SLVSGG8A November   2023  – July 2024 TPS6287B10 , TPS6287B15 , TPS6287B20 , TPS6287B25

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Fixed-Frequency DCS-Control Topology
      2. 8.3.2  Forced-PWM and Power-Save Modes
      3. 8.3.3  Transient Non-Synchronous Mode (optional)
      4. 8.3.4  Precise Enable
      5. 8.3.5  Start-Up
      6. 8.3.6  Switching Frequency Selection, Only Applies to TPS6287BxxJE2
      7. 8.3.7  Output Voltage Setting
        1. 8.3.7.1 Output Voltage Range
        2. 8.3.7.2 Output Voltage Setpoint
        3. 8.3.7.3 Non-Default Output Voltage Setpoint
        4. 8.3.7.4 Dynamic Voltage Scaling
        5. 8.3.7.5 Droop Compensation
      8. 8.3.8  Compensation (COMP)
      9. 8.3.9  Mode Selection / Clock Synchronization (MODE/SYNC)
      10. 8.3.10 Spread Spectrum Clocking (SSC)
      11. 8.3.11 Output Discharge
      12. 8.3.12 Undervoltage Lockout (UVLO)
      13. 8.3.13 Overvoltage Lockout (OVLO)
      14. 8.3.14 Overcurrent Protection
        1. 8.3.14.1 Cycle-by-Cycle Current Limiting
        2. 8.3.14.2 Hiccup Mode
        3. 8.3.14.3 Current-Limit Mode
      15. 8.3.15 Power Good (PG)
        1. 8.3.15.1 Standalone / Primary Device Behavior
        2. 8.3.15.2 Secondary Device Behavior
      16. 8.3.16 Remote Sense
      17. 8.3.17 Thermal Warning and Shutdown
      18. 8.3.18 Stacked Operation
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-On Reset
      2. 8.4.2 Undervoltage Lockout
      3. 8.4.3 Standby
      4. 8.4.4 On
    5. 8.5 Programming
      1. 8.5.1 Serial Interface Description
      2. 8.5.2 Standard-, Fast-, Fast-Mode Plus Protocol
      3. 8.5.3 HS-Mode Protocol
      4. 8.5.4 I2C Update Sequence
      5. 8.5.5 I2C Register Reset
      6. 8.5.6 Dynamic Voltage Scaling (DVS)
  10. 9 Device Registers
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Inductor Selection
        2. 10.2.2.2 Selecting the Input Capacitors
        3. 10.2.2.3 Selecting the Compensation Resistor
        4. 10.2.2.4 Selecting the Output Capacitors
        5. 10.2.2.5 Selecting the Compensation Capacitor CC
        6. 10.2.2.6 Selecting the Compensation Capacitor CC2
      3. 10.2.3 Application Curves
    3. 10.3 Typical Application - TPS6287BxV Devices
      1. 10.3.1 Design Requirements for TPS6287BxV
    4. 10.4 Typical Application Using Two TPS6287B25 in a Stacked Configuration
      1. 10.4.1 Design Requirements For Two Stacked Devices
      2. 10.4.2 Detailed Design Procedure
        1. 10.4.2.1 Selecting the Compensation Resistor
        2. 10.4.2.2 Selecting the Output Capacitors
        3. 10.4.2.3 Selecting the Compensation Capacitor CC
      3. 10.4.3 Application Curves for Two Stacked Devices
    5. 10.5 Typical Application Using Three TPS6287B25 in a Stacked Configuration
      1. 10.5.1 Application Curves
    6. 10.6 Power Supply Recommendations
    7. 10.7 Layout
      1. 10.7.1 Layout Guidelines
      2. 10.7.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.7.2 Output Voltage Setpoint

Together with the selected range, the VSET[7:0] bits in the VSET register control the output voltage setpoint of the device (see Table 8-4).

Table 8-4 Start-Up Voltage Settings
VRANGE[1:0]Output Voltage Setpoint
0b000.4V + VSET[7:0] × 1.25mV
0b010.4V + VSET[7:0] × 2.5mV
0b10 (default)0.4V + VSET[7:0] × 5mV
0b110.4V + VSET[7:0] × 5mV

During initialization, the device reads the state of the VSET1 and VSET2 pins and selects the default output voltage according to . Note that the VSET1 and VSET2 pins also selects the I2C target address of the device (see below). Please see the DEVICE OPTIONS table for the complete list of device versions and their Output Voltage Setpoint.

Table 8-5 Default Output Voltage Setpoints for TPS6287BxxL

VSET1 pin

VSET2 pin

I2C Device AddressOutput Voltage Setpoint

Short Circuit to GND

Short Circuit to GND

0x45

400mV

Short Circuit to GND

6.2kΩ to GND

0x44

425mV

Short Circuit to GND

47kΩ to VIN

0x47

450mV

Short Circuit to GNDShort Circuit to VIN

0x46

475mV

6.2kΩ to GNDShort Circuit to GND

0x45

500mV

6.2kΩ to GND6.2kΩ to GND

0x44

525mV

6.2kΩ to GND47kΩ to VIN

0x47

550mV

6.2kΩ to GNDShort Circuit to VIN

0x46

575mV

47kΩ to VINShort Circuit to GND0x45

600mV

47kΩ to VIN6.2kΩ to GND0x44

625mV

47kΩ to VIN47kΩ to VIN0x47

650mV

47kΩ to VINShort Circuit to VIN0x46

675mV

Short Circuit to VINShort Circuit to GND0x45

700mV

Short Circuit to VIN6.2kΩ to GND0x44

725mV

Short Circuit to VIN47kΩ to VIN0x47

750mV

Short Circuit to VINShort Circuit to VIN0x46

775mV

Table 8-6 Default Output Voltage Setpoints for TPS6287BxxH

VSET1 pin

VSET2 pin

I2C Device AddressOutput Voltage Setpoint

Short Circuit to GND

Short Circuit to GND

0x45

800mV

Short Circuit to GND

6.2kΩ to GND

0x44

850mV

Short Circuit to GND

47kΩ to VIN

0x47

900mV

Short Circuit to GNDShort Circuit to VIN

0x46

950mV

6.2kΩ to GNDShort Circuit to GND

0x45

1000mV

6.2kΩ to GND6.2kΩ to GND

0x44

1050mV

6.2kΩ to GND47kΩ to VIN

0x47

1100mV

6.2kΩ to GNDShort Circuit to VIN

0x46

1150mV

47kΩ to VINShort Circuit to GND0x45

1200mV

47kΩ to VIN6.2kΩ to GND0x44

1250mV

47kΩ to VIN47kΩ to VIN0x47

1300mV

47kΩ to VINShort Circuit to VIN0x46

1350mV

Short Circuit to VINShort Circuit to GND0x45

1400mV

Short Circuit to VIN6.2kΩ to GND0x44

1450mV

Short Circuit to VIN47kΩ to VIN0x47

1500mV

Short Circuit to VINShort Circuit to VIN0x46

1550mV

Table 8-7 Default Voltage Setpoints for TPS6287BxxV
VSET4=LOWVSET4=HIGH

VSET1 pin

VSET2 pin

VSET3=LOWVSET3=HIGHVSET3=LOWVSET3=HIGH

Short Circuit to GND

Short Circuit to GND

400 mV

425 mV

900 mV

925 mV

Short Circuit to GND

6.2kΩ to GND

450 mV

475 mV

950 mV

975 mV

Short Circuit to GND

47kΩ to VIN

500 mV

525 mV

1000 mV

1025 mV

Short Circuit to GNDShort Circuit to VIN

550 mV

575 mV

1050 mV

1075 mV

6.2kΩ to GNDShort Circuit to GND

600mV

625 mV

1100 mV

1125 mV

6.2kΩ to GND6.2kΩ to GND

650 mV

675 mV

1150 mV

1175 mV
6.2kΩ to GND47kΩ to VIN

700 mV

725 mV

1200 mV

1225 mV

6.2kΩ to GNDShort Circuit to VIN

750 mV

775 mV

1250 mV

1275 mV

47kΩ to VINShort Circuit to GND

800 mV

825 mV

1300 mV

1325 mV

47kΩ to VIN6.2kΩ to GND

850 mV

875 mV

1350 mV

1375 mV

47kΩ to VIN47kΩ to VIN

900 mV

925 mV

1400 mV

1425 mV

47kΩ to VINShort Circuit to VIN

950 mV

975 mV

1450 mV

1475 mV

Short Circuit to VINShort Circuit to GND

1000 mV

1025 mV

1500 mV

1525 mV

Short Circuit to VIN6.2kΩ to GND

1050 mV

1075 mV

1550 mV

1575 mV

Short Circuit to VIN47kΩ to VIN

1100 mV

1125 mV

1600 mV

1625 mV

Short Circuit to VINShort Circuit to VIN

1150 mV

1175 mV

1650 mV

1675 mV

Table 8-8 Default Output Voltage Setpoints for TPS6287BxxJE2
VSEL Pin(1) VSET[7:0]

I2C Device Address

 Output Voltage Setpoint
6.2kΩ to GND 0x50

0x44

 800mV
Short-Circuit to GND 0x50

0x45

 800mV
Short-Circuit to VIN 0x5F

0x46

 875mV
47kΩ to VIN 0x50

0x47

800mV

If you program new output voltage setpoint (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. For example, if you change the value of VSET[7:0] during soft-start, the device first ramps to the value that VSET[7:0] had when the soft-start sequence began and then, when soft-start is complete, ramps up or down to the new value.

If you change VOUT[7:0], VRAMP[1:0], or SSTIME[1:0] while EN is low, the device uses the new values the next time you enable it.

During start-up the output voltage ramps up to the target value set by the VSET1 and VSET2 pins before ramping up or down to any new value programmed to the device over the I2C interface.

1.

For reliable voltage setting, make sure that there is no stray current path connected to the VSEL pin and that the parasitic capacitance between the VSET1 and VSET2 pins and GND is less than 30pF.