SNVS572E July   2008  – January 2016 LM25037 , LM25037-Q1

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: LM25037
    3. 6.3 ESD Ratings: LM25037-Q1
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 High-Voltage Start-Up Regulator
      2. 7.3.2 Line Undervoltage Detector
      3. 7.3.3 Reference
      4. 7.3.4 Error Amplifier
      5. 7.3.5 Cycle-By-Cycle Current Limit
      6. 7.3.6 Overload Protection Timer
      7. 7.3.7 Soft-Start
      8. 7.3.8 PWM Comparator
      9. 7.3.9 RAMP Pin
    4. 7.4 Device Functional Modes
      1. 7.4.1 Feed-Forward Voltage Mode
      2. 7.4.2 Current Mode
      3. 7.4.3 Oscillator
      4. 7.4.4 Sync Capability
      5. 7.4.5 Gate Driver Outputs (OUTA and OUTB)
      6. 7.4.6 Thermal Protection
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Topology and Control Algorithm Choice
      2. 8.1.2 Voltage Mode Control Using the LM25037
      3. 8.1.3 Current Mode Control Using the LM25037
      4. 8.1.4 VIN and VCC
      5. 8.1.5 Applications With >75-V Input
      6. 8.1.6 Current Sense
      7. 8.1.7 UVLO Divider Selection
      8. 8.1.8 Hiccup Mode Current Limit Restart (RES)
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Oscillator Frequency and Maximum Duty Cycle
        2. 8.2.2.2  Power Stage Design
        3. 8.2.2.3  UVLO Setting
        4. 8.2.2.4  VIN, VCC, Start-Up
        5. 8.2.2.5  Current Sense Resistor
        6. 8.2.2.6  Current-Mode Control
        7. 8.2.2.7  Slope Compensation Ramp
        8. 8.2.2.8  Soft-start
        9. 8.2.2.9  Overload Timer
        10. 8.2.2.10 Output Voltage Feedback
      3. 8.2.3 Application Curves
  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 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Related Links
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

11 Device and Documentation Support

11.1 Documentation Support

11.1.1 Related Documentation

For related documentation see the following:

  • Seminar 300 Topic 2 - Apdx A - Error Amplifier and Compensation Network Design (SLUP069)
  • Seminar 1400 Topic 5 Designing Stable Control Loops (SLUP173)
  • User Guide, AN-1861 LM25037 Evaluation Board (SNVA352)

11.2 Related Links

The following table lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy.

Table 2. Related Links

PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY
LM25037 Click here Click here Click here Click here Click here
LM25037-Q1 Click here Click here Click here Click here Click here

11.3 Community Resources

The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use.

    TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers.
    Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support.

11.4 Trademarks

E2E is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

11.5 Electrostatic Discharge Caution

esds-image

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

11.6 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.