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

9.2.2.4 Cascading Devices

Cascading the several LM2767 devices is an easy way to produce a greater voltage (a two-stage cascade circuit is shown in Figure 9-4).

The effective output resistance is equal to the weighted sum of each individual device:

Equation 5. ROUT = 1.5 ROUT_1 + ROUT_2

Note that increasing the number of cascading stages is practically limited because it significantly reduces the efficiency, increases the output resistance and output voltage ripple.

GUID-6026FFE6-C368-4B5B-9945-C93D48DAE826-low.pngFigure 9-4 Increasing Output Voltage By Cascading Devices