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Analog Devices LTC3251EMSE-1.2#PBF — Discrete Semiconductors

LTC3251EMSE-1.2#PBF Charge Pump Step-Down, 1.2V Fixed Output

MPNLTC3251EMSE-1.2#PBF
End of Life

Analog Devices LTC3251EMSE-1.2#PBF, Charge Pump Step-Down Regulator, Fixed 1.2 V Output, 500 mA, 2.7 V to 5.5 V Input, 1 MHz to 1.6 MHz Switching, -40°C to 85°C, 10-MSOP-EP, Tube.

$6.32Ref. price · indicative, final on quote
Analog Devices LTC3251EMSE-1.2#PBF datasheet (PDF)
Packaging10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LTC3251EMSE-1.2#PBF specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input5.5V
Voltage - output (Min (Fixed))1.2V
Output current500mA
Frequency - switching1MHz ~ 1.6MHz
I/O channels1
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionStep-Down
TopologyCharge Pump
Case10-TFSOP, 10-MSOP (0.118\", 3.00mm Width) Exposed Pad
Output configurationPositive
Synchronous rectifierNo

Product details

The LTC3251EMSE-1.2#PBF from Analog Devices is a charge-pump step-down regulator that delivers a fixed 1.2 V output at up to 500 mA.

The 500 mA output current sets the load budget: this part supplies a 1.2 V core rail for a small MCU, an FPGA bank, or a sensor interface, but not a multi-amp processor core.

The 0.118-inch body width (3.00 mm) fits tight layouts, but the pad footprint needs clearance from adjacent traces. Supplied in Tube — not Tape & Reel — so plan for hand-loading or a tube feeder if the pick-and-place line is set up for reels only.

Frequently asked questions

Where can I buy LTC3251EMSE-1.2#PBF?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing.

Can LTC3251EMSE-1.2#PBF generate negative voltages?

No. This part is configured as a positive step-down (buck) charge pump with a fixed 1.2 V positive output. It cannot generate a negative rail.

What is a replacement for LTC3251EMSE-1.2#PBF?

No official replacement or second-source part is listed in the cross-reference data. For a functional equivalent, consider a different charge-pump step-down regulator with a fixed 1.2 V output and 500 mA capability, but verify pinout and package compatibility — the 10-MSOP-EP footprint is specific.

What is LTC3251EMSE-1.2#PBF's listed package?

The part ships in Tube packaging. The device package is a 10-MSOP-EP (10-lead MSOP with exposed pad, 0.118-inch / 3.00 mm body width).