SLVS638C January   2006  – November 2014

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Functional Block Diagram
  5. Revision History
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics — TL2575
    6. 7.6 Electrical Characteristics — TL2575HV
    7. 7.7 Typical Characteristics
  8. Parameter Measurement Information
    1. 8.1 Test Circuits
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Feedback Connection
      2. 9.3.2 ON/OFF Input
    4. 9.4 Device Functional Modes
      1. 9.4.1 Standby Mode
  10. 10Application and Implementation
    1. 10.1 Typical Application
      1. 10.1.1 Design Requirements
      2. 10.1.2 Detailed Design Procedure
        1. 10.1.2.1 Input Capacitor (CIN)
        2. 10.1.2.2 Output Capacitor (COUT)
        3. 10.1.2.3 Catch Diode
        4. 10.1.2.4 Inductor
        5. 10.1.2.5 Output Voltage Ripple and Transients
        6. 10.1.2.6 Grounding
        7. 10.1.2.7 Reverse Current Considerations
        8. 10.1.2.8 Buck Regulator Design Procedure
        9. 10.1.2.9 Inductor Selection Guide
      3. 10.1.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

12 Layout

12.1 Layout Guidelines

With any switching regulator, circuit layout plays an important role in circuit performance. Wiring and parasitic inductances, as well as stray capacitances, are subjected to rapidly switching currents, which can result in unwanted voltage transients. To minimize inductance and ground loops, the length of the leads indicated by heavy lines should be minimized. Optimal results can be achieved by single-point grounding (see Figure 11) or by ground-plane construction. For the same reasons, the two programming resistors used in the adjustable version should be located as close as possible to the regulator to keep the sensitive feedback wiring short.

12.2 Layout Example

tl2575layout3.gifFigure 20. Layout Diagram (KV Package)