SLVSDP3 December   2016 TPS54262-EP

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 DC Electrical Characteristics
    6. 6.6 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  Unregulated Input Voltage
      2. 7.3.2  Regulated Output Voltage
      3. 7.3.3  Regulation and Feedback Voltage
      4. 7.3.4  Enable and Shutdown
      5. 7.3.5  Soft Start
      6. 7.3.6  Oscillator Frequency
        1. 7.3.6.1 Selecting the Switching Frequency
        2. 7.3.6.2 Synchronization With External Clock
      7. 7.3.7  Slew Rate Control
      8. 7.3.8  Reset
      9. 7.3.9  Reset Delay
      10. 7.3.10 Reset Threshold and Undervoltage Threshold
      11. 7.3.11 Overvoltage Supervisor
      12. 7.3.12 Noise Filter on RST_TH and OV_TH Terminals
      13. 7.3.13 Boot Capacitor
      14. 7.3.14 Short Circuit Protection
      15. 7.3.15 Overcurrent Protection
      16. 7.3.16 Internal Undervoltage Lockout (UVLO)
      17. 7.3.17 Thermal Shutdown (TSD)
      18. 7.3.18 Loop Control Frequency Compensation - Type 3
        1. 7.3.18.1 Bode Plot of Converter Gain
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode Continuous Conduction Mode (CCM)
      2. 7.4.2 Active Mode Discontinuous Conduction Mode (DCM)
      3. 7.4.3 Pulse Skip Mode (PSM)
      4. 7.4.4 Low-Power Mode (LPM)
      5. 7.4.5 Hysteretic Mode
      6. 7.4.6 Output Tolerances in Different Modes of Operation
  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 Component Selection
          1. 8.2.2.1.1  Input Capacitors (C1, C11)
          2. 8.2.2.1.2  Output Capacitor (C4, C12)
          3. 8.2.2.1.3  Soft-Start Capacitor (C6)
          4. 8.2.2.1.4  Bootstrap Capacitor (C3)
          5. 8.2.2.1.5  Power-On Reset Delay (PORdly) Capacitor (C2)
          6. 8.2.2.1.6  Output Inductor (L1)
          7. 8.2.2.1.7  Flyback Schottky Diode (D2)
          8. 8.2.2.1.8  Resistor to Set Slew Rate (R7)
          9. 8.2.2.1.9  Resistor to Select Switching Frequency (R8)
          10. 8.2.2.1.10 Resistors to Select Output Voltage (R4, R5)
          11. 8.2.2.1.11 Resistors to Set Undervoltage, Overvoltage, and Reset Thresholds (R1, R2, R3)
            1. 8.2.2.1.11.1 Overvoltage Resistor Selection
            2. 8.2.2.1.11.2 Reset Threshold Resistor Selection
            3. 8.2.2.1.11.3 Undervoltage Threshold for Low-Power Mode and Load Transient Operation
          12. 8.2.2.1.12 Low-Power Mode (LPM) Threshold
          13. 8.2.2.1.13 Enable Pin Pull-Up Resistor (R11) and Voltage Divider Resistor (R10)
          14. 8.2.2.1.14 Pull-Up Resistor (R12) at RST Pin
          15. 8.2.2.1.15 Type 3 Compensation Components (R5, R6, R9, C5, C7, C8)
            1. 8.2.2.1.15.1 Resistors
            2. 8.2.2.1.15.2 Capacitors
          16. 8.2.2.1.16 Noise Filter on RST_TH and OV_TH Terminals (C9, C10)
        2. 8.2.2.2 Design Example 1
          1. 8.2.2.2.1  Calculate the Switching Frequency (fsw)
          2. 8.2.2.2.2  Calculate the Ripple Current (IRipple)
          3. 8.2.2.2.3  Calculate the Inductor Value (L1)
          4. 8.2.2.2.4  Calculate the Output Capacitor and ESR (C4)
            1. 8.2.2.2.4.1 Calculate Capacitance
            2. 8.2.2.2.4.2 Calculate ESR
          5. 8.2.2.2.5  Calculate the Feedback Resistors (R4, R5)
          6. 8.2.2.2.6  Calculate Type 3 Compensation Components
            1. 8.2.2.2.6.1 Resistances (R6, R9)
            2. 8.2.2.2.6.2 Capacitors (C5, C8, C7)
          7. 8.2.2.2.7  Calculate Soft-Start Capacitor (C6)
          8. 8.2.2.2.8  Calculate Bootstrap Capacitor (C3)
          9. 8.2.2.2.9  Calculate Power-On Reset Delay Capacitor (C2)
          10. 8.2.2.2.10 Calculate Input Capacitor (C1, C11)
          11. 8.2.2.2.11 Calculate Resistors to Control Slew Rate (R7)
          12. 8.2.2.2.12 Resistors to Select Undervoltage, Overvoltage and Reset Threshold Values (R1, R2, R3)
          13. 8.2.2.2.13 Diode D1 and D2 Selection
          14. 8.2.2.2.14 Noise Filter on RST_TH and OV_TH Terminals (C9 and C10)
          15. 8.2.2.2.15 Power Budget and Temperature Estimation
        3. 8.2.2.3 Design Example 2
          1. 8.2.2.3.1  Calculate the Switching Frequency (fsw)
          2. 8.2.2.3.2  Calculate the Ripple Current (IRipple)
          3. 8.2.2.3.3  Calculate the Inductor Value (L1)
          4. 8.2.2.3.4  Calculate the Output Capacitor and ESR (C4, C12)
            1. 8.2.2.3.4.1 Calculate Capacitance
            2. 8.2.2.3.4.2 Calculate ESR
          5. 8.2.2.3.5  Calculate the Feedback Resistors (R4, R5)
          6. 8.2.2.3.6  Calculate Type 3 Compensation Components
            1. 8.2.2.3.6.1 Resistances (R6, R9)
            2. 8.2.2.3.6.2 Capacitors (C5, C8, C7)
          7. 8.2.2.3.7  Calculate Soft-Start Capacitor (C6)
          8. 8.2.2.3.8  Calculate Bootstrap Capacitor (C3)
          9. 8.2.2.3.9  Calculate Power-On Reset Delay Capacitor (C2)
          10. 8.2.2.3.10 Calculate Input Capacitor (C1, C11)
          11. 8.2.2.3.11 Calculate Resistors to Control Slew Rate (R7)
          12. 8.2.2.3.12 Resistors to Select Undervoltage, Overvoltage and Reset Threshold Values (R1, R2, R3)
          13. 8.2.2.3.13 Diode D1 and D2 Selection
          14. 8.2.2.3.14 Noise Filter on RST_TH and OV_TH Terminals (C9 and C10)
          15. 8.2.2.3.15 Power Budget and Temperature Estimation
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Power Dissipation and Temperature Considerations
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

11 Device and Documentation Support

11.1 Receiving Notification of Documentation Updates

To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed. For change details, review the revision history included in any revised document.

11.2 Community Resources

The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use.

    TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers.
    Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support.

11.3 Trademarks

PowerPAD, E2E are trademarks of Texas Instruments.

All other trademarks are the property of their respective owners.

11.4 Electrostatic Discharge Caution

esds-image

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

11.5 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.