SLVSCJ1B September   2014  – January 2017 TPS68470

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements - Data Transmission
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Power-Up Sequence and Modes
      2. 8.3.2  Clock Generation
        1. 8.3.2.1 Crystal Oscillator
        2. 8.3.2.2 Phase Locked Loop (PLL)
        3. 8.3.2.3 Spread Spectrum Modulator
        4. 8.3.2.4 Clock Drivers
      3. 8.3.3  GPIO and Interrupt Generation
        1. 8.3.3.1 I2C Daisy Chain
        2. 8.3.3.2 Programmable Interrupt Trigger
        3. 8.3.3.3 Internal Interrupt Signals
      4. 8.3.4  Sensor GPO Signals
      5. 8.3.5  Power-Up and Software Reset
      6. 8.3.6  Core Buck
        1. 8.3.6.1 Buck Converter Switching Frequency
        2. 8.3.6.2 Buck Converter Internal Current Limit and Short Detection
      7. 8.3.7  Low Dropout Voltage Regulators (LDOs)
        1. 8.3.7.1 LDO Output Capacitor Requirements
        2. 8.3.7.2 LDO Internal Current Limit and Short Detection
        3. 8.3.7.3 Dropout Voltage
      8. 8.3.8  WLED Boost Converter and WLED Drivers
        1. 8.3.8.1 WLED Driver Operation
        2. 8.3.8.2 WLED Modes
          1. 8.3.8.2.1 FLASH: MODE[1:0] = '00''
          2. 8.3.8.2.2 TORCH: MODE[1:0] = '01''
          3. 8.3.8.2.3 RED-EYE REDUCTION: MODE[1:0] = '10''
          4. 8.3.8.2.4 FOCUS ASSIST: MODE[1:0] = '11''
        3. 8.3.8.3 WLED Trigger Options
          1. 8.3.8.3.1 Level-Sensitive Flash Trigger (TRIG = 0)
            1. 8.3.8.3.1.1 Edge Trigger Flash (TRIG = 1)
        4. 8.3.8.4 Blanking (Tx-Mask) for Instantaneous Flash-Current Reduction
        5. 8.3.8.5 Voltage Mode
      9. 8.3.9  Indicator LED Operation
        1. 8.3.9.1 Retriggerable Pulse Extender
      10. 8.3.10 Safe Operation and Protection Features
        1. 8.3.10.1 LED Temperature Monitoring (Finger-Burn Protection)
        2. 8.3.10.2 LED Failure Modes (Open/Short Detection) and Overvoltage Protection
        3. 8.3.10.3 WLED Open Circuit Detection/Over Voltage Protection
        4. 8.3.10.4 LED Current Ramp-Up/Down
        5. 8.3.10.5 Short Circuit Protection
        6. 8.3.10.6 Hot Die Detection and Thermal Shutdown
      11. 8.3.11 WLED Boost Inductor Selection
      12. 8.3.12 I2C Bus Operation
        1. 8.3.12.1 Single Write to a Defined Location
        2. 8.3.12.2 Single Read From a Defined Location and Current Location
        3. 8.3.12.3 Sequential Read and Write
      13. 8.3.13 Subaddress Definition
        1. 8.3.13.1 I2C Device Address, Start and Stop Condition
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation with a Single Input Power Rail
      2. 8.4.2 Sequencing the Input Power Rails
    5. 8.5 Register Map
      1. 8.5.1  GSTAT Register (address = 0x01) [reset = 00000000]
      2. 8.5.2  VRSTAT Register (address = 0x02) [reset = -]
      3. 8.5.3  VRSHORT Register (address = 0x03) [reset = 00000000]
      4. 8.5.4  INTMASK Register (address = 0x04) [reset = 00000000]
      5. 8.5.5  VCOSPEED Register (address = 0x05) [reset = 00000000]
      6. 8.5.6  POSTDIV2 Register (address = 0x06) [reset = 00000000]
      7. 8.5.7  BOOSTDIV Register (address = 0x07) [reset = 00000000]
      8. 8.5.8  BUCKDIV Register (address = 0x08) [reset = 00000000]
      9. 8.5.9  PLLSWR Register (address = 0x09) [reset = 00000000]
      10. 8.5.10 XTALDIV Register (address = 0x0A) [reset = 00000000]
      11. 8.5.11 PLLDIV Register (address = 0x0B) [reset = 00000000]
      12. 8.5.12 POSTDIV Register (address = 0x0C) [reset = 00000000]
      13. 8.5.13 PLLCTL Register (address = 0x0D) [reset = 10000000]
      14. 8.5.14 PLLCTL2 Register (address = 0x0E) [reset = 00000000]
      15. 8.5.15 CLKCFG1 Register (address = 0x0F) [reset = 00000000]
      16. 8.5.16 CLKCFG2 Register (address = 0x10) [reset = 00000000]
      17. 8.5.17 GPCTL0A Register (address = 0x14) [reset = 00000001]
      18. 8.5.18 GPCTL0B Register (address = 0x15) [reset = 00001000]
      19. 8.5.19 GPCTL1A Register (address = 0x16) [reset = 00000001]
      20. 8.5.20 GPCTL1B Register (address = 0x17) [reset = 00001000]
      21. 8.5.21 GPCTL2A Register (address = 0x18) [reset = 00000001]
      22. 8.5.22 GPCTL2B Register (address = 0x19) [reset = 00001000]
      23. 8.5.23 GPCTL3A Register (address = 0x1A) [reset = 00000001]
      24. 8.5.24 GPCTL3B Register (address = 0x1B) [reset = 00001000]
      25. 8.5.25 GPCTL4A Register (address = 0x1C) [reset = 00000001]
      26. 8.5.26 GPCTL4B Register (address = 0x1D) [reset = 00001000]
      27. 8.5.27 GPCTL5A Register (address = 0x1E) [reset = 00000001]
      28. 8.5.28 GPCTL5B Register (address = 0x1F) [reset = 00001000]
      29. 8.5.29 GPCTL6A Register (address = 0x20) [reset = 00000001]
      30. 8.5.30 GPCTL6B Register (address = 0x21) [reset = 00001000]
      31. 8.5.31 SGPO Register (address = 0x22) [reset = 00000000]
      32. 8.5.32 PITCTL Register (address = 0x23) [reset = 00000000]
      33. 8.5.33 WAKECFG Register (address = 0x24) [reset = 00000000]
      34. 8.5.34 IOWAKESTAT Register (address = 0x25) [reset = 00000000]
      35. 8.5.35 GPDI Register (address = 0x26) [reset = 00000000]
      36. 8.5.36 GPDO Register (address = 0x27) [reset = 00000000]
      37. 8.5.37 ILEDCTL Register (address = 0x28) [reset = 00000000]
      38. 8.5.38 WLEDSTAT Register (address = 0x29) [reset = 00000000]
      39. 8.5.39 VWLEDILIM Register (address = 0x2A) [reset = 00001010]
      40. 8.5.40 VWLEDVAL Register (address = 0x2B) [reset = 00000000]
      41. 8.5.41 WLEDMAXRER Register (address = 0x2C) [reset = 00000000]
      42. 8.5.42 WLEDMAXT Register (address = 0x2D) [reset = 00000000]
      43. 8.5.43 WLEDMAXAF Register (address = 0x2E) [reset = 00000000]
      44. 8.5.44 WLEDMAXF Register (address = 0x2F) [reset = 00000000]
      45. 8.5.45 WLEDTO Register (address = 0x30) [reset = 00000000]
      46. 8.5.46 VWLEDCTL Register (address = 0x31) [reset = 00111000]
      47. 8.5.47 WLEDTIMER_MSB Register (address = 0x32) [reset = 00000000]
      48. 8.5.48 WLEDTIMER_LSB Register (address = 0x33) [reset = 00000000]
      49. 8.5.49 WLEDC1 Register (address = 0x34) [reset = 00000000]
      50. 8.5.50 WLEDC2 Register (address = 0x35) [reset = 00000000]
      51. 8.5.51 WLEDCTL Register (address = 0x36) [reset = 00000000]
      52. 8.5.52 VCMVAL Register (address = 0x3C) [reset = 00000000]
      53. 8.5.53 VAUX1VAL Register (address = 0x3D) [reset = 00000000]
      54. 8.5.54 VAUX2VAL Register (address = 0x3E) [reset = 00000000]
      55. 8.5.55 VIOVAL Register (address = 0x3F) [reset = 00110100]
      56. 8.5.56 VSIOVAL Register (address = 0x40) [reset = 00110100]
      57. 8.5.57 VAVAL Register (address = 0x41) [reset = 00000000]
      58. 8.5.58 VDVAL Register (address = 0x42) [reset = 00000000]
      59. 8.5.59 S_I2C_CTL Register (address = 0x43) [reset = 00000000]
      60. 8.5.60 VCMCTL Register (address = 0x44) [reset = 00000000]
      61. 8.5.61 VAUX1CTL Register (address = 0x45) [reset = 00000000]
      62. 8.5.62 VAUX2CTL Register (address = 0x46) [reset = 00000000]
      63. 8.5.63 VACTL Register (address = 0x47) [reset = 00000000]
      64. 8.5.64 VDCTL Register (address = 0x48) [reset = 00000100]
      65. 8.5.65 RESET Register (address = 0x50) [reset = N/A]
      66. 8.5.66 REVID Register (address = 0xFF) [reset = 00100000]
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Core Buck Design
          1. 9.2.2.1.1 Inductor Selection
          2. 9.2.2.1.2 Output Capacitor
          3. 9.2.2.1.3 Input Capacitor
        2. 9.2.2.2 WLED Boost Design
          1. 9.2.2.2.1 Inductor Selection
          2. 9.2.2.2.2 Output Capacitor
          3. 9.2.2.2.3 Input Capacitor
        3. 9.2.2.3 LDOs Capacitor Selection
        4. 9.2.2.4 LED Selection
        5. 9.2.2.5 Recommended External Components
      3. 9.2.3 Application Performance Graphs
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • High-Efficiency Buck Converter
    • Output Current up to 500 mA
    • Output Voltage Selectable: 0.9 V to 1.95 V
  • Dual Flash LED Driver
    • High-Efficiency Boost Converter
      • Adaptive Output Voltage Regulation Based on LED Vf
    • Low Side LED Current Drivers
      • Two 1-A Current Drivers
      • LED Temperature Monitoring
      • Open/Short LED Detection/Protection
      • Controlled LED Current Ramp-Up/Down
  • Linear Regulator for Sensor Analog Supply
    • Output Voltage Programmable from 0.875 V to 3.1 V with 17.8-mV Steps
    • Output Current up to 200 mA
  • Linear Regulator for IO Supply
    • Output Voltage Programmable from 0.875 V to 3.1 V with 17.8-mV Steps
    • Output Current up to 50 mA
  • Linear Regulator for VCM (Voice Coil Motor) Driver Power
    • Output Voltage Programmable from 0.875 V to 3.1 V with 17.8-mV Steps
    • Output Current up to 500 mA
  • Linear Regulator for Auxiliary Power
    • Output Voltage Programmable from 0.875 V to 3.1 V with 17.8-mV Steps
    • Output Current up to 150 mA
  • Linear Regulator for Auxiliary Power
    • Output Voltage Programmable from 0.875 V to 3.1 V with 17.8-mV Steps
    • Output Current up to 50 mA
  • Linear Regulator for Sensor IO Supply
    • Output Voltage Programmable from 0.875 V to 3.1 V with 17.8-mV Steps
    • Output Current up to 150 mA
  • Clock Generation
    • Programmable PLL
    • Crystal Oscillator
  • I2C Interface
  • 7 GPIOs
  • System Reset
  • Operating Temperature Range: 0°C to 85°C
  • DSBGA with Package Height of 0.625 mm

2 Applications

  • Detachable Ultrabooks
  • Tablets
  • Smartphones
  • Compact Camera Modules (CCM)

3 Description

The TPS68470 device is an advanced power management unit that powers a Compact Camera Module (CCM), generates the clock for the image sensor, drives a dual LED for Flash and incorporates two LED drivers for general purpose indicators . The TPS68470 is capable of generating all needed power rails in a CCM.

The CORE voltage regulator is a state of the art buck converter which can be used for the image sensor digital supply. An LDO (LDO_ANA) can be used for the image sensor analog supply.

The TPS68470 also has a high efficiency boost converter to support two 1A LED flash drivers. The LED currents are controlled with regulated low side current sources.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS68470 DSBGA (56) 3.325 mm x 2.930 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Application Diagram

TPS68470 Sys_Blk.gif

4 Revision History

Changes from A Revision (March 2015) to B Revision

  • Changed LDO_AUX2 Max output current from 50 mA to 80 mA Go

Changes from * Revision (September 2014) to A Revision

  • Added Storage temperature to Absolute Maximum RatingsGo
  • Changed Handling Ratings to ESD Ratings Go
  • Deleted Storage temperature from ESD Ratings Go