JAJSTA1 August   2024 TPSM8287A15M

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 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 I2C Interface Timing Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Fixed-Frequency DCS-Control Topology
      2. 7.3.2  Forced-PWM and Power Save Modes
      3. 7.3.3  Precise Enable
      4. 7.3.4  Start-Up
      5. 7.3.5  Switching Frequency Selection
      6. 7.3.6  Output Voltage Setting
        1. 7.3.6.1 Output Voltage Setpoint
        2. 7.3.6.2 Output Voltage Range
        3. 7.3.6.3 Non-Default Output Voltage Setpoint
        4. 7.3.6.4 Dynamic Voltage Scaling (DVS)
      7. 7.3.7  Compensation (COMP)
      8. 7.3.8  Mode Selection / Clock Synchronization (MODE/SYNC)
      9. 7.3.9  Spread Spectrum Clocking (SSC)
      10. 7.3.10 Output Discharge
      11. 7.3.11 Undervoltage Lockout (UVLO)
      12. 7.3.12 Overvoltage Lockout (OVLO)
      13. 7.3.13 Overcurrent Protection
        1. 7.3.13.1 Cycle-by-Cycle Current Limiting
        2. 7.3.13.2 Hiccup Mode
        3. 7.3.13.3 Current-Limit Mode
      14. 7.3.14 Power Good (PG)
        1. 7.3.14.1 Power-Good Standalone, Primary Device Behavior
        2. 7.3.14.2 Power-Good Secondary Device Behavior
      15. 7.3.15 Remote Sense
      16. 7.3.16 Thermal Warning and Shutdown
      17. 7.3.17 Stacked Operation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-On Reset (POR)
      2. 7.4.2 Undervoltage Lockout
      3. 7.4.3 Standby
      4. 7.4.4 On
    5. 7.5 Programming
      1. 7.5.1 Serial Interface Description
      2. 7.5.2 Standard-, Fast-, Fast-Mode Plus Protocol
      3. 7.5.3 I2C Update Sequence
      4. 7.5.4 I2C Register Reset
  9. 8 Device Registers
  10. 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 Selecting the Input Capacitors
        2. 9.2.2.2 Selecting the Target Loop Bandwidth
        3. 9.2.2.3 Selecting the Compensation Resistor
        4. 9.2.2.4 Selecting the Output Capacitors
        5. 9.2.2.5 Selecting the Compensation Capacitor, CComp1
        6. 9.2.2.6 Selecting the Compensation Capacitor, CComp2
      3. 9.2.3 Application Curves
    3. 9.3 Typical Application Using Four TPSM8287A1xM in Parallel Operation
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
        1. 9.3.2.1 Selecting the Input Capacitors
        2. 9.3.2.2 Selecting the Target Loop Bandwidth
        3. 9.3.2.3 Selecting the Compensation Resistor
        4. 9.3.2.4 Selecting the Output Capacitors
        5. 9.3.2.5 Selecting the Compensation Capacitor, CComp1
        6. 9.3.2.6 Selecting the Compensation Capacitor, CComp2
      3. 9.3.3 Application Curves
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 サード・パーティ製品に関する免責事項
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 ドキュメントの更新通知を受け取る方法
    4. 10.4 サポート・リソース
    5. 10.5 Trademarks
    6. 10.6 静電気放電に関する注意事項
    7. 10.7 用語集
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Tape and Reel Information

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発注情報

7.3.6.1 Output Voltage Setpoint

During initialization, the device reads the state of the VSETx pins and selects the default output voltage according to Table 7-2. Note that the VSETx pins also select the I2C target address of the device and the setting of the VRANGE bits located in register CONTROL2. The VSETx pins are only read during a power cycle of VIN or by setting RESET = 1 through the I2C interface. Changing the configuration after VIN is present does not affect the content of the registers or the I2C address. Make sure that there is no stray current path connected to the VSETx pins and that the parasitic capacitance between the VSETx pins and GND is less than 100pF. For proper operation, the input voltage must be at least 1.4V above the selected output voltage.

Table 7-2 Start-Up Output Voltage and I2C Address

VSET3

VSET2

VSET1

I2C ADDRESS

VRANGE [1:0]

VOUT VOLTAGE

GND

GND

VIN

0x40

0b10

0.45V

GND

VIN

GND

0x40

0b10

0.50V

GND

VIN

VIN

0x40

0b10

0.55V

VIN

GND

GND

0x40

0b10

0.60V

VIN

GND

VIN

0x40

0b10

0.65V

VIN

VIN

GND

0x40

0b10

0.70V

VIN

VIN

VIN

0x40 (1)

0b10

0.75V

47kΩ to GND

GND

GND

0x41 (1)

0b11

0.80V

47kΩ to GND

GND

VIN

0x41

0b11

0.85V

47kΩ to GND

VIN

GND

0x41

0b11

0.90V

47kΩ to GND

VIN

VIN

0x41

0b11

0.95V

47kΩ to VIN

GND

GND

0x41

0b11

1.00V

47kΩ to VIN

GND

VIN

0x41 (1)

0b11

1.05V

47kΩ to VIN

VIN

GND

0x41 (1)

0b11

1.10V

47kΩ to VIN

VIN

VIN

0x41

0b11

1.15V

GND

47kΩ to GND

GND

0x42 (1)

0b11

1.20V

GND

47kΩ to GND

VIN

0x42

0b11

1.25V

GND

47kΩ to VIN

GND

0x42

0b11

1.30V

GND

47kΩ to VIN

VIN

0x42

0b11

1.35V

VIN

47kΩ to GND

GND

0x42

0b11

1.40V

VIN

47kΩ to GND

VIN

0x42

0b11

1.45V

VIN

47kΩ to VIN

GND

0x42

0b11

1.50V

VIN

47kΩ to VIN

VIN

0x42

0b11

1.55V

GND

GND

47kΩ to GND

0x43

0b11

1.60V

GND

GND

47kΩ to VIN

0x43

0b11

1.65V

GND

VIN

47kΩ to GND

0x43

0b11

1.70V

GND

VIN

47kΩ to VIN

0x43

0b11

1.75V

VIN

GND

47kΩ to GND

0x43

0b11

1.80V

VIN

GND

47kΩ to VIN

0x43

0b11

1.85V

VIN

VIN

47kΩ to GND

0x43

0b11

1.90V

VIN

VIN

47kΩ to VIN

0x43

0b11

1.95V

47kΩ to GND

47kΩ to GND

GND

0x40

0b11

2.00V

47kΩ to GND

47kΩ to GND

VIN

0x40

0b11

2.05V

47kΩ to GND

47kΩ to VIN

GND

0x40

0b11

2.10V

47kΩ to GND

47kΩ to VIN

VIN

0x40

0b11

2.15V

47kΩ to VIN

47kΩ to GND

GND

0x40

0b11

2.20V

47kΩ to VIN

47kΩ to GND

VIN

0x40

0b11

2.25V

47kΩ to VIN

47kΩ to VIN

GND

0x40

0b11

2.30V

47kΩ to VIN

47kΩ to VIN

VIN

0x40

0b11

2.35V

47kΩ to GND

GND

47kΩ to GND

0x41

0b11

2.40V

47kΩ to GND

GND

47kΩ to VIN

0x41

0b11

2.45V

47kΩ to GND

VIN

47kΩ to GND

0x41

0b11

2.50V

47kΩ to GND

VIN

47kΩ to VIN

0x41

0b11

2.55V

47kΩ to VIN

GND

47kΩ to GND

0x41

0b11

2.60V

47kΩ to VIN

GND

47kΩ to VIN

0x41

0b11

2.65V

47kΩ to VIN

VIN

47kΩ to GND

0x41

0b11

2.70V

47kΩ to VIN

VIN

47kΩ to VIN

0x41

0b11

2.75V

GND

47kΩ to GND

47kΩ to GND

0x42

0b11

2.80V

GND

47kΩ to GND

47kΩ to VIN

0x42

0b11

2.85V

GND

47kΩ to VIN

47kΩ to GND

0x42

0b11

2.90V

GND

47kΩ to VIN

47kΩ to VIN

0x42

0b11

2.95V

VIN

47kΩ to GND

47kΩ to GND

0x42

0b11

3.00V

VIN

47kΩ to GND

47kΩ to VIN

0x42

0b11

3.05V

VIN

47kΩ to VIN

47kΩ to GND

0x42

0b11

3.10V

VIN

47kΩ to VIN

47kΩ to VIN

0x42

0b11

3.15V

47kΩ to GND

47kΩ to GND

47kΩ to GND

0x43

0b11

3.20V

47kΩ to GND

47kΩ to GND

47kΩ to VIN

0x43

0b11

3.25V

47kΩ to GND

47kΩ to VIN

47kΩ to GND

0x43

0b11

3.30V

47kΩ to GND

47kΩ to VIN

47kΩ to VIN

0x43

0b11

3.35V

47kΩ to VIN

47kΩ to GND

47kΩ to GND

0x44

0b10

0.75V

GND

GND

GND

0x40

0b11

0.80V

47kΩ to VIN

47kΩ to GND

47kΩ to VIN

0x44

0b11

1.05V

47kΩ to VIN

47kΩ to VIN

47kΩ to GND

0x44

0b11

1.10V

47kΩ to VIN

47kΩ to VIN

47kΩ to VIN

0x44

0b11

1.20V
(1)

A second I2C address for the same output voltage is found at the bottom of this table

During start-up, the output voltage ramps up to the target value set by the VSETx pins before ramping up or down to any new value programmed to the device over the I2C interface. If the user programs new output voltage setpoints (VOUT[7:0]), output voltage range (VRANGE[1:0]), or soft-start time (SSTIME[1:0]) settings when the device has already begun the soft-start sequence, the device ignores the new values until the soft-start sequence is complete. When changing VOUT[7:0], VRAMP[1:0], or SSTIME[1:0] while EN is low, the device uses the new values the next time the device is enabled.