SNVSB87 November   2018 LM3880-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simple Power Supply Sequencing
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  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
      1. 6.5.1 Timing Requirements
    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 Enable Pin Operation
      2. 7.3.2 Incomplete Sequence Operation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power Up With EN Pin
      2. 7.4.2 Power Down With EN Pin
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Open Drain Flags Pullup
      2. 8.1.2 Enable the Device
    2. 8.2 Typical Application
      1. 8.2.1 Simple Sequencing of Three Power Supplies
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Sequencing Using Independent Flag Supply
    3. 8.3 Do's and Don'ts
  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. 11.1.2 Device Nomenclature
    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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Detailed Design Procedure

Table 2. Bill of Materials

DESIGNATOR DESCRIPTION DEVICE QUANTITY MANUFACTURER
U1 LM3880-Q1, Sequence 1, 30 ms timing LM3880-Q1 1 Texas Instruments
R1 100-kΩ Resistor, 0603 CRCW0603100KFKEA 1 Vishay
R2 100-kΩ Resistor, 0603 CRCW0603100KFKEA 1 Vishay
R3 100-kΩ Resistor, 0603 CRCW0603100KFKEA 1 Vishay

This application uses the Sequence 1 and 30-ms timing options of the Simple Power Supply Sequencer. See Application Curves for details on the sequence and timing option.