SLUS720F February   2007  – June 2019 TPS40195

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Application Diagram
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Electrical Characteristics
    5. 7.5 Dissipation Ratings
    6. 7.6 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  Enable Functionality
      2. 8.3.2  Voltage Reference
      3. 8.3.3  Oscillator and Synchronization
      4. 8.3.4  Undervoltage Lockout (UVLO)
      5. 8.3.5  Soft Start
      6. 8.3.6  Selecting the Short Circuit Threshold
      7. 8.3.7  5-V Regulator
      8. 8.3.8  Prebias Start-up
      9. 8.3.9  Drivers
      10. 8.3.10 Power Good
      11. 8.3.11 Thermal Shutdown
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Application 1
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Output Inductor, LOUT
          2. 9.2.1.2.2 Output Capacitor, COUT
          3. 9.2.1.2.3 Input Capacitor, CIN
          4. 9.2.1.2.4 Switching MOSFET, QSW
          5. 9.2.1.2.5 Rectifier MOSFET, QSR
          6. 9.2.1.2.6 Component Selection for the TPS40195
            1. 9.2.1.2.6.1 Timing Resistor, RT
            2. 9.2.1.2.6.2 Setting UVLO
            3. 9.2.1.2.6.3 Setting the Soft-Start Time
            4. 9.2.1.2.6.4 Short-Circuit Protection, RILIM
            5. 9.2.1.2.6.5 Voltage Decoupling Capacitors, CBP, and CVDD
            6. 9.2.1.2.6.6 Boost Voltage, CBOOST and DBOOST (optional)
            7. 9.2.1.2.6.7 Closing the Feedback Loop RZ1, RP1, RPZ2, RSET1, RSET2, CZ2, CP2 AND CPZ1
          7. 9.2.1.2.7 Application Curve
      2. 9.2.2 Typical Application 2
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Typical Application 3
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
        3. 9.2.3.3 Application Curves
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Device Support
      1. 11.2.1 Related Parts
    3. 11.3 Documentation Support
      1. 11.3.1 Related Documentation
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

9.2.3.1 Design Requirements

Table 5. Example 3 Bill of Materials

QTY RefDes Value Description Size Part Number MFR
1 C1 22 μF Capacitor, Aluminun, 16V, X7R, 20% 1210 Std TDK
2 C2 22 μF Capacitor, Ceramic, 16V, XR5, 20% 1210 Std TDK
1 C4 4700 pF Capacitor, Ceramic, 25V, X7R, 20% 0402 Std Std
1 C5 10 pF Capacitor, Ceramic, 25V, X7R, 20% 0402 Std Std
2 C6, C7 100 nF Capacitor, Ceramic, 25V, X7R, 20% 0603 Std Std
1 C8 2.2 nF Capacitor, Ceramic, 25V, X7R, 20% 0402 Std Std
1 C12 4.7 μF Capacitor, Ceramic, 6.3V, X5R, 20% 0603 Std Std
1 C13 10 pF Capacitor, Ceramic, 25V, X7R, 20% 0603 Std Std
1 C14 470 pF Capacitor, Ceramic, 25V, X7R, 20% 0402 Std Std
4 C15 10 μF Capacitor, Ceramic, 6.3V, X5R, 20% 0805 C2012X5R0J106M TDK
1 L2 15 μH Inductor, SMT, 4.2A, 24 mΩ, 0.394 × 0.3941 inch SLF120565T-150M4R2-PF TDK
1 Q1 SP8K4 XSTR, MOSFET, Dual N-Ch,30V, 9A SOP-8 SP8K4 Rohm
1 Q2 2N7002DICT MOSFET, N-Ch, 60V, 115mA, 1.2Ω SOT-23 2N7002DICT Vishay
1 R2 24.3 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
1 R3 178 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
1 R5 11 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
1 R7 10.1 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
1 R9 39 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
1 R10 2.2 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
2 R11, R13 51 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
1 R14 20 kΩ Resistor, Chip, 1/16W, x% 0402 Std Std
1 U1 TPS40195PW 4.5-V to 20-V Synchronous Buck Controller TSSOP-16 TPS40195PW TI