Maxim's 4A, Synchronous DC-DC Regulators with Integrated MOSFETs Achieve 96% Efficiency in 4mm² Package



Maxim Integrated Products introduces the MAX15050/MAX15051, low-voltage (2.9V to 5.5V), 4A, synchronous DC-DC regulators in a 2mm x 2mm wafer-level package (WLP). These tiny step-down regulators integrate MOSFETs to simplify design, minimize EMI, and save board space. Operation from a fixed 1MHz switching frequency further reduces total solution size, allowing all-ceramic-capacitor designs. Offering peak efficiencies up to 96%, these point-of-load converters minimize power losses in applications ranging from portable devices to networking equipment. The MAX15050 employs a pulse-skip mode to improve light-load efficiency, making it ideal for applications such as notebooks and single-cell portable devices. The MAX15051 operates with a forced PWM mode, allowing it to be used in telecom, networking, and base-station applications. Other features include an enable input and power-good indicator for power sequencing, adjustable soft-start for controlled turn-on, and the ability to safely start up into a pre-biased output. The MAX15050/MAX15051 provide ±1% output-voltage accuracy over load, line, and temperature, and are fully specified over the -40°C to +85°C extended temperature range. Prices start at $2.17 (1000-up, FOB USA). Alt text: High-efficiency DC-DC regulators with MOSFETs simplify design and minimize EMI.