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

1 Features

  • Fixed 3.3-V, 5-V, 12-V, and 15-V Options with ±5% Regulation (Max) Over Line, Load, and Temperature Conditions
  • Adjustable Option With a Range of 1.23 V to 37 V (57 V for HV Version) and ±4% Regulation (Max) Over Line, Load, and Temperature Conditions
  • Specified 1-A Output Current
  • Wide Input Voltage Range
    • 4.75 V to 40 V (60 V for HV Version)
  • Requires Only Four External Components (Fixed Versions) and Uses Readily Available Standard Inductors
  • 52-kHz (Typ) Fixed-Frequency Internal Oscillator
  • TTL Shutdown Capability With 50-μA (Typ) Standby Current
  • High Efficiency
    • As High as 88% (Typ)
  • Thermal Shutdown and Current-Limit Protection with Cycle-by-Cycle Current Limiting

2 Applications

  • Simple High-Efficiency Step-Down (Buck) Regulators
  • Pre-Regulators for Linear Regulators
  • On-Card Switching Regulators
  • Positive-to-Negative Converters (Buck-Boost)

3 Description

The TL2575 and TL2575HV devices provide all the active functions needed for a step-down (buck) switching regulator in an integrated circuit. They require four to six external components for operation. They accept a wide input-voltage range of up to 60 V (TL2575-HV) and are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, or an adjustable-output version. The TL2575 and TL2575HV devices have an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation. The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown. In addition, a manual shutdown is available via an external ON/OFF pin.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TL2575, TL2575HV PDIP (16) 19.31 mm x 6.35 mm
TO-263 (5) 10.16 mm x 8.93 mm
TO-220 (5) 10.16 mm x 8.82 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

4 Functional Block Diagram

fbd_lvs618.gif
Pin numbers are for the KTT (TO-263) package.