SNVS509F April   2007  – November 2023 LM25116

PRODUCTION DATA  

  1.   1
  2. Features
  3. Applications
  4. Description
  5. Pin Configuration and Functions
  6. Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Typical Characteristics
  7. Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 High-Voltage Start-Up Regulator
      2. 6.3.2 Enable
      3. 6.3.3 UVLO
      4. 6.3.4 Oscillator and Sync Capability
      5. 6.3.5 Error Amplifier and PWM Comparator
      6. 6.3.6 Ramp Generator
      7. 6.3.7 Current Limit
      8. 6.3.8 HO Output
      9. 6.3.9 Thermal Protection
    4. 6.4 Device Functional Modes
      1. 6.4.1 Soft Start and Diode Emulation
  8. Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1  Timing Resistor
        2. 7.2.2.2  Output Inductor
        3. 7.2.2.3  Current Sense Resistor
        4. 7.2.2.4  Ramp Capacitor
        5. 7.2.2.5  Output Capacitors
        6. 7.2.2.6  Input Capacitors
        7. 7.2.2.7  VCC Capacitor
        8. 7.2.2.8  Bootstrap Capacitor
        9. 7.2.2.9  Soft Start Capacitor
        10. 7.2.2.10 Output Voltage Divider
        11. 7.2.2.11 UVLO Divider
        12. 7.2.2.12 MOSFETs
        13. 7.2.2.13 MOSFET Snubber
        14. 7.2.2.14 Error Amplifier Compensation
        15. 7.2.2.15 Comprehensive Equations
          1. 7.2.2.15.1 Current Sense Resistor and Ramp Capacitor
          2. 7.2.2.15.2 Modulator Transfer Function
          3. 7.2.2.15.3 Error Amplifier Transfer Function
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

Typical Characteristics

GUID-7E360C95-805B-49AB-9E5E-149563B2E154-low.pngFigure 5-1 Typical Application Circuit Efficiency
GUID-57D3F6F7-BCD5-41CB-B93D-32E98FDB475E-low.pngFigure 5-3 Driver Dead-time vs Temperature
GUID-4194190D-AA55-4740-A10F-D3B1627E96FD-low.pngFigure 5-5 Driver Sink Current vs VCC
GUID-F4009E5E-F1C0-463A-9824-8F52FFD5B334-low.pngFigure 5-7 LO High RDS(ON) vs VCC
GUID-5D21880F-0539-4AE6-83B4-047668DC7891-low.pngFigure 5-9 LO Low RDS(ON) vs VCC
GUID-351653BA-E72D-4B66-B54D-958DFEF1B82F-low.pngFigure 5-11 Forced HO Off-time vs Temperature VCCX = 5 V
GUID-F9B29019-AC9F-45FB-A941-B9A35D272254-low.pngFigure 5-13 Frequency vs RT
GUID-8ADB9701-437E-4DC5-AEB4-F317144DAC95-low.pngFigure 5-15 Frequency vs Temperature
GUID-F8B55EE6-DB35-4643-9B49-C9F525EC460B-low.pngFigure 5-17 Frequency vs Temperature
GUID-A9F9E568-A2D2-46E0-BF4C-D3D3417B53C0-low.pngFigure 5-19 VIN Operating Current vs Temperature
GUID-625FC0F1-145F-438C-9757-90701DCF7D28-low.pngFigure 5-21 VCC UVLO vs Temperature
GUID-028AF71F-9771-4485-9FC0-CBD8E6568D59-low.pngFigure 5-23 VCC vs ICC
GUID-B885406B-B53F-495B-ABA5-7151FDE4F2D0-low.pngFigure 5-2 Driver Source Current vs VCC
GUID-C4F1C121-2462-4944-A1CE-5BF4F029FBB5-low.pngFigure 5-4 HO High RDS(ON) vs VCC
GUID-CD880B3B-B913-4B50-9911-163C792412C9-low.pngFigure 5-6 HO Low RDS(ON) vs VCC
GUID-B024E5D0-4188-43FF-B20E-C531584594B8-low.pngFigure 5-8 EN Input Threshold vs Temperature
GUID-9903E9A4-F1AB-45BA-B4E3-14AB235E9A1E-low.pngFigure 5-10 HB to SW UVLO vs Temperature
GUID-655CB703-C461-4B83-B554-A194A4DABD08-low.pngFigure 5-12 HB DC Bias Current vs Temperature
GUID-859E26F6-00B8-4B90-BF06-853A659E80C8-low.pngFigure 5-14 Error Amp Gain vs Frequency
GUID-0BE3FE5E-64EB-4638-A1E2-3F530CC67868-low.pngFigure 5-16 Error Amp Phase vs Frequency
GUID-53BF55A4-F747-42A9-BDF1-C34DF33975DC-low.pngFigure 5-18 Current Limit Threshold vs Temperature
GUID-02AAFEDC-E0E7-47AB-8136-3352F3EECEC5-low.pngFigure 5-20 VCC vs Temperature
GUID-DA7D006A-8BA9-46B0-B73F-6222A9309D49-low.pngFigure 5-22 VCC vs VIN
GUID-C18D8500-26A1-4122-804A-34E6F0325BF5-low.pngFigure 5-24 VCCX Switch RDS(ON) vs VCCX