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Analog Devices LTC3561AIDD#PBF — Discrete Semiconductors

LTC3561AIDD#PBF Buck Converter, 1A, 2.5MHz, Active

MPNLTC3561AIDD#PBF
End of Life

Analog Devices LTC3561AIDD#PBF step-down buck regulator, 1A output, 2.5MHz switching, adjustable 0.8V to 5V, synchronous rectification, 8-DFN (3x3) exposed pad, -40°C to 125°C.

$6.83Ref. price · indicative, final on quote
Analog Devices LTC3561AIDD#PBF datasheet (PDF)
Packaging8-WFDFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LTC3561AIDD#PBF specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input5.5V
Voltage - output5V
Voltage - output (Min (Fixed))0.8V
Output current1A
Frequency - switching2.5MHz
I/O channels1
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
FunctionStep-Down
TopologyBuck
Case8-WFDFN Exposed Pad
Output configurationPositive
Synchronous rectifierYes

Product details

1A synchronous buck for tight 2.5V–5.5V rails

The LTC3561AIDD#PBF: Its 2.5MHz switching frequency lets you use small inductors and ceramic capacitors, shrinking the total solution footprint on a single-layer or multi-layer board.

Package and thermal design for the 8-DFN

The part comes in an 8-lead WFDFN with exposed pad (3mm x 3mm body, supplier device package 8-DFN). The junction-to-ambient thermal resistance depends heavily on the PCB copper area; a 4-layer board with 1 oz copper on the inner planes keeps the die temperature within limits at full 1A load.

Frequently asked questions

How do I get current pricing and availability for LTC3561AIDD#PBF?

Submit an RFQ through this listing. No stock-holding claim is made here — we quote to order.

What is the closest functional second-source to LTC3561AIDD#PBF?

The LT3505IDD#PBF is a similar 1.2A buck regulator in the same 8-DFN package, but it lacks synchronous rectification (external diode required) and switches at 3MHz. The LT8620IMSE#PBF offers 2A output with synchronous rectification but comes in a different MSOP-16 package. Neither is a drop-in replacement — verify pinout and external component values before substituting.

Will LTC3561AIDD#PBF drop into a panel that was specified around LT8631HFE#PBF without rewiring?

No. The LT8631HFE#PBF is in a different package (16-lead TSSOP exposed pad) and has a different pinout. The LTC3561AIDD#PBF requires its own PCB layout — a board spin is necessary for direct replacement.