SNVSCF4 July   2025 LM25139-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1. 4.1 Wettable Flanks
  6. 5 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 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Input Voltage Range (VIN )
      2. 6.3.2  High-Voltage Bias Supply Regulator (VCC)
      3. 6.3.3  Precision Enable (EN)
      4. 6.3.4  Power-Good Monitor (PG)
      5. 6.3.5  Switching Frequency (RT)
      6. 6.3.6  Dual Random Spread Spectrum (DRSS)
      7. 6.3.7  Soft Start
      8. 6.3.8  Output Voltage Setpoint (FB)
      9. 6.3.9  Minimum Controllable On Time
      10. 6.3.10 Error Amplifier and PWM Comparator (FB)
      11. 6.3.11 Slope Compensation
      12. 6.3.12 Inductor Current Sense (ISNS, VOUT)
        1. 6.3.12.1 Shunt Current Sensing
        2. 6.3.12.2 Inductor DCR Current Sensing
        3. 6.3.12.3 Hiccup-Mode Current Limiting
    4. 6.4 Device Functional Modes
      1. 6.4.1 Sleep Mode
      2. 6.4.2 Forced PWM and Synchronization (FPWM/SYNC)
      3. 6.4.3 Thermal Shutdown
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Power Train Components
        1. 7.1.1.1 Buck Inductor
        2. 7.1.1.2 Output Capacitors
        3. 7.1.1.3 Input Capacitors
        4. 7.1.1.4 Power MOSFETs
        5. 7.1.1.5 EMI Filter
      2. 7.1.2 Error Amplifier and Compensation
    2. 7.2 Typical Applications
      1. 7.2.1 Design 1 – High Efficiency 2.2MHz Synchronous Buck Regulator
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 7.2.1.2.2 Buck Inductor
          3. 7.2.1.2.3 Current-Sense Components
          4. 7.2.1.2.4 Output Capacitors
          5. 7.2.1.2.5 Input Capacitors
          6. 7.2.1.2.6 Frequency Set Resistor
          7. 7.2.1.2.7 Feedback Resistors
          8. 7.2.1.2.8 Compensation Components
        3. 7.2.1.3 Application Curves
      2. 7.2.2 Design 2 – High-Efficiency, 440kHz, Synchronous Buck Regulator
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Power Stage Layout
        2. 7.4.1.2 Gate Drive Layout
        3. 7.4.1.3 PWM Controller Layout
        4. 7.4.1.4 Thermal Design and Layout
        5. 7.4.1.5 Ground Plane Design
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Custom Design With WEBENCH® Tools
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
        1. 8.2.1.1 Low-EMI Design Resources
        2. 8.2.1.2 Thermal Design Resources
        3. 8.2.1.3 PCB Layout Resources
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

8.1.1 Development Support

With an input operating voltage as low as 3.5V and up to 100V as specified in Table 8-1, the LM(2)514x/-Q1 family of synchronous buck controllers from TI provides flexibility, scalability and optimized design size for a range of applications. These controllers enable DC/DC designs with high density, low EMI and increased flexibility. Available EMI mitigation features include dual-random spread spectrum (DRSS) or triangular spread spectrum (TRSS), split gate driver outputs for slew rate (SR) control, and integrated active EMI filtering (AEF). All controllers are rated for a maximum operating junction temperature of 150°C and have AEC-Q100 grade 1 qualification.

Table 8-1 Automotive Synchronous Buck DC/DC Controller Family
DC/DC CONTROLLER SINGLE or DUAL VIN RANGE CONTROL METHOD GATE DRIVE VOLTAGE SYNC OUTPUT KEY FEATURE
LM5137-Q1 Dual 4V to 80V Peak current mode 5V 90° phase shift 100% duty cycle
LM5137F-Q1 Dual 4V to 80V Peak current mode 5V 90° phase shift ASIL B or D
LM25137-Q1 Dual 4V to 42V Peak current mode 5V 90° phase shift 100% duty cycle
LM25137F-Q1 Dual 4V to 42V Peak current mode 5V 90° phase shift ASIL B or D
LM5141-Q1 Single 3.8V to 65V Peak current mode 5V N/A Split gate drive
LM25141-Q1 Single 3.8V to 42V Peak current mode 5V N/A Split gate drive
LM5143A-Q1 Dual 3.5V to 65V Peak current mode 5V 90° phase shift Split gate drive
LM25143-Q1 Dual 3.5V to 42V Peak current mode 5V 90° phase shift Split gate drive
LM5145-Q1 Single 5.5V to 75V Voltage mode 7.5V 180° phase shift No shunt
LM5146-Q1 Single 5.5V to 100V Voltage mode 7.5V 180° phase shift 100V input capability
LM5148-Q1 Single 3.5V to 80V Peak current mode 5V 180° phase shift DRSS
LM25148-Q1 Single 3.5V to 42V Peak current mode 5V 180° phase shift DRSS
LM5149-Q1 Single 3.5V to 80V Peak current mode 5V 180° phase shift AEF
LM25149-Q1 Single 3.5V to 42V Peak current mode 5V 180° phase shift AEF
LM5190-Q1 Single 5V to 80V Peak current mode 7.5V N/A CC/CV
LM25190-Q1 Single 5V to 42V Peak current mode 7.5V N/A CC/CV

For development support, see the following: