ZHCS536O September   2008  – August 2015 LM22677 , LM22677-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings: LM22677
    3. 6.3 ESD Ratings: LM22677-Q1
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics
    7. 6.7 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 Precision Enable and UVLO
      2. 7.3.2 Soft-Start
      3. 7.3.3 Switching Frequency Adjustment and Synchronization
      4. 7.3.4 Self Synchronization
      5. 7.3.5 Boot-Strap Supply
      6. 7.3.6 Internal Compensation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Current Limit
      2. 7.4.2 Thermal Protection
      3. 7.4.3 Duty-Cycle Limits
  8. 8 Applications and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Output Voltage Divider Selection
      2. 8.1.2 Power Diode
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Components
        2. 8.2.2.2 Inductor
        3. 8.2.2.3 Input Capacitor
        4. 8.2.2.4 Output Capacitor
        5. 8.2.2.5 Boot-Strap Capacitor
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11器件和文档支持
    1. 11.1 文档支持
      1. 11.1.1 相关文档　
    2. 11.2 相关链接
    3. 11.3 商标
    4. 11.4 静电放电警告
    5. 11.5 Glossary
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5 Pin Configuration and Functions

NDR Package
7-Pin TO-263
Top View
LM22677 LM22677-Q1 30074102.gif

Pin Functions

PIN TYPE(1) DESCRIPTION APPLICATION INFORMATION
NAME NO.
SW 1 O Switch output Switching output of regulator
VIN 2 I Input voltage Supply input to the regulator
BOOT 3 I Bootstrap input Provides the gate voltage for the high side N-FET
GND 4 — Ground input to regulator; system common System ground pin
RT/SYNC 5 I Oscillator mode control input Used to control oscillator mode of regulator. See Switching Frequency Adjustment and Synchronization section of data sheet.
FB 6 I Feedback input Feedback input to regulator
EN 7 I Enable input Used to control regulator start-up and shutdown. See Precision Enable and UVLO section of data sheet.
EP EP — Exposed Pad Connect to ground. Provides thermal connection to PCB. See Applications and Implementation.
(1) O = Output, I = Input, G = Ground, P = Power