JAJS933L September   1998  – June 2016 LM2672

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 改訂履歴
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics - 3.3 V
    6. 7.6  Electrical Characteristics - 5 V
    7. 7.7  Electrical Characteristics - 12 V
    8. 7.8  Electrical Characteristics - Adjustable
    9. 7.9  Electrical Characteristics - All Output Voltage Versions
    10. 7.10 Typical Characteristics
    11. 7.11 Typical Characteristics - Fixed Output Voltage Versions
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Switch Output
      2. 9.3.2 C Boost
      3. 9.3.3 SYNC
      4. 9.3.4 Feedback
    4. 9.4 Device Functional Modes
      1. 9.4.1 ON/OFF
      2. 9.4.2 Shutdown Mode
      3. 9.4.3 Active Mode
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Typical Application for Fixed Output Voltage Versions
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Inductor Selection (L1)
          2. 10.2.1.2.2 Output Capacitor Selection (COUT)
          3. 10.2.1.2.3 Catch Diode Selection (D1)
          4. 10.2.1.2.4 Input Capacitor (CIN)
          5. 10.2.1.2.5 Boost Capacitor (CB)
          6. 10.2.1.2.6 Soft-Start Capacitor (CSS, Optional)
          7. 10.2.1.2.7 Frequency Synchronization (Optional)
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Typical Application for Adjustable Output Voltage Versions
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
          1. 10.2.2.2.1 Programming Output Voltage
          2. 10.2.2.2.2 Inductor Selection (L1)
          3. 10.2.2.2.3 Output Capacitor SeIection (COUT)
          4. 10.2.2.2.4 Catch Diode Selection (D1)
          5. 10.2.2.2.5 Input Capacitor (CIN)
          6. 10.2.2.2.6 Boost Capacitor (CB)
        3. 10.2.2.3 Application Curve
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 WSON Package Devices
    2. 12.2 Layout Examples
  13. 13デバイスおよびドキュメントのサポート
    1. 13.1 ドキュメントのサポート
      1. 13.1.1 関連資料
    2. 13.2 ドキュメントの更新通知を受け取る方法
    3. 13.3 コミュニティ・リソース
    4. 13.4 商標
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 Glossary
  14. 14メカニカル、パッケージ、および注文情報
    1. 14.1 DAP (WSONパッケージ)

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

5 Description (continued)

A family of standard inductors for use with the LM2672 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the datasheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.

Other features include ±1.5%-tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50 μA stand-by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.