MAX15021

19-4106; Rev 0; 5/08 Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Tracking/Sequencing Capability www.datasheet4u.com General Description Features o 2.5V to 5.5V Input-Voltage Range o Dual-Output Synchronous Buck Regulators o Integrated Switches for 4A and 2A Output Currents o 180° Out-Of-Phase Operation o Output Voltage Adjustable from 0.6V to VAVIN o Lossless, Cycle-by-Cycle Current Sensing o External Compensation for Maximum Flexibility o Digital Soft-Start and Soft-Stop for Tracking Applications o Digital Soft-Start into a Prebiased Load for Sequencing Applications o Sequencing or Coincident/Ratiometric Tracking o Programmable Switching Frequency from 500kHz to 4MHz o Thermal Shutdown and Hiccup-Mode ShortCircuit Protection o 20µA Shutdown Current o 100% Maximum Duty Cycle o Space-Saving (5mm x 5mm) 28-Pin TQFN Package MAX15021 The MAX15021 is a dual-output, pulse-width-modulated (PWM), step-down DC-DC regulator with tracking (coincident and ratiometric) and sequencing options. The device operates from 2.5V to 5.5V and each output can be adjusted from 0.6V to the input supply (VAVIN). The MAX15021 delivers up to 4A (regulator 1) and 2A (regulator 2) of output current. 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. The MAX15021 utilizes a voltage-mode control scheme with external compensation to provide good noise immunity and maximum flexib...