JAJSJU3B May   2020  – June 2021 TPS543820

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  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 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  VIN Pins and VIN UVLO
      2. 7.3.2  Enable and Adjustable UVLO
      3. 7.3.3  Adjusting the Output Voltage
      4. 7.3.4  Switching Frequency Selection
      5. 7.3.5  Switching Frequency Synchronization to an External Clock
        1. 7.3.5.1 Internal PWM Oscillator Frequency
        2. 7.3.5.2 Loss of Synchronization
        3. 7.3.5.3 Interfacing the SYNC/FSEL Pin
      6. 7.3.6  Ramp Amplitude Selection
      7. 7.3.7  Soft Start and Prebiased Output Start-up
      8. 7.3.8  Mode Pin
      9. 7.3.9  Power Good (PGOOD)
      10. 7.3.10 Current Protection
        1. 7.3.10.1 Positive Inductor Current Protection
        2. 7.3.10.2 Negative Inductor Current Protection
      11. 7.3.11 Output Overvoltage and Undervoltage Protection
      12. 7.3.12 Overtemperature Protection
      13. 7.3.13 Output Voltage Discharge
    4. 7.4 Device Functional Modes
      1. 7.4.1 Forced Continuous-Conduction Mode
      2. 7.4.2 Discontinuous Conduction Mode during Soft Start
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 1.0-V Output, 1-MHz Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Switching Frequency
          2. 8.2.1.2.2  Output Inductor Selection
          3. 8.2.1.2.3  Output Capacitor
          4. 8.2.1.2.4  Input Capacitor
          5. 8.2.1.2.5  Adjustable Undervoltage Lockout
          6. 8.2.1.2.6  Output Voltage Resistors Selection
          7. 8.2.1.2.7  Bootstrap Capacitor Selection
          8. 8.2.1.2.8  BP5 Capacitor Selection
          9. 8.2.1.2.9  PGOOD Pullup Resistor
          10. 8.2.1.2.10 Current Limit Selection
          11. 8.2.1.2.11 Soft-Start Time Selection
          12. 8.2.1.2.12 Ramp Selection and Control Loop Stability
          13. 8.2.1.2.13 MODE Pin
        3. 8.2.1.3 Application Curves
      2. 8.2.2 1.0-V Output, 1.5-MHz Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
      3. 8.2.3 3.3-V Output, 1.0-MHz Application
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
      1. 10.2.1 Thermal Performance
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 サポート・リソース
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

6.6 Typical Characteristics

TA = 25°C
TA = 25°CGUID-20201210-CA0I-DM9L-KMQN-LZDKZXR2GQBR-low.gif
L = 470 nH, 2.5 mΩ typical
Figure 6-1 Efficiency vs Output Current. TA = 25°C
GUID-20201210-CA0I-6WJF-XJ3L-PX9CD1FG1HS3-low.gif
L = 470 nH, 2.5 mΩ typical
Figure 6-3 Efficiency vs Output Current
GUID-20201210-CA0I-ZMMZ-5QVV-NWTXGJF4HPKN-low.gif
VIN = 12 V fSW = 1.0 MHz
Figure 6-5 Efficiency vs Output Current – 1.8-V to 5.0-V Output
GUID-20201211-CA0I-MXRG-DBT8-2TNBXMJ92W63-low.gif
VIN = 12 V  fSW = 1.0 MHz TA = 25 °C
Figure 6-7 Junction Temperature vs Output Current – 1-V Output
GUID-20201105-CA0I-GBLN-L6BJ-8XHTW6FD7JSG-low.gif
 
Figure 6-9 Regulated FB Voltage vs Junction Temperature
GUID-20201105-CA0I-F8B6-5S2R-S7R5FBDPM24R-low.gif
VEN = 1.3 V
Figure 6-11 EN Pin Current vs Junction Temperature
GUID-20201210-CA0I-TVMW-K9HB-8M4844GGR8H2-low.gif
L = 470 nH, 2.5 mΩ typical
Figure 6-2 Power Loss vs Output Current
GUID-20201210-CA0I-14PX-RFCC-R8KM49B0BFLQ-low.gif
L = 470 nH, 2.5 mΩ typical
Figure 6-4 Power Loss vs Output Current
GUID-20201210-CA0I-9MRC-1KZM-SBDQDX7P9WWF-low.gif
VIN = 12 V fSW = 1.0 MHz
Figure 6-6 Power Loss vs Output Current – 1.8-V to 5.0-V Output
GUID-20201211-CA0I-KKT9-ZJNC-P6G3QGNS8FXQ-low.gif
VIN = 12 V  fSW = 1.0 MHz TA = 25 °C
Figure 6-8 Junction Temperature vs Output Current – 3.3-V Output
GUID-20201105-CA0I-ZP7D-WL5M-34MLT9W9QS4Z-low.gif
VEN = 1.1 V
Figure 6-10 EN Pin Current vs Junction Temperature