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Figure 2. Efficiency vs Load Current
Table 1. Bill of Materials X-Version
Part ID Part Value Manufacturer Part Number Package Type
C1, Input Cap 4.7µF, 10V, X5R Murata GRM42-6X5R475K10 1206
C2, Output Cap 10µF, 6.3V, X5R Murata GRM42-6X5R106K6.3 1206
C3, Boost Cap 0.01µF Vishay VJ0805Y103KXXA 0805
D2, Boost Diode 1Vf @ 50mA Diode Diodes, Inc. 1N4148W SOD-123
R2 10kΩ, 1% Vishay CRCW12061002F 1206
U1 1A Buck Regulator Texas Instruments LM2734 Thin SOT23-6
D1, Catch Diode 0.34Vf Schottky 1A, 20VR International Rectifier MBRA120 SMA
L1 2.7µH, 1.8A, 22mΩ TDK SLF6028T-2R7M1R8 6028
R1 12.4kΩ, 1% Vishay CRCW12061242F 1206
R3 0Ω Vishay CRCW12060R00F 1206
D3, C4, R4, R5 Open
Table 2. Bill of Materials Y-Version
Part ID Part Value Manufacturer Part Number Package Type
C1, Input Cap 10µF, 10V, X5R Murata GRM42-6X5R106K10 1206
C2, Output Cap 10µF, 6.3V, X5R Murata GRM42-6X5R106K6.3 1206
C3, Boost Cap 0.01µF Vishay VJ0805Y103KXXA 0805
D2, Boost Diode 1Vf @ 50mA Diode Diodes, Inc. 1N4148W SOD-123
R2 10kΩ, 1% Vishay CRCW12061002F 1206
U1 1A Buck Regulator Texas Instruments LM2734 Thin SOT23-6
D1, Catch Diode 0.34Vf Schottky 1A, 20VR International Rectifier MBRA120 SMA
L1 6.8µH, 1.5A, 35mΩ TDK SLF6028T-6R8M1R5 6028
R1 12.4kΩ, 1% Vishay CRCW12061242F 1206
R3 0Ω Vishay CRCW12060R00F 1206
D3, C4, R4, R5 Open
2
AN-1350 LM2734 Evaluation Board SNVA100A–February 2005–Revised April 2013
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