ZHCSS97H september   1998  – june 2023 LM2676

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 说明（续）
  7. 6 Pin Configuration and Functions
  8. 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 Version
    6. 7.6  Electrical Characteristics – 5-V Version
    7. 7.7  Electrical Characteristics – 12-V Version
    8. 7.8  Electrical Characteristics – Adjustable Voltage Version
    9. 7.9  Electrical Characteristics – All Output Voltage Versions
    10. 7.10 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Adjustable Output Voltage
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Fixed Output Voltage Typical Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Custom Design with WEBENCH® Tools
          2. 9.2.1.2.2 Inductor Selection (L1)
          3. 9.2.1.2.3 Output Capacitor Selection (COUT)
          4. 9.2.1.2.4 Catch Diode Selection (D1)
          5. 9.2.1.2.5 Input Capacitor (CIN)
          6. 9.2.1.2.6 Boost Capacitor (CB)
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Adjustable Output Voltage Typical Application
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Programming Output Voltage
          2. 9.2.2.2.2 Inductor Selection (L1)
          3. 9.2.2.2.3 Output Capacitor Selection (COUT)
          4. 9.2.2.2.4 Catch Diode Selection (D1)
          5. 9.2.2.2.5 Input Capacitor (CIN)
          6. 9.2.2.2.6 Boost Capacitor (CB)
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Typical Application for All Output Voltage Versions
        1. 9.2.3.1 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 WSON Package Devices
      2. 9.4.2 Layout Examples
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 Custom Design with WEBENCH® Tools
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 接收文档更新通知
    4. 10.4 支持资源
    5. 10.5 Trademarks
    6. 10.6 静电放电警告
    7. 10.7 术语表
  12. 11Mechanical, Packaging, and Orderable Information

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机械数据 (封装 | 引脚)
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订购信息

7.9 Electrical Characteristics – All Output Voltage Versions

TJ = 25°C, VIN = 12 V for the 3.3-V, 5-V, and adjustable versions and VIN = 24 V for the 12-V version, and ILOAD = 100 mA (unless otherwise noted)
PARAMETERSTEST CONDITIONSMINTYPMAXUNIT
DEVICE PARAMETERS
IQQuiescent currentVFEEDBACK = 8 V for 3.3-V, 5-V, and adjustable voltage versions2.53.6mA
VFEEDBACK = 15 V for 12-V versions2.5mA
ISTBYStandby quiescent currentON/ OFF pin = 0 VTJ = 25°C50100μA
TJ = –40°C to 125°C150
ICLCurrent limitTJ = 25°C0.620.81.2A
TJ = –40°C to 125°C0.5751.25
ILOutput leakage currentVIN = 40 V, ON/ OFF pin = 0 V, VSWITCH = 0 V125μA
VSWITCH = −1 V, ON/ OFF pin = 0 V615mA
RDS(ON)Switch ON-resistanceISWITCH = 500 mATJ = 25°C0.250.4Ω
TJ = –40°C to 125°C0.6
fOOscillator frequencyMeasured at switch pinTJ = 25°C260kHz
TJ = –40°C to 125°C225275
DMaximum duty cycle95%
Minimum duty cycle0%
IBIASFeedback bias currentVFEEDBACK = 1.3 V (adjustable version only)85nA
VS/DON/ OFF pin voltage thresholdTurnon threshold, rising(1)TJ = 25°C1.4V
TJ = –40°C to 125°C0.82
IS/DON/ OFF pin currentON/ OFF pin = 0 VTJ = 25°C20μA
TJ = –40°C to 125°C737
(1) The ON/ OFF pin is internally pulled up to 7 V and can be left floating for always-on operation.