Class G ceramic speaker driver in 20-UCSP
The MAX9788EBP+ is a Class G ceramic speaker driver from Maxim Integrated, delivering 2.4 W into an 8 Ω load from a single mono channel. Class G topology means the output stage switches between multiple supply rails — it uses a higher voltage only when the signal peaks demand it, keeping quiescent loss below what a linear Class AB would draw at the same peak power. The supply range spans 2.7 V to 5.5 V, so the part runs from a single lithium-ion cell or a regulated 3.3 V / 5 V rail without an extra converter.
Package, footprint, and thermal integration
Housed in a 20-ball WFBGA / CSPBGA (0.5 mm pitch), the supplier device package is marked 20-UCSP with a body size of 2.03 x 2.54 mm. The 2.4 W output into 8 Ω drives ceramic speakers common in thin-profile portable devices — the BGA package keeps the board footprint small, but the thermal path relies on the PCB copper area under the package rather than an exposed pad. Rated for -40°C to +85°C ambient, the part covers industrial-temperature environments and extended-range consumer gear.
Active lifecycle and sourcing posture
The MAX9788EBP+ carries an active product status and is RoHS3 compliant.