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

5 Pin Configuration and Functions

RHA PACKAGE
40 PINS
(Top View)
TPS40425 pinout_rha40_slusbo6.gif

Pin Functions

PIN I/O(1) DESCRIPTION
NAME NO.
ADDR1 11 I High order address pin for PMBus device. Connect a resistor to AGND (see Table 3).
ADDR0 12 I Low order address pin for PMBus device. Connect a resistor to AGND (see Table 3).
AGND 8 — Analog ground pin, used for analog signal. Connect to thermal pad directly.
AVSCLK 10 I AVS clock
AVSDATA 9 I AVS data
BP3 26 O 3.3-V bias power for logic. A low ESR ceramic capacitor with a value of 0.33 µF or greater should be connected closely from this pin or to AGND. The maximum suggested capacitor value is 10 µF.
BP5 25 O Output bypass for the internal regulator. A low ESR ceramic capacitor of 1 µF or greater should be connected closely from this pin to PGND pin. The maximum suggested capacitor value is 10 µF.
CNTL1 3 I Logic level input which starts or stops channel 1. An internal 6-µA current source pulls VCNTL1 up to VBP5 when the pin is floating.
CNTL2 4 I Logic level input which starts or stops channel 2. An internal 6-µA current source pulls VCNTL2 up to VBP5 when the pin is floating.
COMP1 36 O Output of the error amplifier 1 and connection node for loop feedback components
COMP2 15 O Output of the error amplifier 2 and connection node for loop feedback components
CS1N 33 I Negative pin of current sense amplifier for channel 1. An internal, 4-kΩ resistor pulls CS1N to 1.24 V during smart power mode operation to provide a bias voltage required by the smart power stage device.
CS1P 32 I Positive pin of current sense amplifier for channel 1
CS2N 18 I Negative pin of current sense amplifier for channel 2. An internal, 4-kΩ resistor pulls CS2N to 1.24 V during smart power mode operation to provide a bias voltage required by the smart power stage device.
CS2P 19 I Positive pin of current sense amplifier for channel 2
DIFFO1 39 O Remote Sense Amplifier Output for channel 1
FB1 35 I Inverting input to the error amplifier 1. In normal operation, the voltage on this pin is equal to the internal reference voltage. Connect to BP5 to set the channel as slave channel.
FB2 16 I Inverting input to the error amplifier 2. In normal operation, the voltage on this pin is equal to the internal reference voltage. Connect to BP5 to set the channel as slave channel.
FLT1 34 I/O Fault signal of channel 1. An internal 100-kΩ resistor pulls FLT1 to BP3.
FLT2 17 I/O Fault signal of channel 2. An internal 100-kΩ resistor pulls FLT2 to BP3.
GSNS1 38 I Negative pin of Voltage Sense Signal for channel 1
GSNS2 13 I Negative pin of Voltage Sense Signal for channel 2
ISH1 30 I Current sharing signal of channel 1 for multi-phase mode
ISH2 21 I Current sharing signal of channel 2 for multi-phase mode
PG1 29 O Open drain power good indicator for channel 1 output voltage. This pin is pulled to ground internally in slave channel.
PG2 22 O Open drain power good indicator for channel 2 output voltage. This pin is pulled to ground internally in slave channel.
PGND 27 — Power GND, used for BP5 bypass capacitor. Connect to thermal pad directly.
PHSET 2 I/O Phase set for multiphase mode
PMBCLK 7 I PMBus clock pin
PMBDATA 6 I/O PMBus data pin
PWM1 28 O PWM signal for channel 1
PWM2 23 O PWM signal for channel 2
RT 40 I Connecting a resistor from this pin to AGND sets the oscillator frequency
SMBALERT 5 O PMBus alert pin.
SYNC 1 I/O This is the synchronization pin for use with the external clock. The frequency of external SYNC signal must be 4 times of desired switching frequency during 1-, 2-, or 4- phases, and must be 3 times the desired switching frequency during 3-phase configuration.
TSNS1 31 I External temperature sense signal input for channel 1
TSNS2 20 I External temperature sense signal input for channel 2
VDD 24 I Power input to the controller. A low ESR ceramic capacitor with a value of 1-μF or greater should be connected closely from this pin to AGND.
VSNS1 37 I Positive pin of voltage sense signal for channel 1
VSNS2 14 I Positive pin of voltage sense signal for channel 2
(1) I = input, O = output, P = power, I/O = bi-directional