SNVU191B October   2012  – December 2021 LMR12020

 

  1.   Trademarks
  2. 1Introduction
  3. 2Features
  4. 3Evaluation Module Schematic
  5. 4Powering and Loading Considerations
    1. 4.1 Quick Start Procedure
    2. 4.2 Starting Up
    3. 4.3 Synchronization
    4. 4.4 No Load Start-Up at High Output Voltage
    5. 4.5 Adjusting the Output Voltage
    6. 4.6 Typical Test Setup
  6. 5Board Images
  7. 6Performance Characteristics
  8. 7Bill of Materials
  9. 8PCB Layout
  10. 9Revision History

4.1 Quick Start Procedure

Step 1: Set the bench power supply current limit to 2 A. Set the power supply voltage to 12 V. Turn off the power supply output. Connect the power supply to the LMR12020 demo board. Positive connection to VIN and negative connection to GND

Step 2: Connect a load, as high as 2 A, to the VOUT terminal. Positive connection to VOUT and negative connection to GND

Step 3: Turn on the bench power supply with no load applied to the LMR12020 and the shunt for the jumper J1 in place. The VOUT would be in regulation at a nominal 3.3-V output. With the shunt out, a minimum load of 10 mA would be required to have the VOUT in regulation at 5 V.

Step 4: Gradually increase the load and VOUT should remain in regulation as the load is increased up to 2 Amps. The VOUT should also be regulated when the input is swept from the minimum input to 20 V.