General Description

The MAX17020 is a dual Quick-PWM™ step-down power-supply (SMPS) controller with synchronous rectification, intended for main 5V/3.3V or I/O 1.5V/1.05V power generation in battery-powered systems. Low side MOSFET sensing provides a simple low-cost, highly efficient current sense for valley current-limit protection. Combined with the output overvoltage and

undervoltage protection features, this current limit ensures robust output supplies.

Features

♦ Dual Quick-PWM

♦ Internal 100mA 5V or Adjustable Linear Regulator

♦ Independent LDO Bypass Input

♦ Internal Boost Diodes

♦ Secondary Feedback Input Maintains Charge Pump

♦ 3.3V 5mA RTC Power (Always On)

♦ OUT1: 5V or 1.5V Fixed or 0.7V Adjustable Feedback

♦ OUT2: 3.3V or 1.05V Fixed or Dynamic Adjustable

♦ Dynamic 0V to 2V REFIN2 Input on Second SMPS

♦ 2V ±1% 50µA Reference

♦ 6V to 24V Input Range (28V max)

♦ Ultrasonic Mode

♦ Independent SMPS and LDO Enable Controls

♦ Independent SMPS Power-Good Outputs

♦ Minimal Component Count

Applications

Notebook Computers

Main System Supply (5V and 3.3V Supplies)

I/O System Supply (1.5V and 1.05V Supplies)

Graphic Cards

DDR1, DDR2, DDR3 Power Supplies

Game Consoles

Low-Power I/O and Chipset Supplies

Two-to-Four Li+ Cell Battery-Powered Devices

PDAs and Mobile Communicators

Telecommunication