SNVSBU7 September   2020 LM34966-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Line Undervoltage Lockout (UVLO/SYNC/EN Pin)
      2. 8.3.2  High Voltage VCC Regulator (BIAS, VCC Pin)
      3. 8.3.3  Soft Start (SS Pin)
      4. 8.3.4  Switching Frequency (RT Pin)
      5. 8.3.5  Clock Synchronization (UVLO/SYNC/EN Pin)
      6. 8.3.6  Current Sense and Slope Compensation (CS Pin)
      7. 8.3.7  Current Limit and Minimum On-time (CS Pin)
      8. 8.3.8  Feedback and Error Amplifier (FB, COMP Pin)
      9. 8.3.9  Power-Good Indicator (PGOOD Pin)
      10. 8.3.10 Hiccup Mode Overload Protection
      11. 8.3.11 Maximum Duty Cycle Limit and Minimum Input Supply Voltage
      12. 8.3.12 MOSFET Driver (GATE Pin)
      13. 8.3.13 Overvoltage Protection (OVP)
      14. 8.3.14 Thermal Shutdown (TSD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Run Mode
  9. 9 Application and Implementation
    1. 9.1 Power-On Hours (POH)
    2. 9.2 Application Information
    3. 9.3 Typical Application
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
        1. 9.3.2.1 Custom Design With WEBENCH® Tools
        2. 9.3.2.2 Recommended Components
        3. 9.3.2.3 Inductor Selection (LM)
        4. 9.3.2.4 Output Capacitor (COUT)
        5. 9.3.2.5 Input Capacitor
        6. 9.3.2.6 MOSFET Selection
        7. 9.3.2.7 Diode Selection
        8. 9.3.2.8 Efficiency Estimation
      3. 9.3.3 Application Curve
    4. 9.4 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

1 Features

  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C TA
    • Maximum operating temperature 150°C TJ
  • Functional Safety-Capable
  • Suited for wide input operating range car battery applications
    • 3.5-V to 40-V operating range (45-V abs max)
    • 2.97-V to 16-V when BIAS = VCC
    • Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
    • Input transient protection up to 45 V
    • Minimized battery drain
      • Low shutdown current ( IQ ≤ 2.6 µA )
      • Low operating current ( IQ ≤ 490 µA )
  • Small solution size and low cost
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Minimized undershoot during cranking (start-stop application)
  • Higher efficiency with low-power dissipation
    • 100-mV ±7% accurate current limit threshold
    • Strong 1.0-A peak standard MOSFET driver
    • Supports external VCC supply
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable switching frequency from 100 kHz to 500 kHz
  • Integrated protection features
    • Constant peak current limiting over input voltage
    • Hiccup mode overload protection
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Programmable extra slope compensation
  • Adjustable soft start
  • PGOOD indicator
  • 14-Pin HTSSOP package (5.0 mm × 4.4 mm)
  • Create a custom design using the LM34966-Q1 with the WEBENCH® power designer