SNVU948 July   2025 LM51770

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Connector, Test Point, and Selection Switch Descriptions
      1. 2.1.1 Connector Descriptions
      2. 2.1.2 Jumper Descriptions
      3. 2.1.3 Test Point Descriptions
      4. 2.1.4 Selection Switch Descriptions
        1. 2.1.4.1 S1 and S2 CFG Setting
      5. 2.1.5 Current Monitor and Current Limiter Configuration
        1. 2.1.5.1 Current Monitor Configuration
        2. 2.1.5.2 Current Limiter Configuration
  9. 3Implementation Results
    1. 3.1 Test Setup and Procedure
      1. 3.1.1 Test Setup
      2. 3.1.2 Test Procedure
      3. 3.1.3 Precautions
    2. 3.2 Test Data and Performance Curves
      1. 3.2.1 Thermal Performance
      2. 3.2.2 Efficiency
      3. 3.2.3 Steady State Waveforms
      4. 3.2.4 Step Load Response
      5. 3.2.5 AC Loop Response Curve
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

Device Information

The LM51770 is a four switch Buck-Boost controller. The device provides a regulated output voltage if the input voltage is higher, equal or lower as the adjusted output voltage. In power safe mode, the device supports a superb efficiency over the full range of the output.

  • Wide input range from 3.5V to 78V (EVM max. 48V)
  • Output voltage 3.3V to 78V (EVM max. 48V)
  • Peak current regulation scheme
  • Dynamic output voltage tracking
    • Digital PWM tracking input
    • Analog tracking input
  • Minimum quiescent current
    • Low shut down Iq of 3μA
    • Low operating Iq of 25μA
  • Operation mode selection for high light load efficiency
    • Power save burst mode
    • μSleep power save mode
  • Integrated high voltage supply LDO