The MAX15118 high-efficiency, current-mode step-down regulator with integrated power switches operates from 2.7V to 5.5V and delivers up to 18A of output current in a small 2mm x 3.5mm package. The MAX15118 offers excellent efficiency with skip mode capability at light-load conditions, yet provides unmatched efficiency under heavy load conditions. The combination of small size and high efficiency makes this device suitable for both portable and nonportable applications.The MAX15118 utilizes a current-mode control architecture with a high-gain transconductance error amplifier, which allows a simple compensation scheme and enables a cycle-by-cycle current limit with fast response to line and load transients. A factory-trimmed switching frequency of 1MHz (PWM operation) allows for a compact, all-ceramic capacitor design.Integrated switches with low on-resistance ensure high efficiency at heavy loads while minimizing critical inductances. The MAX15118’s simple layout and footprint assure first-pass success in new designs.Other features of the MAX15118 include a capacitor-programmable soft-start to reduce inrush current, safe startup into a prebiased output, and enable input and power-good output for power sequencing.The regulator is available in a 28-bump (4 x 7), 2.10mm x 3.56mm WLP package, and is fully specified over the -40°C to +85°C extended temperature range.ApplicationsBase StationsDDR MemoryDistributed Power SystemsNotebooksServers