SNVU907A July   2024  – August 2024 LM5137-Q1 , LM5137F-Q1

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
      1. 1.3.1 Application Circuit Diagrams
    4. 1.4 Device Information
  8. 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
  9. 3Implementation Results
    1. 3.1 Test Data and Performance Curves
      1. 3.1.1 Efficiency
      2. 3.1.2 Operating Waveforms
        1. 3.1.2.1 Load Transient Response
        2. 3.1.2.2 Startup/Shutdown With VIN
        3. 3.1.2.3 Startup/Shutdown With ENABLE ON and OFF
        4. 3.1.2.4 Switching
      3. 3.1.3 Thermal Performance
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
      1. 4.2.1 Component Drawings
      2. 4.2.2 Layout Guidelines
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks
  12. 6Device and Documentation Support
    1. 6.1 Device Support
      1. 6.1.1 Development Support
    2. 6.2 Documentation Support
      1. 6.2.1 Related Documentation
        1. 6.2.1.1 PCB Layout Resources
        2. 6.2.1.2 Thermal Design Resources
  13. 7Revision History

1.3 Specifications

Table 1-1 lists the EVM specifications. Unless otherwise indicated, VIN = 13.5V, which is a typical automotive battery voltage.

Table 1-1 Electrical Performance Characteristics
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT CHARACTERISTICS
Input voltage, VIN Operating range 6.5 13.5 36 V
Input UVLO turn-on threshold, VIN-ON RUV1 = 200kΩ, RUV2 = 36.5kΩ 6.5 V
Input UVLO turn-off threshold, VIN-OFF 4.5 V
Input supply current, no load, FPWM,
IIN-NL(FPWM)		 IOUT1 = IOUT2 = 0A, PFM tied to GND VIN = 8V 57 mA
VIN = 13.5V 70
VIN = 24V 66
VIN = 36V 56
Input supply current, no load, PFM,
IIN-NL(PFM)		 IOUT1 = 0A, VEN2 = 0V, PFM tied to VCC VIN = 8V 10 µA
VIN = 13.5V 10
VIN = 24V 10
VIN = 36V 10
Input supply current in shutdown, IIN-SHDN VEN1 = VEN2 = 0V 4 µA
OUTPUT CHARACTERISTICS
Output voltage, VOUT1(1) FB1 tied to VDDA with 24.9kΩ 4.95 5.0 5.05 V
Output voltage, VOUT2(1) FB2 tied to VDDA with 7.5kΩ 3.27 3.3 3.33
Output currents, IOUT1, IOUT2 VIN = 6.5V to 36V, airflow = 100LFM 0 20 A
Output voltage regulation in FPWM, ΔVOUT1, ΔVOUT2 Load regulation IOUT1, IOUT2 = 0A to 20A 1 mV
Line regulation VIN = 6.5V to 36V 1
Output voltage ripple, VOUT1-AC, VOUT2-AC IOUT1 = IOUT2 = 20A 10 mVRMS
Output overcurrent protection, IOUT1-OCP, IOUT2-OCP RS1 = RS2 = 2mΩ 26 A
Soft-start time, tSS RSS = 20kΩ 4.5 ms
Hiccup time, tRES 16384 clock cycles 37 ms
SYSTEM CHARACTERISTICS
Switching frequency, FSW RT = 52.4kΩ 440 kHz
Half-load efficiency, ηHALF(1) IOUT1 = IOUT2 = 10A VIN = 8V 96.5%
VIN = 13.5V 96%
VIN = 18V 95.5%
VIN = 24V 94.5%
Full-load efficiency, ηFULL IOUT1 = IOUT2 = 20A VIN = 8V 94%
VIN = 13.5V 94%
VIN = 18V 93.5%
VIN = 24V 93%
LM25137-Q1 junction temperature, TJ –40 150 °C
(1) The default output voltages of this EVM are 5V and 3.3V. Efficiency and other performance metrics can change based on the operating input voltage, load currents, externally-connected output capacitors and other parameters.