SLUS714E January   2007  – June 2019 TPS40077

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simplified Application Diagram
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Electrical Characteristics
    5. 6.5 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Minimum Pulse Duration
      2. 7.3.2  Slew Rate Limit On VDD
      3. 7.3.3  Setting The Switching Frequency (Programming The Clock Oscillator)
      4. 7.3.4  Loop Compensation
      5. 7.3.5  Shutdown and Sequencing
      6. 7.3.6  Boost and LVBP Bypass Capacitance
      7. 7.3.7  Internal Regulators
      8. 7.3.8  Power Dissipation
      9. 7.3.9  Boost Diode
      10. 7.3.10 Synchronous Rectifier Control
    4. 7.4 Programming
      1. 7.4.1 Programming The Ramp Generator Circuit and UVLO
      2. 7.4.2 Programming Soft Start
      3. 7.4.3 Programming Short-Circuit Protection
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Buck Regulator 8-V to 16-V Input, 1.8-V Output at 10 A
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Power Train Components
            1. 8.2.1.2.1.1  Output Inductor, LOUT
            2. 8.2.1.2.1.2  Output Capacitor, COUT, ELCO and MLCC
            3. 8.2.1.2.1.3  Input Capacitor, CIN ELCO and MLCC
            4. 8.2.1.2.1.4  Switching MOSFET, QSW
            5. 8.2.1.2.1.5  Rectifier MOSFET, QSR
            6. 8.2.1.2.1.6  Timing Resistor, RT
            7. 8.2.1.2.1.7  Feed-Forward and UVLO Resistor, RKFF
            8. 8.2.1.2.1.8  Soft-Start Capacitor, CSS
            9. 8.2.1.2.1.9  Short-Circuit Protection, RILIM and CILIM
            10. 8.2.1.2.1.10 Boost Voltage, CBOOST and DBOOST (Optional)
            11. 8.2.1.2.1.11 Closing the Feedback Loop, RZ1, RP1, RPZ2, RSET1, RSET2, CZ2, CP2, and CPZ1
        3. 8.2.1.3 Application Curves
    3. 8.3 Additional System Examples
  9. Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Community Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Typical Characteristics

TPS40077 ibias_v_tmp_lvs676.gifFigure 1. LVBP Voltage vs Junction Temperature
TPS40077 vdbp1_v_tmp_lvs676.gifFigure 3. DBP Voltage vs Junction Temperature
TPS40077 ilimof_v_tmp_lvs676.gifFigure 5. Current Limit Offset Voltage
vs Junction Temperature
TPS40077 vfb_v_tmp_lvs676.gifFigure 7. Feedback Regulation Voltage
vs Junction Temperature
TPS40077 dmax_v_tmp_lvs676.gifFigure 9. Maximum Duty Cycle
vs Junction Temperature
TPS40077 ruvlo_v_tmp_lvs676.gifFigure 11. Programmable UVLO Threshold
vs Junction Temperature
TPS40077 ibiass_v_tmp_lvs676.gifFigure 13. Error Amplifier Input Bias Current
vs Junction Temperature
TPS40077 g017_lus714.gifFigure 15. Switching Frequency
vs Timing Resistance
TPS40077 rkff5_lus582.gifFigure 17. Undervoltage Lockout Threshold
vs Feed-Forward Impedance
TPS40077 g023_lus714.gifFigure 19. Typical Maximum Duty Cycle
vs Input Voltage
TPS40077 g025_lus714.gifFigure 21. Input Voltage vs Low-Voltage Bypass Voltage
TPS40077 vdbp_v_tmp_lvs676.gifFigure 2. DBP Voltage vs Junction Temperature
TPS40077 vdrp_v_tmp_lvs676.gifFigure 4. Bootstrap Diode Voltage
vs Junction Temperature
TPS40077 ilim_v_tmp_lvs676.gifFigure 6. Current Limit Sink Current
vs Junction Temperature
TPS40077 fsw_v_vdd_lvs676.gifFigure 8. Switching Frequency vs Input Voltage
TPS40077 vuvlo_v_tmp_lvs676.gifFigure 10. Undervoltage Lockout
vs Junction Temperature
TPS40077 iss_v_tmp_lvs676.gifFigure 12. Soft-Start Charging Current
vs Junction Temperature
TPS40077 mino_v_freq_lus676.gifFigure 14. Minimum Output Voltage vs Frequency
TPS40077 rkff3_lus582.gifFigure 16. Undervoltage Lockout Threshold
vs Feed-Forward Impedance
TPS40077 rkff7_lus582.gifFigure 18. Undervoltage Lockout Threshold
vs Feed-Forward Impedance
TPS40077 g024_lus714.gifFigure 20. DBP Voltage vs Input Voltage