General Description

The MAX798 † 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.

Features

♦ 96 Efficiency

♦ 4.5V to 30V Input Range

♦ 1.6V to 6V Adjustable Precision Output

♦ ±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

♦ 150kHz/300kHz Fixed-Frequency PWM Operation

♦ Programmable Soft-Start

♦ 1.2mA Typical Quiescent Current

   (VIN = 12V, VOUT = 2.5V)

♦ 1µA Typical Shutdown Current

Applications

   Notebook and Subnotebook Computers

   PDAs and Mobile Communicators