Buck or LDO: Choosing a Power Topology
Two numbers decide it: voltage difference times current. Below 1 W an LDO is simpler and quieter; above it the heat has nowhere to go.
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ROHM Semiconductor components
Review searchable product records associated with ROHM Semiconductor, then confirm the exact MPN, sourcing path and commercial conditions through quotation. Manufacturer naming is a catalog field and does not state an authorized distribution relationship.
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Price, MOQ, lead time and shipping terms are finalized in the quote.
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1SR154-400TE251SR154-400TE25 - ROHM, SMA(DO-214AC)
ROHM Semiconductor ROHMSMA(DO-214AC)In Stock 7500 units available£1.00 GBP Final price in quote -
1SS355VMTE-171SS355VMTE-17 - ROHM, SOD-323F
ROHM Semiconductor ROHMSOD-323FIn Stock 3398810 units available£1.00 GBP Final price in quote -
1SS380VMTE-171SS380VMTE-17 - ROHM, SOD-323FL
ROHM Semiconductor ROHMSOD-323FLIn Stock 20638 units available£1.00 GBP Final price in quote -
1SS390TE611SS390TE61 - ROHM, SOD-523
ROHM Semiconductor ROHMSOD-523In Stock 18000 units available£1.00 GBP Final price in quote -
1SS400CST2RA1SS400CST2RA - ROHM, VMN2
ROHM Semiconductor ROHMVMN2In Stock 8000 units available£1.00 GBP Final price in quote -
1SS400SMFHT2R1SS400SMFHT2R - ROHM, SOD-523
ROHM Semiconductor ROHMSOD-523In Stock 7895 units available£1.00 GBP Final price in quote -
1SS400SMT2R1SS400SMT2R - ROHM, SOD-523
ROHM Semiconductor ROHMSOD-523In Stock 79934 units available£1.00 GBP Final price in quote -
2SA1036KT146R2SA1036KT146R - ROHM, TO-236-3(SOT-23-3)
ROHM Semiconductor ROHMTO-236-3(SOT-23-3)In Stock 40988 units available£1.00 GBP Final price in quote -
2SA1037AKT146R2SA1037AKT146R - ROHM, TO-236-3(SOT-23-3)
ROHM Semiconductor ROHMTO-236-3(SOT-23-3)In Stock 72075 units available£1.00 GBP Final price in quote -
2SA1576AT106R2SA1576AT106R - ROHM, SC-70(SOT-323)
ROHM Semiconductor ROHMSC-70(SOT-323)In Stock 8551 units available£1.00 GBP Final price in quote -
2SA1576UBTLR2SA1576UBTLR - ROHM, UMT3F
ROHM Semiconductor ROHMUMT3FIn Stock 13993 units available£1.00 GBP Final price in quote -
2SA1774EBTLR2SA1774EBTLR - ROHM, EMT3F(SOT-416FL)
ROHM Semiconductor ROHMEMT3F(SOT-416FL)In Stock 12000 units available£1.00 GBP Final price in quote -
2SA2029T2LQ2SA2029T2LQ - ROHM, SOT-723
ROHM Semiconductor ROHMSOT-723In Stock 15990 units available£1.00 GBP Final price in quote -
2SA2030T2L2SA2030T2L - ROHM, SOT-723
ROHM Semiconductor ROHMSOT-723In Stock 8013 units available£1.00 GBP Final price in quote -
2SAR523EBTL2SAR523EBTL - ROHM, SOT-416
ROHM Semiconductor ROHMSOT-416In Stock 24149 units available£1.00 GBP Final price in quote -
2SAR543RTL2SAR543RTL - ROHM, SC-96
ROHM Semiconductor ROHMSC-96In Stock 12001 units available£1.00 GBP Final price in quote -
2SAR553P5T1002SAR553P5T100 - ROHM, SOT-89
ROHM Semiconductor ROHMSOT-89In Stock 11562 units available£1.00 GBP Final price in quote -
2SB1197KT146R2SB1197KT146R - ROHM, SC-59-3
ROHM Semiconductor ROHMSC-59-3In Stock 240403 units available£1.00 GBP Final price in quote -
2SB1198KT146R2SB1198KT146R - ROHM, TO-236-3(SOT-23-3)
ROHM Semiconductor ROHMTO-236-3(SOT-23-3)In Stock 96953 units available£1.00 GBP Final price in quote -
2SC2411KT146Q2SC2411KT146Q - ROHM, TO-236-3(SOT-23-3)
ROHM Semiconductor ROHMTO-236-3(SOT-23-3)In Stock 9785 units available£1.00 GBP Final price in quote -
2SC2412KT146R2SC2412KT146R - ROHM, SOT-346/SC-59
ROHM Semiconductor ROHMSOT-346/SC-59In Stock 638100 units available£1.00 GBP Final price in quote -
2SC4061KT146N2SC4061KT146N - ROHM, SC-59-3
ROHM Semiconductor ROHMSC-59-3In Stock 24001 units available£1.00 GBP Final price in quote -
2SC4081T106R2SC4081T106R - ROHM, SC-70(SOT-323)
ROHM Semiconductor ROHMSC-70(SOT-323)In Stock 8645 units available£1.00 GBP Final price in quote -
2SC4081U3T106R2SC4081U3T106R - ROHM, UMT-3
ROHM Semiconductor ROHMUMT-3In Stock 6000 units available£1.00 GBP Final price in quote
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A searchable catalog is not an inventory promise.
Product records help identify a manufacturer part number and technical family. A listed part may be fulfilled from Chip-seek warehouse-held stock or a reviewed sourcing channel. Source, quantity, packaging, date code, MOQ, price and lead time are confirmed before an order is accepted.
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Recent Articles
Market signals, technical notes, and practical sourcing guidance for semiconductor procurement.
TVS Selection: Standoff, Clamp, Current, Capacitance
A TVS is chosen by four numbers in a specific order. Standoff above the rail, clamp below the IC limit, enough peak current, and capacitance that...
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EEPROM vs Flash: Endurance, Granularity, Write Time
Both keep data without power. Byte writes versus sector erase, 1M versus 100k cycles, and the workload that decides which one belongs in the design.
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Gate Resistor and Switching Loss: One Part, Two Effects
Small Rg means fast edges and ringing; large Rg means clean edges and heat. The split diode path, starting values, and how to measure the loss.
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Crystal or Oscillator: Choosing the Clock Source
A crystal needs a circuit; an oscillator is a part. Accuracy classes, startup, jitter, what changes on the board, and when a resonator is enough.
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Decoupling Capacitor Selection: Bias, SRF, Distance
A 10 uF capacitor is not 10 uF at voltage, and above self-resonance it is an inductor. Dielectric, DC bias, SRF and the millimetres that matter.
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HDMI and DisplayPort: A Practical Introduction
Before pixels, the source needs HPD and EDID. Lanes, AC coupling, DDC/AUX and the sideband failures behind most no-signal reports.
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MOSFET Selection: VDS, RDS(on), Qg, and Thermal
Most MOSFET choices fail on the second or third number. Voltage margin, on-resistance at your real gate drive, gate charge, and the package thermal path.
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