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Analog Devices MAX8545EUB+ — Analog & Data Acquisition

MAX8545EUB+ Buck Controller, 300kHz, 2.7V-28V, 10-uMAX

MPNMAX8545EUB+
End of Life

Analog Devices MAX8545EUB+, step-down (buck) switching controller, 300kHz switching frequency, 2.7V to 28V supply range, synchronous rectifier, 86% max duty cycle, single output, positive configuration, transistor driver output, enable control, -40°C to 85°C operating temperature, 10-TFSOP/10-MSOP package, surface mount.

$3.95Ref. price · indicative, final on quote
Packaging10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX8545EUB+ specifications
ParameterValue
Output typeTransistor Driver
MountingSurface Mount
Voltage - supply (Vcc (Vdd))2.7V ~ 28V
Frequency300kHz
I/O channels1
Output phases1
Duty cycle86%
Operating temperature-40°C ~ 85°C (TA)
PackageTube
FunctionStep-Down
TopologyBuck
Clock syncNo
Case10-TFSOP, 10-MSOP (0.118\", 3.00mm Width)
Control featuresEnable
Output configurationPositive
Synchronous rectifierYes

Product details

Buck controller for 2.7V–28V rails

The MAX8545EUB+ from Analog Devices (formerly Maxim Integrated) is a step-down (buck) switching controller designed for single-output, positive-voltage regulation. It integrates a synchronous rectifier driver, which improves efficiency by replacing the freewheeling diode with a low-RDS(on) MOSFET — a common choice in point-of-load and intermediate bus converters where board space is tight. Switching frequency is 300 kHz. Maximum duty cycle is 86%.

Housed in a 10-pin TFSOP/MSOP package (3.00 mm width, 0.118" body), the MAX8545EUB+ is a surface-mount part suited for dense PCB layouts. The supplier device package is 10-uMAX/uSOP — a common footprint for Maxim's small-outline controllers.

No LTB risk or allocation pressure is reported for this part at this time.

Frequently asked questions

What is the switching frequency of MAX8545EUB+?

The switching frequency is 300 kHz, which determines the inductor and capacitor values needed for the output filter.

Does MAX8545EUB+ have synchronous rectification?

Yes, it includes a synchronous rectifier driver, which improves efficiency by using a MOSFET instead of a Schottky diode for the low-side switch.