SLVSFS3B September   2020  – July 2021 TPS62868 , TPS62869

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  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 I2C InterfaceTiming Characteristics
    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 Save Mode
      2. 8.3.2 Forced PWM Mode
      3. 8.3.3 100% Duty Cycle Mode Operation
      4. 8.3.4 Start-up
      5. 8.3.5 Switch Current Limit and HICCUP Short-Circuit Protection
      6. 8.3.6 Undervoltage Lockout (UVLO)
      7. 8.3.7 Thermal Warning and Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable and Disable (EN)
      2. 8.4.2 Output Discharge
      3. 8.4.3 Start-Up Output Voltage and I2C Target Address Selection
        1. 8.4.3.1 TPS6286xxA Devices
        2. 8.4.3.2 TPS6286xxxC Devices
      4. 8.4.4 Select Output Voltage Registers (VID)
      5. 8.4.5 Power Good ( PG)
    5. 8.5 Programming
      1. 8.5.1 Serial Interface Description
      2. 8.5.2 Standard-, Fast-, and 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. 8.6 Register Map
      1. 8.6.1 Target Address Byte
      2. 8.6.2 Register Address Byte
      3. 8.6.3 VOUT Register 1
      4. 8.6.4 VOUT Register 2
      5. 8.6.5 CONTROL Register
      6. 8.6.6 STATUS Register
  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 Setting The Output Voltage
        2. 9.2.2.2 Output Filter Design
        3. 9.2.2.3 Inductor Selection
        4. 9.2.2.4 Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 Typical Application – TPS6286x0A and TPS6286x0xC Devices
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
        1. 9.3.2.1 Setting the Output Voltage
        2. 9.3.2.2 Output Filter Design
        3. 9.3.2.3 Inductor Selection
        4. 9.3.2.4 Capacitor Selection
      3. 9.3.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
      1. 11.2.1 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Support Resources
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Trademarks
    6. 12.6 Glossary
    7. 12.7 Electrostatic Discharge Caution
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.4.3.1 TPS6286xxA Devices

During the enable delay (tDelay), the start-up output voltage and device I2C target address are set by an external resistor connected to the VSET/VID pin through an internal R2D (resistor to digital) converter. Table 8-1 shows the options.

Table 8-1 Start-up Output Voltage and I2C Target Address Options
RESISTOR (E96 SERIES, ±1% ACCURACY) AT VSET/VIDSTART-UP OUTPUT VOLTAGE (TYP)I2C TARGET ADDRESS
249 kΩVoltage Factor * 1.15 V0b1000110 (0x46)
205 kΩVoltage Factor * 1.10 V0b1000101 (0x45)
162 kΩVoltage Factor * 1.05 V0b1000100 (0x44)
133 kΩVoltage Factor * 1.00 V0b1000011 (0x43)
105 kΩVoltage Factor * 0.95 V0b1000010 (0x42)
86.6 kΩVoltage Factor * 0.90 V0b1000001 (0x41)
68.1 kΩVoltage Factor * 0.85 V0b1001000 (0x48)
56.2 kΩVoltage Factor * 0.80 V0b1001001 (0x49)
44.2 kΩVoltage Factor * 0.75 V0b1001010 (0x4A)
36.5 kΩVoltage Factor * 0.70 V0b1001011 (0x4B)
28.7 kΩVoltage Factor * 0.65 V0b1001100 (0x4C)
23.7 kΩVoltage Factor * 0.60 V0b1001101 (0x4D)
18.7 kΩVoltage Factor * 0.55 V0b1001110 (0x4E)
15.4 kΩVoltage Factor * 0.50 V0b1001111 (0x4F)
12.1 kΩVoltage Factor * 0.45 V0b1000000 (0x40)
10 kΩVoltage Factor * 0.40 V0b1000111 (0x47)
Table 8-2 Device Option Voltage Factors
DEVICE OPTION VOLTAGE FACTOR
TPS6286x0A 0.5
TPS6286x1A 1
TPS6286x2A 2

The R2D converter has an internal current source which applies current through the external resistor, and an internal ADC which reads back the resulting voltage level. Depending on the level, the correct start-up output voltage and I2C target address are set. Once this R2D conversion is finished, the current source is turned off to avoid current flowing through the external resistor. Ensure that there is no additional current path or capacitance greater than 30 pF from this pin to GND during R2D conversion, otherwise a false value is set.