What this boost regulator does
The MAX1676EUB+T is a step-up (boost) switching regulator from Analog Devices, designed to generate a programmable positive output voltage from a low-voltage DC source. It operates from an input as low as 0.7 V and accepts up to 5.5 V maximum input, making it suited for battery-powered and portable equipment where the input rail can drop below 1 V. The internal switch is rated for 360 mA or 750 mA depending on the configuration, and the output is adjustable with fixed-voltage options at 2 V, 3.3 V, or 5 V. The switching frequency runs up to 500 Hz, which is on the low side for a modern boost converter—this means external inductor and capacitor values will be larger than what a 1 MHz+ part would need, but the trade-off is lower switching losses and potentially cleaner output. A synchronous rectifier is integrated, eliminating the need for an external Schottky diode in most applications and improving efficiency at light loads. The part is housed in a 10-pin uMAX/uSOP package (3.00 mm width) and is rated for operation from -40°C to 85°C ambient.
Where it fits in a design
This regulator targets applications that need a regulated 3.3 V or 5 V rail from a single-cell alkaline or Li-ion battery, or from a multi-cell battery pack that can sag below 1 V. The surface-mount 10-uMAX/uSOP package fits into compact layouts, and the wide operating temperature range covers most indoor and outdoor industrial equipment. The part is not qualified to AEC-Q100, so it is not intended for automotive powertrain or chassis domains.
What the switch current ratings mean
The datasheet lists the switch current as 360 mA and 750 mA—these are the peak current limits of the internal power switch, not the continuous output current. The actual output current you can draw depends on the input-to-output voltage ratio, the inductor value, and the switching frequency.
Sourcing and lifecycle reality
The part is ROHS3 compliant. For a BOM line that needs a low-input-voltage boost regulator in a 10-uMAX package, this part is a stable choice for both new designs and ongoing production runs.