General Description

The MAX15022 is a dual-output, pulse-width-modulated (PWM), step-down DC-DC regulator with dual LDO controllers. The device operates from 2.5V to 5.5V and each output can be adjusted from 0.6V to the input supply (VAVIN). The MAX15022 delivers up to 4A (regulator 1) and 2A (regulator 2) of output current with two LDO controllers that can be used to drive two external PNP transistors to provide two additional outputs. This device offers the ability to adjust the switching frequency from 500kHz to 4MHz and provides the capability of optimizing the design in terms of size and performance.

Features

♦ 2.5V to 5.5V Input-Voltage Range

♦ Dual-Output Synchronous Buck Regulators

♦ Integrated Switches for 4A and 2A Output Currents

♦ 180° Out-Of-Phase Operation

♦ Output Voltage Adjustable from 0.6V to VAVIN

♦ Two LDO Controllers

♦ Lossless, Cycle-by-Cycle Current Sensing

♦ External Compensation for Maximum Flexibility

♦ Digital Soft-Start and Soft-Stop for Tracking Applications

♦ Digital Soft-Start into a Prebiased Load for Sequencing Applications

♦ Sequencing or Coincident/Ratiometric Tracking

♦ Programmable Switching Frequency from 500kHz to 4MHz

♦ Thermal Shutdown and Hiccup-Mode ShortCircuit Protection

♦ 30µA Shutdown Current

♦ 100 Maximum Duty Cycle

♦ Space-Saving (5mm x 5mm) 28-Pin TQFN Package

Applications

    RFID Reader Cards

    Power-over-Ethernet (PoE) IP Phones

    Automotive Multimedia

    Multivoltage Supplies

    Networking/Telecom