SNVA100B February   2005  – December 2021 LM2734 , LM2734-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Operating Conditions
  4. 3PCB Layout
  5. 4Additional Circuit Configuration Schematics
  6. 5Revision History

2 Operating Conditions

  • VIN = 5 V
  • VO = 1.8 V
  • IO = 1 A
GUID-D19AA910-B62A-4993-83F8-01147B92D488-low.gifFigure 2-1 LM2734 Demo Board Schematic
GUID-D04C0248-45FA-4EF4-BEC0-05D37AF27336-low.pngFigure 2-2 Efficiency vs Load Current
Table 2-1 Bill of Materials X-Version
Part ID Part Value Manufacturer Part Number Package Type
C1, Input Cap 4.7 µF, 10 V, X5R Murata GRM42-6X5R475K10 1206
C2, Output Cap 10 µF, 6.3 V, X5R Murata GRM42-6X5R106K6.3 1206
C3, Boost Cap 0.01 µF Vishay VJ0805Y103KXXA 0805
D2, Boost Diode 1 Vf at 50-mA Diode Diodes, Inc. 1N4148W SOD-123
R2 10 kΩ, 1% Vishay CRCW12061002F 1206
U1 1-A Buck Regulator Texas Instruments LM2734 Thin SOT23-6
D1, Catch Diode 0.34-Vf Schottky, 1 A, 20VR International Rectifier MBRA120 SMA
L1 2.7 µH, 1.8 A, 22 mΩ TDK SLF6028T-2R7M1R8 6028
R1 12.4 kΩ, 1% Vishay CRCW12061242F 1206
R3 0 Ω Vishay CRCW12060R00F 1206
D3, C4, R4, R5 Open
Table 2-2 Bill of Materials Y-Version
Part ID Part Value Manufacturer Part Number Package Type
C1, Input Cap 10 µF, 10 V, X5R Murata GRM42-6X5R106K10 1206
C2, Output Cap 10 µF, 6.3 V, X5R Murata GRM42-6X5R106K6.3 1206
C3, Boost Cap 0.01 µF Vishay VJ0805Y103KXXA 0805
D2, Boost Diode 1 Vf at 50-mA Diode Diodes, Inc. 1N4148W SOD-123
R2 10 kΩ, 1% Vishay CRCW12061002F 1206
U1 1-A Buck Regulator Texas Instruments LM2734 Thin SOT23-6
D1, Catch Diode 0.34-Vf Schottky, 1 A, 20VR International Rectifier MBRA120 SMA
L1 6.8 µH, 1.5 A, 35 mΩ TDK SLF6028T-6R8M1R5 6028
R1 12.4 kΩ, 1% Vishay CRCW12061242F 1206
R3 0 Ω Vishay CRCW12060R00F 1206
D3, C4, R4, R5 Open