JAJS626O April   2000  – June 2016 LM2673

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 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: LM2673 - 3.3 V
    6. 6.6  Electrical Characteristics: LM2673 - 5 V
    7. 6.7  Electrical Characteristics: LM2673 - 12 V
    8. 6.8  Electrical Characteristics: LM2673 - Adjustable
    9. 6.9  Electrical Characteristics - All Output Voltage Versions
    10. 6.10 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 Switch Output
      2. 7.3.2 Input
      3. 7.3.3 C Boost
      4. 7.3.4 Ground
      5. 7.3.5 Current Adjust
      6. 7.3.6 Feedback
    4. 7.4 Device Functional Modes
      1. 7.4.1 Soft-Start
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Design Considerations
      2. 8.1.2 Inductor
      3. 8.1.3 Output Capacitor
      4. 8.1.4 Input Capacitor
      5. 8.1.5 Catch Diode
      6. 8.1.6 Boost Capacitor
      7. 8.1.7 RADJ, Adjustable Current Limit
      8. 8.1.8 CSS Soft-Start Capacitor
      9. 8.1.9 Additional Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Application for All Output Voltage Versions
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Capacitor Selection Guides
          2. 8.2.1.2.2 Inductor Selection Guide
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Fixed Output Voltage Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Capacitor Selection
      3. 8.2.3 Adjustable Output Design Example
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
          1. 8.2.3.2.1 Capacitor Selection
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 関連資料
    2. 11.2 ドキュメントの更新通知を受け取る方法
    3. 11.3 コミュニティ・リソース
    4. 11.4 商標
    5. 11.5 静電気放電に関する注意事項
    6. 11.6 Glossary
  12. 12メカニカル、パッケージ、および注文情報
    1. 12.1 DAP (VSON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 Pin Configuration and Functions

KTW Package
7-Pin TO-263
Top View
NDZ Package
7-Pin TO-220
Top View
NHM Package
14-Pin VSON
Top View
Connect DAP to pin 9 on PCB.

Pin Functions

PIN I/O DESCRIPTION
NAME TO-263,
TO-220		 VSON
Switch output 1 12, 13, 14 O Source pin of the internal High Side FET. This is a switching node. Attached this pin to an inductor and the cathode of the external diode.
Input 2 2, 3 I Supply input pin to collector pin of high side FET. Connect to power supply and input bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN and GND must be as short as possible.
CB 3 4 I Boot-strap capacitor connection for high-side driver. Connect a high quality 100-nF capacitor from CB to VSW Pin.
GND 4 9 — Power ground pins. Connect to system ground. Ground pins of CIN and COUT. Path to CIN must be as short as possible.
Current adjust 5 6 I Current Limit adjust pin. Connect a resistor from this pin to GND to set the current limit of the part.
FB 6 7 I Feedback sense input pin. Connect to the midpoint of feedback divider to set VOUT for ADJ version or connect this pin directly to the output capacitor for a fixed output version.
SS 7 8 I Soft-start pin. Connect a capacitor from this pin to GND to control the output voltage ramp. If the feature not desired, the pin can be left floating
NC — 1, 5, 10, 11 — No connect pins