JAJSG02D August   2012  – August 2018 LMZ21700

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      概略回路図
      2.      VIN = 12Vでの効率
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1. Table 1. Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling 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 Package Construction
    4. 7.4 Feature Description
      1. 7.4.1 Input Under Voltage Lockout
      2. 7.4.2 Enable Input (EN)
      3. 7.4.3 Softstart and Tracking Function (SS)
      4. 7.4.4 Power Good Function (PG)
      5. 7.4.5 Output Voltage Setting
      6. 7.4.6 Output Current Limit and Output Short Circuit Protection
      7. 7.4.7 Thermal Protection
    5. 7.5 Device Functional Modes
      1. 7.5.1 PWM Mode Operation
      2. 7.5.2 PSM 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 Input Capacitor (CIN)
        2. 8.2.2.2 Output Capacitor (COUT)
        3. 8.2.2.3 Softstart Capacitor (CSS)
        4. 8.2.2.4 Power Good Resistor (RPG)
        5. 8.2.2.5 Feedback Resistors (RFBB and RFBT)
      3. 8.2.3 Application Curves
        1. 8.2.3.1 VOUT = 1.2 V
        2. 8.2.3.2 VOUT = 1.8 V
        3. 8.2.3.3 VOUT = 2.5 V
        4. 8.2.3.4 VOUT = 3.3 V
        5. 8.2.3.5 VOUT = 5.0 V
    3. 8.3 Do's and Don'ts
  9. 9 Power Supply Recommendations
    1. 9.1 Voltage Range
    2. 9.2 Current Capability
    3. 9.3 Input Connection
      1. 9.3.1 Voltage Drops
      2. 9.3.2 Stability
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Minimize the High di/dt Loop Area
      2. 10.1.2 Protect the Sensitive Nodes in the Circuit
      3. 10.1.3 Provide Thermal Path and Shielding
    2. 10.2 Layout Example
      1. 10.2.1 High Density Layout Example for Space Constrained Applications
        1. 10.2.1.1 35 mm² Solution Size (Single Sided)
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 デバイス・サポート
    2. 11.2 開発サポート
      1. 11.2.1 WEBENCH®ツールによるカスタム設計
    3. 11.3 ドキュメントの更新通知を受け取る方法
    4. 11.4 コミュニティ・リソース
    5. 11.5 商標
    6. 11.6 静電気放電に関する注意事項
    7. 11.7 Glossary
  12. 12メカニカル、パッケージ、および注文情報
    1. 12.1 Tape and Reel Information

パッケージ・オプション

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

メカニカル・データ（パッケージ｜ピン）
  • SIL|8
サーマルパッド・メカニカル・データ
発注情報

8.2.3.2 VOUT = 1.8 V

LMZ21700 TYP_SCH_00.gifFigure 32. Typical Applications Circuit
LMZ21700 D015_LMZ21700_25C_1.8VOUT_EFFICIENCY_LOG_SNVS872.gifFigure 34. Efficiency VOUT = 1.8 V
LMZ21700 LMZ21700_1.8VOUT_LOAD_TRANS_100mA_to_650mA_snvs872.gifFigure 36. Load Transient VOUT = 1.8 V
LMZ21700 LMZ21700_1.8VOUT_RIPPLE_20MHzBW_snvs872.gifFigure 38. 20MHz Oscilloscope Bandwidth
Output Voltage Ripple VOUT = 1.8 V
LMZ21700 LMZ21700_FSW_1.8VOUT_snvs872.pngFigure 40. Typical Switching Frequency at 650mA Load VOUT = 1.8 V
LMZ21700 D016_LMZ21700_25C_1.8VOUT_LINE_AND_LOAD_REG_LOG_SNVS872.gifFigure 42. Line and Load Regulation VOUT = 1.8 V
LMZ21700 1.8V_BOM_snvs872.gifFigure 33. External Component Values
(VOUT =1.8V)
LMZ21700 LMZ21700_25C_1.8VOUT_POWER_DISSIPATION_snvs872.pngFigure 35. Power Dissipation VOUT = 1.8 V
LMZ21700 LMZ21700_1.8VOUT_STARTUP_snvs872.gifFigure 37. Startup VOUT = 1.8 V
LMZ21700 LMZ21700_1.8VOUT_RIPPLE_500MHzBW_snvs872.gifFigure 39. 500MHz Oscilloscope Bandwidth, 3x1000pF additional output capacitance
Output Voltage Ripple and HF Noise VOUT = 1.8 V
LMZ21700 LMZ21700_ICL_1.8V_85C_snvs872.pngFigure 41. Typical Current Limit VOUT = 1.8 V, TA = 85 °C
LMZ21700 LMZ21700SIL_1.8VO_47CperW_snvs872.pngFigure 43. Thermal Derating for θJA=47ºC/W, VOUT = 1.8 V