SNVU773A March   2021  – April 2022 LM25148 , LM25148-Q1 , LM25149 , LM25149-Q1 , LM5148 , LM5148-Q1 , LM5149 , LM5149-Q1

 

  1.   Trademarks
  2. 1High Density EVM Description
    1. 1.1 Typical Applications
    2. 1.2 Features and Electrical Performance
  3. 2EVM Characteristics
  4. 3Application Circuit Diagram
  5. 4EVM Photo
  6. 5Test Setup and Procedure
    1. 5.1 EVM Connections
    2. 5.2 Test Equipment
    3. 5.3 Recommended Test Setup
      1. 5.3.1 Input Connections
      2. 5.3.2 Output Connections
    4. 5.4 Test Procedure
      1. 5.4.1 Line and Load Regulation, Efficiency
  7. 6Test Data and Performance Curves
    1. 6.1 Conversion Efficiency
    2. 6.2 Operating Waveforms
      1. 6.2.1 Switching
      2. 6.2.2 Load Transient Response
      3. 6.2.3 Line Transient Response
      4. 6.2.4 Start-Up and Shutdown With ENABLE ON and OFF
      5. 6.2.5 Start-Up and Shutdown with EN Tied to VIN
    3. 6.3 Bode Plot
    4. 6.4 CISPR 25 EMI Performance
    5. 6.5 Thermal Performance
  8. 7EVM Documentation
    1. 7.1 Schematic
    2. 7.2 Bill of Materials
    3. 7.3 PCB Layout
    4. 7.4 Component Drawings
  9. 8Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
        1. 8.2.1.1 PCB Layout Resources
        2. 8.2.1.2 Thermal Design Resources
  10. 9Revision History

7.2 Bill of Materials

Table 7-1 Bill of Materials
COUNTREF DESDESCRIPTIONPART NUMBERMFR
3C1, C7, C27Capacitor, Ceramic, 0.1 μF, 50 V, X7R, 0402, AEC-Q200CGA2B3X7R1H104K050BBTDK
1C2Capacitor, Ceramic, 4700 pF, 50 V, X7R, 0402, AEC-Q200CGA6P1X7S0J476M250ACTDK
1C3Capacitor, Ceramic, 0.47 μF, 50 V, X7R, 0603CGA3E3X7R1H474K080ABTDK
2C8, C9Capacitor, Ceramic, 0.01 μF, 50 V, X7R, 0603C1608X7R1H103K080AATDK
2C10, C11Capacitor, Ceramic, 2.2 μF, 50 V, X7R, 0805UMK212BB7225KG-TTaiyo Yuden
1C12Capacitor, Aluminum, 47 µF, 50 V, 0.68 Ω, AEC-Q200EEE-FK1H470PPanasonic
2C14, C15Capacitor, Ceramic, 10 μF, 50 V, X7R, 1210, AEC-Q20012105C106K4Z2AAVX
CNA6P1X7R1H106K250AETDK
Capacitor, Ceramic, 10 μF, 50 V, X7R, 1206, AEC-Q200CGA5L1X7R1H106K160ACTDK
6C17, C18, C19, C20, C21, C22Capacitor, Ceramic, 0.01 μF, 50 V, X7R, 0402 AEC-Q200CGA2B3X7R1H103K050BBTDK
1C23Capacitor, Ceramic, 4.7 μF, 25 V, X7R, 0805,AEC-Q200CGA4J1X7R1E475K125ACTDK
1C24Capacitor, Ceramic, 0.1 µF, 10 V, X7R, 0402, AEC-Q200StdStd
1C25Capacitor, Ceramic, 4.7 μF, 10 V, X7R, 0603GRM188Z71A475ME15DMurata
1C26Capacitor, Ceramic, 0.47 μF, 50 V, X7R, 0805 AEC-Q200GCM21BR71H474KA55LMurata
4C28, C29, C30, C31Capacitor, Ceramic, 47 μF, 10 V, X7R, 1210GRM32ER71A476KE15LMurata
1C32, C33Capacitor, Ceramic, 0.1 μF, 50 V, X7R, 0603C0603C104K5RAC-TUKEMET
1C34Capacitor, Ceramic, 33 pF, 50 V, C0G/NP0, 0402, AEC-Q200GCM1555C1H330JA16DMurata
1C35Capacitor, Ceramic, 22 pF, 50 V, C0G/NP0, 0402, AEC-Q200CGA2B2NP01H220J050BATDK
1C37Capacitor, Ceramic, 2700 pF, 50 V, X7R, 0402CL05B272KB5NNNCSamsung
4H3, H4, H5, H6Standoff, Hex, 0.5"L #4-40 Nylon18K5088
4H7, H8, H9, H10Screw, Pan Head , 4-40, 3/8", NylonH544-ND
2J1, J3Terminal Block, 2 position, 5 mm, THStdStd
1J2Header, 100 mil, 10×1, Au, THPBC12SABNTSW-110-07-G-S
1L1Inductor, 0.68 μH, 9 mΩ typ, 8.2 A, 6 mm typ,744383560068Würth Electronik
1L3Inductor, 0.68 μH, 2.9 mΩ typ, 15.3 A, 3.1 mm typ, AEC-Q200XGL6030-681MEBCoilcraft
Inductor, 0.56 μH, 3.6 mΩ typ, 13 A, 4.8 mm typ, AEC-Q200744373490056Würth Electronik
Inductor, 0.68 μH, 5 mΩ typ, 15.5 A, 3 mm typ IHLP2525CZERR68M01Vishay
2Q1, Q2MOSFET, N-Channel, 40 V, 4 mΩ, AEC-Q101IAUC60N04S6L039Infineon
1R1Resistor, Chip, 6.81 Ω, 1/10W, 1%, 0603StdStd
1R2Resistor, Chip, 0.24 Ω, 1/4W, 5%, 0603StdStd
1R3Resistor, Chip, 0 Ω, 1/8W, 1%, 0805StdStd
1R4Resistor, Chip, 200 Ω, 1/16W, 1%, 0402StdStd
1R5Resistor, Chip, 49.9 kΩ, 1/8W, 1%, 0402StdStd
1R6Resistor, Chip, 3.32 Ω, 1/16W, 1%, 0402StdStd
3R7, R12, R20Resistor, Chip, 100 kΩ, 1/16W, 1%, 0402StdStd
1R8Resistor, Chip, 22.1 kΩ, 1/16W, 1%, 0402StdStd
3R9, R10, R14Resistor, Chip, 0 kΩ, 1/5W, 1%, 0603StdStd
1R11Resistor, Chip, 5 mΩ, 1W, 1%, 0508, AEC-Q200KRL2012E-M-R005-F-T5Susumu
1R13Resistor, Chip, 9.53 kΩ, 1/16W, 1%, 0402StdStd
2R16, R17Resistor, Chip, 49.9 Ω, 1/16W, 1%, 0402StdStd
1R18Resistor, Chip, 10 kΩ, 1/16W, 1%, 0402StdStd
1R19Resistor, Chip, 41.2 kΩ, 1/16W, 1%, 0402StdStd
1R22Resistor, Chip, 19.1 kΩ, 1/16 W, 1%, 0402StdStd
1R23Resistor, Chip, 24.9 kΩ, 1/16 W, 1%, 0402StdStd
4TP1, TP2, TP3, TP4Test Point, Miniature, SMT5019Keystone
1U1IC, LM25149-Q1, 42-V Synchronous Buck Controller, VQFN-24LM25149QRGYRQ1TI
1PCB1PCB, FR4, 6 layer, 2 oz, 70 mm × 40 mmPCB—