General Description

The MAX796/MAX797/MAX799 high-performance, step down DC-DC converters with single or dual outputs

provide main CPU power in battery-powered systems. These buck controllers achieve 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

♦ 2.5V to 6V Adjustable Output

♦ Preset 3.3V and 5V Outputs (at up to 10A)

♦ Multiple Regulated Outputs

♦ +5V Linear-Regulator Output

♦ Precision 2.505V Reference Output

♦ Automatic Bootstrap Circuit

♦ 150kHz/300kHz Fixed-Frequency PWM Operation

♦ Programmable Soft-Start

♦ 375μA Typ Quiescent Current (VIN = 12V, VOUT= 5V)

♦ 1μA Typ Shutdown Current

Applications

    Notebook and Subnotebook Computers

    PDAs and Mobile Communicators

    Cellular Phones