General Description

The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low voltage CPU core or chip-set/RAM supplies in notebook computers.

Features

♦ Ultra-High Efficiency

♦ No Current-Sense Resistor (Lossless ILIMIT)

♦ Quick-PWM with 100ns Load-Step Response

♦ 1 VOUT Accuracy Over Line and Load

♦ 2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range

♦ 2V to 28V Battery Input Range

♦ 200/300/450/600kHz Switching Frequency

♦ Overvoltage Protection (MAX1714A)

♦ Undervoltage Protection

♦ 1.7ms Digital Soft-Start

♦ Drives Large Synchronous-Rectifier FETs

♦ 2V ±1 Reference Output

♦ Power-Good Indicator

Applications

Notebook Computers

CPU Core Supply

Chipset/RAM Supply as Low as 1V

1.8V and 2.5V I/O Supply