General Description

The MAX1715 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, I/O, and chipset 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

♦ Dual-Mode Fixed 1.8V/3.3V/Adj or 2.5V/Adj Outputs

♦ Adjustable 1V to 5.5V Output Range

♦ 2V to 28V Battery Input Range

♦ 200/300/420/540kHz Nominal Switching Frequency

♦ Over/Undervoltage Protection

♦ 1.7ms Digital Soft-Start

♦ Drives Large Synchronous-Rectifier FETs

♦ Power-Good Indicator

Applications

Notebook Computers

CPU Core Supply

Chipset/RAM Supply as Low as 1V

1.8V and 2.5V I/O Supply