SLVUCF0A june   2022  – may 2023

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Background
  5. 2Quick Start
  6. 3EVM Connections
  7. 4Schematic
  8. 5PCB Layout
  9. 6Test Data and Performance Curves
    1. 6.1 Efficiency and Load Regulation Performance
    2. 6.2 Waveforms
    3. 6.3 Thermal Performance
    4. 6.4 EMI Performance
  10. 7Bill of Materials
  11. 8Custom Design With WEBENCH® Tools
  12. 9Revision History

3 EVM Connections

Reference the EVM connections described in Table 3-1 to evaluate the LMR54450-Q1. While working at an ESD-protected workstation, ensure that any wrist straps, bootstraps, or mats are connected and referencing the user to earth ground before power is applied to the EVM.

GUID-20230502-SS0I-KFSH-WLSQ-8XXVNLXQNWWF-low.svg Figure 3-1 EVM Test Setup
Table 3-1 EVM Power Connections
LabelDescription
VIN_EMI Positive input power connection on terminal J1.
GNDNegative input power connection on terminal J1.
VOUTPositive output power connection on terminal J3.
GNDNegative output power connection on terminal J3.
Table 3-2 EVM Signal Connections
Label Description
VIN (TP1) Positive input sense terminal. Connect the multimeter positive lead for measuring efficiency.
GND (TP3) Negative input sense terminal. Connect the multimeter negative lead for measuring efficiency.
VOUT (TP2) Positive output sense terminal. Connect a multimeter positive lead for measuring efficiency and line and load regulation.
GND (TP4) Negative output sense terminal. Connect the multimeter negative lead for measuring efficiency and line and load regulation.
GND Ground reference point
EN Precision enable input and input voltage UVLO protection. Place a shunt from EN to GND to pull down the pin and turn OFF. Float EN select for default ON enable.
PG Power-good monitor output. This is an open-drain flag with a 110-kΩ pullup resistor to VOUT.
BODE Bode plot measurement and signal injection. A 20-Ω resistor from BODE to VOUT facilitates oscillator signal injection for bode plot measurement. Apply a swept-frequency signal between BODE and VOUT while measuring the respective response at each terminal for loop gain measurement.