TIDT324 February   2023

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Dimensions
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transient
    4. 3.4 Start-Up

Description

This reference design utilizes the LM61495 synchronous buck regulator, with internal top and bottom FETs, which is configured as a synchronous inverting buck-boost converter. The design generates an output of –8 V, capable of delivering 2.7-A continuous (4-A peak) of current to the load, from a +12 V, ±10% input. The design is built on the PMP23241A PCB, which is a 4-layer board with 1-oz copper for each of the four layers. The board is 76.2 mm × 68.6 mm. The actual design size is approximately 17.0 mm × 30.5 mm, excluding the input bulk capacitor, C1.