MAX798 - Maxim

MAX798 High-Accuracy Step-Down Controller with Synchronous Rectifier for CPU Power

The high-performance, step-down DC-DC converter provides main CPU power in battery-powered systems. This buck controller achieves 96% efficiency by using synchronous rectification and Maxim’s proprietary Idle Mode™ control scheme to extend battery life at full-load (up to 10A) and no-load outputs. The MAX798’s high accuracy meets the demanding requirements o.

Features

o 96% Efficiency o 4.5V to 30V Input Range o 1.6V to 6V Adjustable Precision Output o o o o o ±0.4% Max Total Load-Regulation Error 0.06%/V Max Line-Regulation Error 5V Linear-Regulator Output Precision 2.505V Reference Output Automatic Bootstrap Circuit MAX798 o 150kHz/300kHz Fixed-Frequency PWM Operation o Programmable Soft-Start o 1.2mA Typical Quiescent Current (VIN = 12V, VOUT = 2.5V) o 1µA Typical Shutdown Current ______________Ordering Information PART MAX798ESE TEMP. RANGE -40°C to +85°C PIN-PACKAGE 16 Narrow SO ________________________Applications Notebook and Subnotebook Computer.