JAJSO21B February   2022  – November 2022 TPSM82903

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 Mode Selection and Device Configuration (MODE/S-CONF)
      2. 7.3.2 Adjustable VO Operation (External Voltage Divider)
      3. 7.3.3 Setable VO Operation (VSET and Internal Voltage Divider)
      4. 7.3.4 Soft Start/Tracking (SS/TR)
      5. 7.3.5 Smart Enable with Precise Threshold
      6. 7.3.6 Power Good (PG)
      7. 7.3.7 Undervoltage Lockout (UVLO)
      8. 7.3.8 Current Limit And Short Circuit Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Pulse Width Modulation (PWM) Operation
      2. 7.4.2 AEE (Automatic Efficiency Enhancement)
      3. 7.4.3 Power Save Mode Operation (Auto PFM/PWM)
      4. 7.4.4 100% Duty-Cycle Operation
      5. 7.4.5 Output Discharge Function
      6. 7.4.6 Starting into a Pre-Biased Load
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application with Adjustable Output Voltage
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Programming the Output Voltage
        3. 8.2.2.3 Capacitor Selection
          1. 8.2.2.3.1 Output Capacitor
          2. 8.2.2.3.2 Input Capacitor
          3. 8.2.2.3.3 Soft-Start Capacitor
        4. 8.2.2.4 Tracking Function
      3. 8.2.3 Application Curves
    3. 8.3 Typical Application with Setable VO Using VSET
      1. 8.3.1 Design Requirements
      2. 8.3.2 Detailed Design Procedure
      3. 8.3.3 Application Curves
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
        1. 8.5.2.1 Thermal Considerations
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 サポート・リソース
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.3.3 Application Curves



VIN = 12 V 1-MHz Auto PFM/PWM IO = 1 A
VOUT = 0.4 V TA = 25°C
Figure 8-48 Output Voltage Ripple


VIN = 12 V 1-MHz FPWM IO = 1 A
VOUT = 0.4 V TA = 25°C
Figure 8-50 Output Voltage Ripple


VIN = 3 V–17 V Temp = –40°C to 150°C
Figure 8-52 Output Voltage Accuracy – VSET Selected


Auto PFM/PWM Fsw = 2.5 MHz
Figure 8-54 Efficiency vs Output Current
VOUT = 0.4 V


Auto PFM/PWM Fsw = 1 MHz
Figure 8-56 Switching Frequency vs Input Voltage
VOUT = 0.4 V


FPWM Fsw = 1 MHz
Figure 8-58 Switching Frequency vs Input Voltage
VOUT = 0.4 V


Auto PFM/PWM Fsw = 2.5 MHz
Figure 8-60 Output Voltage vs Output Current
VOUT = 5.5 V


VIN = 12 V 1-MHz Auto PFM/PWM IO = 100 mA
VOUT = 0.4 V TA = 25°C
Figure 8-49 Output Voltage Ripple


VIN = 12 V 1-MHz FPWM IO = 100 mA
VOUT = 0.4 V TA = 25°C
Figure 8-51 Output Voltage Ripple


Auto PFM/PWM Fsw = 1 MHz
Figure 8-53 Efficiency vs Output Current
VOUT = 0.4 V


FPWM Fsw = 1 MHz
Figure 8-55 Efficiency vs Output Current
VOUT = 0.4 V


Auto PFM/PWM Fsw = 2.5 MHz
Figure 8-57 Switching Frequency vs Input Voltage
VOUT = 0.4 V


Auto PFM/PWM Fsw = 1 MHz
Figure 8-59 Output Voltage vs Output Current
VOUT = 1.2 V