Analog Devices Inc./Maxim Integrated MAX20801TPBA+

The MAX20801 cell-string optimizer performs MPPT on an isolated PV cell string using an integrated synchronous buck converter and a fast perturb-and-observe control algorithm. This helps a string contribute power across changing irradiance and module operating conditions while limiting output voltage and current electronically.

The manufacturer ordering table calls MAX20801TPBA+ a 10 FCQFN device and specifies package code P105A3F+1, outline 21-100119 and land pattern 90-100039. LCDChip's original product record and package workbook register the corresponding catalog name 10-PowerVQFN; DigiKey also uses 10-PowerVQFN for the case and 10-FCQFN (5.8 × 3 mm) for the supplier package. Confirm that the catalog illustration and footprint match the official drawing before release.

Layout checks

• Use manufacturer outline 21-100119 and land pattern 90-100039.
• Read the bottom-view pin diagram before assigning pads.
• Validate PV current path, thermal resistance and external power components against the reference design.

The registered JPG is not currently available locally. The image and FCQFN/PowerVQFN naming correspondence require manual verification before publication.

The pin assignments below are from the manufacturer's MAX20801 10-FCQFN bottom-view drawing and pin-description table.

Pin numbering is shown from the bottom in the official drawing; do not transfer it to a top-view layout without mirroring the orientation correctly.

Typical efficiency and limit values are not universal guarantees. The peak, CEC and European-weighted efficiencies quoted by the manufacturer are measured on its reference design, not every PCB implementation.

MAX20801TPBA+T is the manufacturer-listed tape-and-reel ordering variant of TPBA+ and exists as an exact model in the LCDChip catalog. The manufacturer lists the same nominal temperature range and 10-FCQFN family package, but procurement, reel quantity and complete order code still need confirmation.

MAX20801TPBB+ and MAX20801TPBD+ also exist as exact LCDChip models. They belong to the manufacturer-listed MAX20801 family, but are not unconditional substitutes: TPBB has a different output-voltage limit, while TPBD has a higher output-current limit. Recheck the panel electrical design, voltage limits, thermal path, footprint and supply-chain requirements before changing suffixes. No link is added to these currently unpublished catalog entries.

MAX20801 was introduced by Maxim Integrated and is maintained in Analog Devices documentation. The manufacturer's Rev. 5 data sheet explicitly includes MAX20801TPBA+ in its ordering table. Verify current lifecycle and availability directly with the manufacturer or an authorized distributor before a new production design.

Confirm complete manufacturer part number, + suffix, package marking, tray packaging and traceability documentation on receipt. Check the official package outline against the actual device and PCB footprint. An illustrative package JPG does not establish device authenticity, and this catalog's registered image remains missing.

Use the latest manufacturer-controlled data sheet, package outline and PV reference design for engineering sign-off. Confirm per-string current, temperature, voltage, reverse-current behavior, thermal limits and PCB layout under the target irradiance profile. Current inventory and price must be reconfirmed separately; the registered package image and package-name mapping require manual inspection before publication.