SLVSHJ8 February   2024 TPS61299-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Boost Control Operation
      2. 6.3.2  Version Detection
      3. 6.3.3  Under-voltage Lockout
      4. 6.3.4  Switching Frequency
      5. 6.3.5  Input Current Limit
      6. 6.3.6  Enable and Disable
      7. 6.3.7  Soft-Start Timing
      8. 6.3.8  Down Mode
      9. 6.3.9  Pass-Through Operation
      10. 6.3.10 Output Short-to-Ground Protection
      11. 6.3.11 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Fast Load Transient Mode and Normal Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application-Li-ion Battery to 5V Boost Converter Under Fast Mode
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Maximum Output Current
        2. 7.2.2.2 Inductor Selection
        3. 7.2.2.3 Output Capacitor Selection
        4. 7.2.2.4 Input Capacitor Selection
      3. 7.2.3 Application Curves
    3. 7.3 Typical Application-Li-ion Battery to 5V Boost Converter Under Normal Mode
      1. 7.3.1 Design Requirements
      2. 7.3.2 Application Curves
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
      3. 7.5.3 Thermal Information
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

6.3.1 Boost Control Operation

The TPS61299-Q1 boost converter is controlled by a hysteretic current mode controller. This controller regulates the output voltage by keeping the inductor ripple current constant in the range of 350mA and adjusting the valley current of this inductor depending on the output load. Since the input voltage, output voltage and inductor value all affect the rising and falling slopes of inductor ripple current, the switching frequency is not fixed and is determined by the operation condition. If the required average input current is lower than the average inductor current defined by this constant ripple, the inductor current goes discontinuously to keep the efficiency high under light load condition. If the load current is reduced further, the boost converter enters into Burst mode. In Burst mode, the boost converter ramps up the output voltage with several switching cycles. Once the output voltage exceeds a setting threshold (Vout_target + 50mV in normal mode and Vout_target + 25mV in fast load transient mode), the device stops switching and goes into a sleep status. In sleep status, the device consumes less quiescent current, 95nA. The boost converter resumes switching when the output voltage is below the setting threshold ( Vout_target + 25mV in normal mode and Vout_target + 10mV in fast load transient mode). The device exits the Burst mode when the output current can no longer be supported in this mode.

GUID-20230316-SS0I-DPBZ-NFRV-W2XTCSWB5MWS-low.svgFigure 6-2 Control Modes under Different Load