SLDS234B December   2017  – September 2018 TPS65218D0

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Simplified Schematic
  2. 2 Revision History
  3. 3 Pin Configuration and Functions
    1. 3.1 Pin Functions
      1.      Pin Functions
  4. 4 Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 ESD Ratings
    3. 4.3 Recommended Operating Conditions
    4. 4.4 Thermal Information
    5. 4.5 Electrical Characteristics
    6. 4.6 Timing Requirements
    7. 4.7 Typical Characteristics
  5. 5 Detailed Description
    1. 5.1 Overview
    2. 5.2 Functional Block Diagram
    3. 5.3 Feature Description
      1. 5.3.1 Wake-Up and Power-Up and Power-Down Sequencing
        1. 5.3.1.1  Power-Up Sequencing
        2. 5.3.1.2  Power-Down Sequencing
        3. 5.3.1.3  Strobes 1 and 2
        4. 5.3.1.4  Supply Voltage Supervisor and Power Good (PGOOD)
        5. 5.3.1.5  Backup Supply Power-Good (PGOOD_BU)
        6. 5.3.1.6  Internal LDO (INT_LDO)
        7. 5.3.1.7  Current Limited Load Switches
          1. 5.3.1.7.1 Load Switch 1 (LS1)
          2. 5.3.1.7.2 Load Switch 2 (LS2)
          3. 5.3.1.7.3 Load Switch 3 (LS3)
        8. 5.3.1.8  LDO1
        9. 5.3.1.9  Coin Cell Battery Voltage Acquisition
        10. 5.3.1.10 UVLO
        11. 5.3.1.11 Power-Fail Comparator
        12. 5.3.1.12 Battery-Backup Supply Power-Path
        13. 5.3.1.13 DCDC3 / DCDC4 Power-Up Default Selection
        14. 5.3.1.14 I/O Configuration
          1. 5.3.1.14.1 Configuring GPO2 as Open-Drain Output
          2. 5.3.1.14.2 Using GPIO3 as Reset Signal to DCDC1 and DCDC2
        15. 5.3.1.15 Push Button Input (PB)
          1. 5.3.1.15.1 Signaling PB-Low Event on the nWAKEUP Pin
          2. 5.3.1.15.2 Push Button Reset
        16. 5.3.1.16 AC_DET Input (AC_DET)
        17. 5.3.1.17 Interrupt Pin (INT)
        18. 5.3.1.18 I2C Bus Operation
    4. 5.4 Device Functional Modes
      1. 5.4.1 Modes of Operation
      2. 5.4.2 OFF
      3. 5.4.3 ACTIVE
      4. 5.4.4 SUSPEND
      5. 5.4.5 RESET
    5. 5.5 Programming
      1. 5.5.1 Programming Power-Up Default Values
    6. 5.6 Register Maps
      1. 5.6.1 Password Protection
      2. 5.6.2 Freshness Seal (FSEAL) Bit
      3. 5.6.3 FLAG Register
      4. 5.6.4 TPS65218D0 Registers
        1. 5.6.4.1  CHIPID Register (subaddress = 0x0) [reset = 0x5]
          1. Table 5-8 CHIPID Register Field Descriptions
        2. 5.6.4.2  INT1 Register (subaddress = 0x1) [reset = 0x0]
          1. Table 5-9 INT1 Register Field Descriptions
        3. 5.6.4.3  INT2 Register (subaddress = 0x2) [reset = 0x0]
          1. Table 5-10 INT2 Register Field Descriptions
        4. 5.6.4.4  INT_MASK1 Register (subaddress = 0x3) [reset = 0x0]
          1. Table 5-11 INT_MASK1 Register Field Descriptions
        5. 5.6.4.5  INT_MASK2 Register (subaddress = 0x4) [reset = 0x0]
          1. Table 5-12 INT_MASK2 Register Field Descriptions
        6. 5.6.4.6  STATUS Register (subaddress = 0x5) [reset = 00XXXXXXb]
          1. Table 5-13 STATUS Register Field Descriptions
        7. 5.6.4.7  CONTROL Register (subaddress = 0x6) [reset = 0x0]
          1. Table 5-14 CONTROL Register Field Descriptions
        8. 5.6.4.8  FLAG Register (subaddress = 0x7) [reset = 0x0]
          1. Table 5-15 FLAG Register Field Descriptions
        9. 5.6.4.9  PASSWORD Register (subaddress = 0x10) [reset = 0x0]
          1. Table 5-16 PASSWORD Register Field Descriptions
        10. 5.6.4.10 ENABLE1 Register (subaddress = 0x11) [reset = 0x0]
          1. Table 5-17 ENABLE1 Register Field Descriptions
        11. 5.6.4.11 ENABLE2 Register (subaddress = 0x12) [reset = 0x0]
          1. Table 5-18 ENABLE2 Register Field Descriptions
        12. 5.6.4.12 CONFIG1 Register (subaddress = 0x13) [reset = 0x4C]
          1. Table 5-19 CONFIG1 Register Field Descriptions
        13. 5.6.4.13 CONFIG2 Register (subaddress = 0x14) [reset = 0xC0]
          1. Table 5-20 CONFIG2 Register Field Descriptions
        14. 5.6.4.14 CONFIG3 Register (subaddress = 0x15) [reset = 0x0]
          1. Table 5-21 CONFIG3 Register Field Descriptions
        15. 5.6.4.15 DCDC1 Register (offset = 0x16) [reset = 0x99]
          1. Table 5-22 DCDC1 Register Field Descriptions
        16. 5.6.4.16 DCDC2 Register (subaddress = 0x17) [reset = 0x99]
          1. Table 5-23 DCDC2 Register Field Descriptions
        17. 5.6.4.17 DCDC3 Register (subaddress = 0x18) [reset = 0x8C]
          1. Table 5-24 DCDC3 Register Field Descriptions
        18. 5.6.4.18 DCDC4 Register (subaddress = 0x19) [reset = 0xB2]
          1. Table 5-25 DCDC4 Register Field Descriptions
        19. 5.6.4.19 SLEW Register (subaddress = 0x1A) [reset = 0x6]
          1. Table 5-26 SLEW Register Field Descriptions
        20. 5.6.4.20 LDO1 Register (subaddress = 0x1B) [reset = 0x1F]
          1. Table 5-27 LDO1 Register Field Descriptions
        21. 5.6.4.21 SEQ1 Register (subaddress = 0x20) [reset = 0x0]
          1. Table 5-28 SEQ1 Register Field Descriptions
        22. 5.6.4.22 SEQ2 Register (subaddress = 0x21) [reset = 0x0]
          1. Table 5-29 SEQ2 Register Field Descriptions
        23. 5.6.4.23 SEQ3 Register (subaddress = 0x22) [reset = 0x98]
          1. Table 5-30 SEQ3 Register Field Descriptions
        24. 5.6.4.24 SEQ4 Register (subaddress = 0x23) [reset = 0x75]
          1. Table 5-31 SEQ4 Register Field Descriptions
        25. 5.6.4.25 SEQ5 Register (subaddress = 0x24) [reset = 0x12]
          1. Table 5-32 SEQ5 Register Field Descriptions
        26. 5.6.4.26 SEQ6 Register (subaddress = 0x25) [reset = 0x63]
          1. Table 5-33 SEQ6 Register Field Descriptions
        27. 5.6.4.27 SEQ7 Register (subaddress = 0x26) [reset = 0x3]
          1. Table 5-34 SEQ7 Register Field Descriptions
  6. 6 Application and Implementation
    1. 6.1 Application Information
      1. 6.1.1 Applications Without Backup Battery
      2. 6.1.2 Applications Without Battery Backup Supplies
    2. 6.2 Typical Application
      1. 6.2.1 Design Requirements
      2. 6.2.2 Detailed Design Procedure
        1. 6.2.2.1 Output Filter Design
        2. 6.2.2.2 Inductor Selection for Buck Converters
        3. 6.2.2.3 Output Capacitor Selection
      3. 6.2.3 Application Curves
  7. 7 Power Supply Recommendations
  8. 8 Layout
    1. 8.1 Layout Guidelines
    2. 8.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 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 Community Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

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

5.3.1.5 Backup Supply Power-Good (PGOOD_BU)

PGOOD_BU is a push-pull output indicating if DCDC5 and DCDC6 are in regulation. The output is driven to high when both rails are in regulation, and driven low if at least one of the rails is below the power-good threshold. The output-high level is equal to the output voltage of DCDC6.

PGOOD_BU is the logical AND between PGOOD(DCDC5) and PGOOD(DCDC6), and has no delay time built-in. Unlike main power-good, a fault on DCDC5 or DCDC6 does not trigger the power-down sequencer, does not disable any of the rails in the system, and has no effect on the PGOOD pin. DCDC5 and DCDC6 recover automatically once the fault is removed.

NOTE

In this example, the power-down is triggered by a fault on DCDC3.

This timing diagram assumes each rail powers up within the strobe delay time. If a rail takes longer than the strobe delay time to power up, the next rail will wait for the previous rail to reach its PGOOD voltage, and then may wait an additional 1ms until it is enabled.

TPS65218D0 typ_power_up_seq_dcdc5_lds206.gifFigure 5-9 Typical Power-Up Sequence of DCDC5 and DCDC6