Skip to main content
Log in
Analog Devices MAX17243ETPA+ — DC-DC Power Modules

MAX17243ETPA+ Buck Converter, 3.5-36V Input, 3A Output

MPNMAX17243ETPA+
End of Life

Analog Devices MAX17243ETPA+, Step-Down Buck Regulator, Adjustable (Fixed) Output, 3A, 3.5V to 36V Input, 220kHz to 2.2MHz, 20-WQFN Exposed Pad, -40°C to 85°C.

$7.07Ref. price · indicative, final on quote
Packaging20-WQFN Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX17243ETPA+ specifications
ParameterValue
Output typeAdjustable (Fixed)
MountingSurface Mount
Voltage - input3.5V
Voltage - output10V
Voltage - output (Min (Fixed))1V (3.3V)
Output current3A
Frequency220kHz ~ 2.2MHz
I/O channels1
Operating temperature-40°C ~ 85°C
PackageStrip
FunctionStep-Down
TopologyBuck
Case20-WQFN Exposed Pad
Output configurationPositive
Synchronous rectifierYes

Product details

What this buck regulator brings to the rail

The MAX17243ETPA+ is a step-down (buck) switching regulator from Analog Devices that takes a 3.5V to 36V input rail and delivers a regulated adjustable output from 1V up to 10V at 3A. It integrates a synchronous rectifier, which means the low-side MOSFET is on-die rather than external — that saves a diode and improves efficiency, especially at lower output voltages where the freewheeling diode drop would otherwise dominate losses. Typical applications include point-of-load regulation in industrial control, telecom infrastructure, battery-powered equipment, and distributed power architectures where a wide input range and compact footprint matter.

The 3.5V minimum input allows operation from a 5V rail or a single-cell Li-ion battery. The 36V maximum input covers 24V industrial supplies with margin.

Frequently asked questions

What is the output adjustable range of MAX17243ETPA+?

A fixed 3.3V output option is also available without the divider.

How does MAX17243ETPA+ compare to TPS5430?

The TPS5430 is a 5.5V to 36V input, 3A buck from TI with a fixed 500 kHz switching frequency and external Schottky diode (non-synchronous). The MAX17243ETPA+ integrates the synchronous rectifier, offers a wider adjustable switching frequency range (220 kHz to 2.2 MHz), and has a lower minimum input voltage (3.5V vs 5.5V). The TPS5430 is in an SOIC-8 package; the MAX17243ETPA+ is in a 20-TQFN (5x5 mm) with exposed pad. They are not pin-compatible — the choice depends on whether you need synchronous rectification for efficiency and the wider frequency range, or prefer a larger through-hole-frien