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Analog Devices MAX857ESA+ — DC-DC Power Modules

MAX857ESA+ Boost Regulator, 500mA Switch, 8-SOIC

MPNMAX857ESA+
End of Life

Analog Devices MAX857ESA+ boost switching regulator, step-up topology, adjustable output, 500 mA switch current, 500 kHz switching frequency, 0.8 V to 6 V input range, -40°C to 85°C operating temperature, 8-SOIC surface-mount package, tube.

$7.28Ref. price · indicative, final on quote
Analog Devices MAX857ESA+ datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX857ESA+ specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input0.8V
Voltage - output6V
Voltage - output (Min (Fixed))2.7V
Output current500mA (Switch)
Frequency - switching500kHz
I/O channels1
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionStep-Up
TopologyBoost
Case8-SOIC (0.154\", 3.90mm Width)
Output configurationPositive
Synchronous rectifierNo

Product details

Boost regulator for battery-powered gear

The MAX857ESA+ is a step-up (boost) switching regulator from Analog Devices. It takes an input as low as 0.8 V and delivers an adjustable output up to 6 V, with a 500 mA switch current limit.

The 0.8 V minimum input lets you run this off a nearly dead alkaline cell. The 500 mA switch current is the peak the internal switch can handle.

Standard 8-SOIC package — 0.154" wide, 3.90 mm body width. Pin 1 orientation is marked by a dot on the package top. The tube delivery means the parts slide out one by one; store them in conductive foam or ESD bag after opening.

RoHS3 compliant.

Frequently asked questions

Can MAX857ESA+ be used to boost a 1.5V battery to 3.3V?

Yes, the 0.8 V minimum input covers a 1.5 V alkaline cell, and the adjustable output can be set to 3.3 V. The 500 mA switch current is sufficient for light loads like a microcontroller or sensor.

Can MAX857ESA+ generate 5V from a single cell?

Yes, with a 1.5 V input the boost ratio to 5 V is about 3.3:1. The 500 mA switch current limits the output to roughly 150 mA at 5 V, depending on efficiency and inductor selection.