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Analog Devices MAX1774EEI+ — DC-DC Power Modules

MAX1774EEI+ Dual Buck Regulator, 1.5A/2A, 28-QSOP

MPNMAX1774EEI+
End of Life

Maxim Integrated MAX1774EEI+, dual step-down (buck) switching regulator, adjustable output, 1.5A and 2A per channel, 1.25MHz switching frequency, 28-QSOP package, -40°C to +85°C operating temperature.

$10.14Ref. price · indicative, final on quote
Packaging28-SSOP (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX1774EEI+ specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input2.7V
Voltage - output5V, 5.5V
Voltage - output (Min (Fixed))1V, 1.25V
Output current1.5A, 2A
Frequency1.25MHz
I/O channels2
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionStep-Down
TopologyBuck
Case28-SSOP (0.154\", 3.90mm Width)
Output configurationPositive
Synchronous rectifierYes

Product details

Dual 1.5A/2A buck in a 28-QSOP

The Maxim Integrated MAX1774EEI+ is a dual-output step-down (buck) switching regulator that delivers 1.5A on one channel and 2A on the other, both adjustable via external resistor dividers. It accepts a wide input range from 2.7V up to 28V, making it suitable for multi-rail systems derived from a 5V, 12V, or 24V supply bus. The 1.25MHz fixed switching frequency keeps external inductor and capacitor values small, shrinking the overall footprint. Typical applications include distributed power architectures, point-of-load regulation in telecom/networking gear, and battery-powered equipment where two regulated rails are required from a single controller.

The MAX1774EEI+ comes in a 28-lead QSOP (0.154" wide, 3.90 mm body width) — a narrow SOIC with a fine pitch. It is a surface-mount part, reworkable with a standard hot-air station.

It remains a current-production item from Maxim Integrated (now part of Analog Devices). The 28-QSOP package is standard and stocked across multiple channels, so lead times are generally manageable for production volumes.

Frequently asked questions

What is the switching frequency of MAX1774EEI+?

The switching frequency is fixed at 1.25MHz. This allows small external inductors and capacitors while keeping switching losses manageable.

What are the alternatives to MAX1774EEI+?

Within the same dual-buck regulator family, the MAX1774EEI+ is the adjustable-output variant in a 28-QSOP. Pin-compatible fixed-output versions may exist, but the adjustable version offers the most flexibility for setting output voltages via external resistors.