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Analog Devices ADP1108AR-12 — DC-DC Power Modules

ADP1108AR-12 Step-Up/Step-Down DC-DC Converter

MPNADP1108AR-12
End of Life

Analog Devices ADP1108AR-12, Series ADP1108, Step-Up/Step-Down DC-DC Converter, Buck-Boost Topology, Fixed 12V Output, 19 kHz Switching, 2V to 30V Input, 8-SOIC, 0°C to 70°C.

$0.49Ref. price · indicative, final on quote
Analog Devices ADP1108AR-12 datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSRoHS non-compliant
SeriesADP1108
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

ADP1108AR-12 specifications
ParameterValue
SeriesADP1108
Output typeFixed
MountingSurface Mount
Voltage - input30V
Voltage - output (Min (Fixed))12V
Frequency19kHz
I/O channels1
Operating temperature0°C ~ 70°C
PackageBulk
FunctionStep-Up/Step-Down
TopologyBuck-Boost
Case8-SOIC (0.154\", 3.90mm Width)
Output configurationPositive
Synchronous rectifierNo

Product details

Fixed 12V buck-boost, 19 kHz — what that means on the bench

The Analog Devices ADP1108AR-12 is a fixed 12V output step-up/step-down (buck-boost) DC-DC converter in an 8-SOIC package. It takes a 2V to 30V input rail and delivers a regulated positive 12V at its single output, switching at 19 kHz. That switching frequency is the first thing to flag: at 19 kHz it sits right in the audible band, so you will hear the inductor whine unless you pot the board or use a shielded inductor. The buck-boost topology means the output stays at 12V whether the input is above or below 12V — useful for battery-powered gear where the cell voltage drops below the target rail.

Sourcing and lifecycle — still active, but RoHS non-compliant

If your BOM requires full RoHS compliance for EU markets or green-label programs, this part will not pass. For military, aerospace, or industrial exempt applications where leaded solder is still allowed, it is fine.

Frequently asked questions

What is the switching frequency of the ADP1108?

The switching frequency is 19 kHz. That is in the audible range, so expect inductor whine in quiet environments.

Can I replace ADP1108AR-12 with ADP1108AR-5?

No — the ADP1108AR-5 is a fixed 5V output version, not 12V. The pinout may be the same, but the output voltage is different, so it is not a functional replacement unless your circuit can accept 5V.