SLUUD23 September   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Test Setup and Procedure
      1. 2.1.1 EVM Connections
      2. 2.1.2 Test Equipment
      3. 2.1.3 Recommended Test Setup
        1. 2.1.3.1 Input Connections
        2. 2.1.3.2 Output connections
      4. 2.1.4 Test Procedure
        1. 2.1.4.1 Line and Load Regulation, Efficiency
  8. 3Implementation Results
    1. 3.1 Performance Data and Results
      1. 3.1.1 EVM Characteristics
      2. 3.1.2 Conversion Efficiency
      3. 3.1.3 Operating Waveforms
        1. 3.1.3.1 Start-Up with EN
        2. 3.1.3.2 Start-Up with VIN
        3. 3.1.3.3 Load Transient Response
        4. 3.1.3.4 Output Voltage Ripple
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Compliance Information
    1. 5.1 Compliance and Certifications
  11. 6Additional Information
    1. 6.1 Trademarks
  12. 7Related Documentation

1.3 Specification

A summary of the LMR51603EVM performance specifications is provided in Table 1-1. Specifications are given for 12V input voltage and 5V output voltage, unless otherwise noted. The ambient temperature is 25°C for all measurement, unless otherwise noted.

Table 1-1 LMR51603EVM Performance Specifications Summary
SpecificationsTest ConditionsMINTYPMAXUnit
VINInput voltage

5.5

12

65

V
CH1Output voltage

4.9

5.0

5.1

V
Operating frequencyVIN = 12V, IOUT = 300mA, LOUT = 47µH

935

1100

1265

kHz
Output current range0

0.3

A
High-side current limitVIN = 12V, LOUT = 47µH

0.4

0.55

0.7

A

Low-side current limit

VIN = 12V, LOUT = 47µH

0.32

0.42

0.51

A

The schematic of an LMR51603-based synchronous buck converter is shown in Figure 1-1.

LMR51603EVM LMR51603 Synchronous Buck Regulator Simplified SchematicFigure 1-1 LMR51603 Synchronous Buck Regulator Simplified Schematic