SNVS239C October   2004  – October 2015 LM3475

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Ratings
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Hysteretic Control Circuit
      2. 7.3.2 Soft-Start
      3. 7.3.3 Under Voltage Detection
      4. 7.3.4 PGATE
      5. 7.3.5 Minimum On or Off Time
      6. 7.3.6 Enable Pin (EN)
    4. 7.4 Device Functional Modes
  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 Setting Output Voltage
        2. 8.2.2.2 Setting Operating Frequency and Output Ripple
        3. 8.2.2.3 Using a Feed-forward Capacitor
        4. 8.2.2.4 Inductor Selection
        5. 8.2.2.5 Output Capacitor Selection
        6. 8.2.2.6 Input Capacitor Selection
        7. 8.2.2.7 Diode Selection
        8. 8.2.2.8 P-Channel MOSFET Selection
        9. 8.2.2.9 Reducing Switching Noise
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
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订购信息

5 Pin Configuration and Functions

DBV Package
5-Pin SOT-23
Top View
LM3475 20070102.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
FB 1 I Feedback input. Connect to a resistor divider between the output and GND.
GND 2 G Ground.
EN 3 O Enable. Pull this pin above 1.5 V (typical) for normal operation. When EN is low, the device enters shutdown mode.
VIN 4 P Power supply input.
PGATE 5 O Gate drive output for the external PFET.