SNVU697 September   2020 LMQ62440-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 LMQ62440-Q1 Synchronous Step-Down Voltage Converter
  3. 2Quick Start
  4. 3Detailed Descriptions
  5. 4EVM Performance
    1. 4.1 Board Efficiency, Load Regulation, Transient, and Steady-state Curves
    2. 4.2 EMI Test Results
    3. 4.3 Thermal Picture
  6. 5EVM Schematic Entry
  7. 6Bill of Materials
  8. 7Board Layout

2 Quick Start

  1. Connect the input voltage supply between the VIN and GND connectors or between VIN_EMI and GND_EMI to include the on-board input filter in the input path. Use short and thick gauge wires to minimize inductance and I-R drop. Note that current-limited sense points for VIN (VINS) and VOUT (VOUTS) are provided. Do not connect input voltage supply to VINS, as series current-limiting resistor has low power rating.
  2. Connect the load of the converter between VOUT and GND connectors using short and thick wires. Do not connect load to VOUTS, as series current-limiting resistor has low power rating.
  3. Set the supply voltage between 3 V to 36 V. Account for dropout of converter by setting supply to approximately 6 V to have 5 V output, as an example.
  4. Set the current limit of the supply to an appropriate level to supply needed current and protection.
  5. Turn on the power supply. With the default configuration, the EVM powers up and provides VOUT = 5 V.
  6. Monitor the output voltage. The maximum (DC) load current is 4 A with the LMQ62440-Q1.

See Figure 2-1 for the location of the connectors.

GUID-20200828-CA0I-X8GG-WF2N-P7CPNL4RHX3T-low.png Figure 2-1 Top Component View of LMQ62440EVM-PP-2MHz