SLLS636N December   2004  – January 2015 MC33063A , MC34063A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Description
  3. 3 Simplified Schematic
  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—Oscillator
    6. 6.6 Electrical Characteristics—Output Switch
    7. 6.7 Electrical Characteristics—Comparator
    8. 6.8 Electrical Characteristics—Total Device
    9. 6.9 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Standard operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 External Switch Configurations for Higher Peak Current
    2. 8.2 Typical Application
      1. 8.2.1 Voltage-Inverting Converter Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Performance
      2. 8.2.2 Step-Up Converter Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Performance
      3. 8.2.3 Step-Down Converter Application
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Performance
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

10 Layout

10.1 Layout Guidelines

Keep feedback loop layout trace lengths to a minimum to avoid unnecessary IR drop. In addition, the loop for the decoupling capacitor at the input should be as small as possible. The trace from VIN to pin 1 of the device should be thicker to handle the higher current.

10.2 Layout Example

mc33063layout.gifFigure 12. Layout Example for a Step-Down Converter