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