SLVSFQ7A December   2020  – December 2021 TPS55288-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Timing Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  VCC Power Supply
      2. 7.3.2  Operation Mode Setting
      3. 7.3.3  Input Undervoltage Lockout
      4. 7.3.4  Enable and Programmable UVLO
      5. 7.3.5  Soft Start
      6. 7.3.6  Shutdown and Load Discharge
      7. 7.3.7  Switching Frequency
      8. 7.3.8  Switching Frequency Dithering
      9. 7.3.9  Inductor Current Limit
      10. 7.3.10 Internal Charge Path
      11. 7.3.11 Output Voltage Setting
      12. 7.3.12 Output Current Monitoring and Cable Voltage Droop Compensation
      13. 7.3.13 Integrated Gate Drivers
      14. 7.3.14 Output Current Limit
      15. 7.3.15 Overvoltage Protection
      16. 7.3.16 Output Short Circuit Protection
      17. 7.3.17 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 PWM Mode
      2. 7.4.2 Power Save Mode
    5. 7.5 Programming
      1. 7.5.1 Data Validity
      2. 7.5.2 START and STOP Conditions
      3. 7.5.3 Byte Format
      4. 7.5.4 Acknowledge (ACK) and Not Acknowledge (NACK)
      5. 7.5.5 Slave Address and Data Direction Bit
      6. 7.5.6 Single Read and Write
      7. 7.5.7 Multi-Read and Multi-Write
    6. 7.6 Register Maps
      1. 7.6.1 REF Register (Address = 0h, 1h) [reset = 11010010h, 00000000h]
      2. 7.6.2 IOUT_LIMIT Register (Address = 2h) [reset = 11100100h]
      3. 7.6.3 VOUT_SR Register (Address = 3h) [reset = 00000001h]
      4. 7.6.4 VOUT_FS Register (Address = 4h) [reset = 00000011h]
      5. 7.6.5 CDC Register (Address = 5h) [reset = 11100000h]
      6. 7.6.6 MODE Register (Address = 6h) [reset = 00100000h]
      7. 7.6.7 STATUS Register (Address = 7h) [reset = 00000011h]
      8. 7.6.8 Register Summary
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Switching Frequency
        3. 8.2.2.3 Output Voltage Setting
        4. 8.2.2.4 Inductor Selection
        5. 8.2.2.5 Input Capacitor
        6. 8.2.2.6 Output Capacitor
        7. 8.2.2.7 Output Current Limit
        8. 8.2.2.8 Loop Stability
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
        1. 11.1.2.1 Custom Design With WEBENCH® Tools
    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
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.6.6 MODE Register (Address = 6h) [reset = 00100000h]

MODE is shown in Figure 7-21 and described in Table 7-10.

Return to Summary Table.

MODE controls the operating mode of the TPS55288-Q1.

Figure 7-21 MODE Register
76543210
OEFSWHICCUPDISCHGVCCI2CADDPFMMODE
R/W-0bR/W-0bR/W-1bR/W-0bR/W-0bR/W-0bR/W-0bR/W-0b
Table 7-10 MODE Register Field Descriptions
BitFieldTypeResetDescription
7OER/W0bOutput enable

0b = Output disabled (Default)

1b = Output enable

6FSWDBLR/W0bSwitching frequency doubling in buck-boost mode

TI does not recommend using double frequency function at switching frequency above 1.6 MHz.

0b = Keep the switching frequency unchanged during buck-boost mode (Default)

1b = Double the switching frequency during buck-boost mode

5HICCUPR/W1bHiccup mode

0b = Disable the hiccup during output short circuit protection.

1b = Enable the hiccup during output short circuit protection (Default)

4DISCHGR/W0bOutput discharge

0b = Disabled VOUT discharge when the device is in shutdown mode (Default)

1b = Enable VOUT discharge. VOUT is discharged to ground by an internal 100-mA current sink

3VCCR/W0bVCC option

0b = Select internal LDO for VCC (Default)

1b = Select external 5-V power supply for VCC

2I2CADDR/W0bI2C address

0b = Set I2C slave address to 74h (Default)

1b = Set I2C slave address to 75h

1PFMR/W0bSelect operating mode at light load condition

0b = PFM operating mode at light load condition (Default)

1b = FPWM operating mode at light load condition

0MODER/W0bMode control approach

0b = Set VCC, I2CADD, and PFM controlled by external resistor (Default)

1b = Set VCC, I2CADD, and PFM controlled by internal register