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Analog Devices LTC3621EMS8E-3.3#PBF — Discrete Semiconductors

LTC3621EMS8E-3.3#PBF Buck Regulator, 3.3V Fixed, 1A

MPNLTC3621EMS8E-3.3#PBF
End of Life

Analog Devices LTC3621EMS8E-3.3#PBF step-down buck regulator, 3.3V fixed output, 1A, 1MHz switching, synchronous rectification, 8-MSOP-EP exposed pad, surface mount, tube.

$7.74Ref. price · indicative, final on quote
Analog Devices LTC3621EMS8E-3.3#PBF datasheet (PDF)
Packaging8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LTC3621EMS8E-3.3#PBF specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input2.7V
Voltage - output (Min (Fixed))3.3V
Output current1A
Frequency - switching1MHz
I/O channels1
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
FunctionStep-Down
TopologyBuck
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width) Exposed Pad
Output configurationPositive
Synchronous rectifierYes

Product details

3.3V fixed-output buck at 1A — the board-level decision

The LTC3621EMS8E-3.3#PBF: It integrates a synchronous rectifier, which means the low-side FET is on-die rather than an external Schottky — the efficiency gain is real at 1 A output, and the BOM count drops by one diode.

Input voltage range and switching frequency — what they mean for the rail

At 17 V max input, the part handles 12 V rails with healthy margin — a 12 V nominal bus that spikes to 16 V during a hot-swap event stays within the abs-max envelope.