SNVS188I May   2004  – October 2017 LM2623

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  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
    6. 6.6 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 Gated Oscillator Control Scheme.
      2. 7.3.2 Cycle-To-Cycle Pfm
      3. 7.3.3 Shutdown
      4. 7.3.4 Internal Current Limit And Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Pulse Frequency Modulation (Pfm)
      2. 7.4.2 Low Voltage Start-Up
  8. 8 Applications 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 Non-Linear Effect
        2. 8.2.2.2 Choosing The Correct C3 Capacitor
        3. 8.2.2.3 Setting The Output Voltage
        4. 8.2.2.4 VDD Supply
        5. 8.2.2.5 Setting The Switching Frequency
        6. 8.2.2.6 Output Diode Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Boost Output Capacitor Placement
      2. 10.1.2 Schottky Diode Placement
      3. 10.1.3 Boost Input / VDD Capacitor Placement
    2. 10.2 Layout Example
    3. 10.3 WSON Package Devices
  11. 11Device And Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, And Orderable Information

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

NHE Package
14-Pin WSON
Top View
LM2623 20038802.png
DGK Package
8-Pin VSSOP
Top View
LM2623 20038818.png

Pin Functions

PIN TYPE DESCRIPTION
WSON VSSOP NAME
1 — NC N/A No Connect
2, 3 1 PGND GND Power Ground (WSON Pins 2 and 3 must be shorted together).
4 2 EN Digital Active-Low Shutdown Input
5 3 FREQ Analog Frequency Adjust. An external resistor connected between this pin and a voltage source sets the switching frequency of the LM2623.
6 4 FB Analog Output Voltage Feedback
7 — NC N/A No Connect
8 — NC N/A No connect
9 5 SGND GND Signal Ground
10 6 VDD Power Power Supply for Internal Circuitry
11 7 BOOT Analog Bootstrap Supply for the Gate Drive of Internal MOSFET Power Switch
12, 13 8 SW Analog Drain of the Internal MOSFET Power Switch. (WSON pins 12 and 13 must be shorted together.)
14 — NC N/A No Connect
DAP — DAP Thermal To be soldered to board for enhanced thermal dissipation. To be electrically isolated/floating.
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