SNVS069E February   2000  – January 2022 LM2767

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 Parameter Measurement Information
    1. 7.1 Test Circuit
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Positive Voltage Doubler
        2. 9.2.2.2 Capacitor Selection
        3. 9.2.2.3 Paralleling Devices
        4. 9.2.2.4 Cascading Devices
        5. 9.2.2.5 Regulating VOUT
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9.2.2.5 Regulating VOUT

It is possible to regulate the output of the LM2767 by use of a low dropout regulator (such as LP2980-5.0). The whole converter is depicted in Figure 9-5.

A different output voltage is possible by use of LP2980-3.3, LP2980-3.0, or LP2980-ADJ.

The following conditions must be satisfied simultaneously for worst case design:

Equation 6. 2VIN_MIN > VOUT_MIN + VDROP_MAX (LP2980) + IOUT_MAX × ROUT_MAX
Equation 7. 2VIN_MAX < VOUT_MAX + VDROP_MIN (LP2980) + IOUT_MIN × ROUT_MIN
GUID-853361F4-3BAD-41A7-9751-C32BB7C22FEC-low.pngFigure 9-5 Generate a Regulated 5-V From 3-V Input Voltage