SNVU935 March   2025 LM251772

 

  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 Connector, Test Point, and Selection Switch Descriptions
    1. 2.1 Connector Descriptions
    2. 2.2 Jumper Descriptions
    3. 2.3 Test Point Descriptions
  9. 3Implementation Results
    1. 3.1 Test Setup
    2. 3.2 Test Procedure
    3. 3.3 Precautions
    4. 3.4 Test Data and Performance Curves
      1. 3.4.1 Thermal Performance
      2. 3.4.2 Efficiency
      3. 3.4.3 Steady State Waveforms
      4. 3.4.4 Step Load Response
      5. 3.4.5 AC Loop Response Curves
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 Board Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1.     Trademarks

1.4 Device Information

The LM251772 is a four switch buck-boost controller. The device provides a regulated output voltage if the input voltage is higher, equal to 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 36V
  • Output voltage 3.3V to 48V
  • Peak current regulation scheme
  • Dynamic output voltage tracking
    • Digital PWM tracking input
    • Analog tracking input
    • Via I2C interface programming
  • 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