General Description

The MAX17101 is a dual Quick-PWM™ step-down power-supply (SMPS) controller with synchronous rectification, intended for main 5V/3.3V power generation in battery-powered systems. Low-side MOSFET sensing provides a simple low-cost, highly efficient current sense for providing 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 0 to 2V REFIN2 Input on Second Output

♦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)

Graphic Cards

DDR1, DDR2, DDR3 Power Supplies

Game Consoles

Low-Power I/O and Chipset Supplies

Two to Four Li+ Cells Battery-Powered Devices

PDAs and Mobile Communicators

Telecommunication