAULT
REGISTER
VALUE		 NVM
01h OPERATION Can be configured through ON_OFF_CONFIG to be used to turn the output on and off with or without input from the CTRL pin. OPERATION is not used to enable regulation 00h No
02h ON_OFF_CONFIG Configures the combination of CNTL pin input and OPERATION command for turning output on and off. CNTL only. Active High 16h Yes
03h CLEAR_FAULTS Clears all fault status registers to 0x00 and releases SMBALERT. Write-only n/a No
10h WRITE_PROTECT Used to control writing to the volatile operating memory (PMBus and restore from EEPROM). Allow writes to all registers 00h Yes
11h STORE_DEFAULT_ALL Stores all current storable register settings into EEPROM as new defaults. Write-only n/a No
12h RESTORE_DEFAULT_ALL Restores all storable register settings from EEPROM. Write-only n/a No
15h RESTORE_USER_ALL Stores all current storable register settings into EEPROM as new defaults. Write-only n/a No
16h RESTORE_USER_ALL Restores all storable register settings from EEPROM. Write-only n/a No
19h CAPABILITY Provides a way for a host system to determine key PMBus capabilities of the device. Read only. PMBus v1.3, 400 kHz, PEC and SMBus Alert Response Protocol supported. B0h No
1Bh SMBALERT_MASK Mask Warn or Fault status bits Mask PGOODz only n/a Yes
20h VOUT_MODE Read-only output mode indicator. Linear, exponent = –9 17h No
21h VOUT_COMMAND Default Regulation Setpoint 600mV 0133h Yes
24h VOUT_MAX Sets the maximum output voltage. VOUT_MAX imposes a higher bound to any attempted VOUT setting. If VOUT_SCALE_LOOP = 1: VOUT_MAX will restore to 1.65 V. 034Dh No
If VOUT_SCALE_LOOP = 0.5: VOUT_MAX will restore to 3.3 V. 069Ah
If VOUT_SCALE_LOOP = 0.25: VOUT_MAX will restore to 6 V. 0C00h
27h VOUT_TRANSITION_RATE Sets the rate at which the output should change voltage. 1 mV/us D03Ch No
29h VOUT_SCALE_LOOP Sets output sense scaling ratio for main control loop. 1 F004h Yes
2Bh VOUT_MIN Sets the minimum output voltage. VOUT_MIN imposes a lower bound to any attempted VOUT setting. If VOUT_SCALE_LOOP = 1: VOUT_MIN will restore to 0.35 V. 00B3h No
If VOUT_SCALE_LOOP = 0.5: VOUT_MIN will restore to 0.7 V. 0166h
If VOUT_SCALE_LOOP = 0.25: VOUT_MIN will restore to 1.4 V. 02CCh
35h VIN_ON Sets value of input voltage at which the device should start power conversion. 4.5 V F012h Yes
36h VIN_OFF Sets value of input voltage at which the device should stop power conversion. 4 V F010h Yes
39h IOUT_CAL_OFFSET Can be set to null out offsets in the current sensing circuit. 0.0000 A E000h Yes
41h VOUT_OV_FAULT_RESPONSE Sets output overvoltage fault response. Restart BFh Yes
45h VOUT_UV_FAULT_RESPONSE Sets output undervoltage fault response. Restart BFh Yes
46h IOUT_OC_FAULT_LIMIT Sets the value of the output current that causes an overcurrent fault condition. 42 A F854h Yes
47h IOUT_OC_FAULT_RESPONSE Sets response to output overcurrent faults to latch-off, hiccup mode or ignore. Restart FFh Yes
4Ah IOUT_OC_WARN_LIMIT Sets the value of the output current that causes an overcurrent warning condition. 37 A F84Ah No
4Fh OT_FAULT_LIMIT Sets the value of the sensed temperature that causes an overtemperature fault condition. 145°C 0091h Yes
50h OT_FAULT_RESPONSE Sets response to over temperature faults to latch-off, hiccup mode or ignore. Ignore 3Fh Yes
51h OT_WARN_LIMIT Sets the value of the sensed temperature that causes an overtemperature warning condition. 120°C 0078h No
60h TON_DELAY Sets the turnon delay. 0 ms 0000h Yes
61h TON_RISE Sets the time from when the output starts to rise until the voltage has entered the regulation band. 3 ms 0003h Yes
62h TON_MAX_FAULT_LIMIT Sets an UPPER limt in milliseconds, on how long the unit can attempt to power up the output without reaching the output undervoltage fault limit. The time begins counting as the device enters the soft-start period. Disabled 0000h No
63h TON_MAX_FAULT_RESPONSE Sets the soft start timeout fault response. Restart BFh Yes
64h TOFF_DELAY Sets the turnoff delay. 0 ms 0000h Yes
65h TOFF_FALL Sets the soft stop fall time. 0 ms 0000h Yes
78h STATUS_BYTE Returns one byte summarizing the most critical faults. Current status No
79h STATUS_WORD Returns two bytes summarizing fault and warning conditions. Current status No
7Ah STATUS_VOUT Returns one byte detailing if an output fault or warning has occurred Current status No
7Bh STATUS_IOUT Returns one byte detailing if an overcurrent fault or warning has occurred Current status No
7Ch STATUS_INPUT Returns one byte of information relating to the status of the converter's input related faults. Current status No
7Dh STATUS_TEMPERATURE Returns one byte detailing if a sensed temperature fault or warning has occurred. Current status No
7Eh STATUS_CML Returns one byte containing PMBus serial communication faults. Current status No
80h STATUS_MFR_SPECIFIC Returns one byte detailing if internal overtemperature or address detection fault has occurred. Current status No
8Bh READ_VOUT Returns the output voltage in volts. Read only Current status No
8Ch READ_IOUT Returns the output current in amps. Read only Current status No
8Dh READ_TEMPERATURE_1 Returns the sensed die temperature in degrees Celsius. Read-only Current status No
98h PMBUS_REVISION Returns PMBus revision to which the device is compliant. PMBus 1.3 33h No
ADh IC_DEVICE_ID This Read-only Block Read command returns a single word (16 bits) with the unique Device Code identifier for each device for which this device can be configured. The BYTE_COUNT field in the Block Read command is 2 (indicating 2 bytes follow): Low Byte first, then High Byte. TPS546C23 4623h No
AEh IC_DEVICE_REV This Read-only Block Read command returns a single word (16 bits) with the unique Device revision identifier. The BYTE_COUNT field in the Block Read command is 2 (indicating 2 bytes follow): Low Byte first, then High Byte. Read only 0001h No
D0h MFR_SPECIFIC_00 User scratch pad. 0000h Yes
D4h VREF_TRIM (MFR_SPECIFIC_04) (D4h) Applies a fixed offset voltage to the Error Amplifier Reference voltage (EA_REF). Fixed offset of 0 mV 0000h Yes
D5h STEP_VREF_MARGIN_HIGH (MFR_SPECIFIC_05) (D5h) Increases the value of the reference voltage by shifting the reference higher. If RSMHI_VAL = 0: STEP_VREF_MARGIN_HIGH will restore to 17.6 mV If RSMHI_VAL = 0: 0009h No
If RSMHI_VAL = 1: STEP_VREF_MARGIN_HIGH will restore to 29.3 mV If RSMHI_VAL = 1: 000fh
D6h STEP_VREF_MARGIN_LOW (MFR_SPECIFIC_06) (D6h) Decreases the value of the reference voltage by shifting the reference lower. If RSMLO_VAL = 0: STEP_VREF_MARGIN_LOW will restore to –17.6 mV If RSMLO_VAL = 0: fff7h No
If RSMLO_VAL = 1: STEP_VREF_MARGIN_LOW will restore to –29.3 mV If RSMLO_VAL = 1: fff1h
D7h PCT_OV_UV_WRN_FLT_LIMITS (MFR_SPECIFIC_07) (D7h) Sets the PGOOD, VOUT_UNDER_VOLTAGE (UV) and VOUT_OVER_VOLTAGE (OV) Limits as a percentage of nominal. –17% for UV Fault, –12% for UV Warning, +12% for OV Warning, +17% for OV Fault. 00h Yes
E5h OPTIONS (MFR_SPECIFIC_21) Sets user selectable options. See detailed command description 1184h Yes
F0h MISC_CONFIG_OPTIONS (MFR_SPECIFIC_32) Sets miscellaneous user selectable options. See detailed command description 0013h Yes