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Analog Devices MAX1797EUA+ — DC-DC Power Modules

MAX1797EUA+ Boost Regulator IC, 800 mA Switch

MPNMAX1797EUA+
End of Life

Maxim Integrated MAX1797EUA+, Step-Up Boost Regulator, Adjustable (Programmable) Output Type, 800mA Switch, 500kHz, 1V to 5.5V Input, 8-TSSOP/8-MSOP (0.118", 3.00mm Width), -40°C to 85°C, Tube.

$6.13Ref. price · indicative, final on quote
Packaging8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX1797EUA+ specifications
ParameterValue
Output typeAdjustable (Programmable)
MountingSurface Mount
Voltage - input5.5V
Voltage - output5.5V
Voltage - output (Min (Fixed))2V (3.3V, 5V)
Output current800mA (Switch)
Frequency - switching500kHz
I/O channels1
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionStep-Up
TopologyBoost
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)
Output configurationPositive
Synchronous rectifierYes

Product details

The Maxim Integrated MAX1797EUA+ is a step-up (boost) switching regulator that delivers up to 800 mA on the internal switch from an input voltage as low as 1 V and as high as 5.5 V.

Input range and output flexibility

The 1 V minimum input lets the part start and run from a nearly depleted single-cell battery, while the 5.5 V maximum covers two-cell alkaline or single-cell Li-ion without overvoltage stress.

The synchronous rectifier helps maintain efficiency across load and temperature, reducing heat dissipation in a small package.

Frequently asked questions

Can MAX1797EUA+ be used to generate 3.3 V from a single cell?

Yes. With a minimum input of 1 V, the part can boost a single alkaline or NiMH cell (1.2 V to 1.5 V) to a regulated 3.3 V output, limited by the 800 mA switch current.

What is the typical efficiency of MAX1797EUA+?

Efficiency data is not listed in the available specifications. The synchronous rectifier helps reduce losses compared to a diode-based boost, but actual efficiency depends on input voltage, output load, and inductor selection.

How do I adjust the output voltage with MAX1797EUA+?

The output is set by an external resistor divider connected to the feedback pin, or by selecting one of the preset voltages (3.3 V or 5 V) through the programmable output type. The Adjustable (Programmable) designation means the feedback network determines the regulation point.