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| EUP3421 ds3421 ver1.0 jun. 2011 1 2a, synchronous step-down converter description the EUP3421 is a 1 mhz fixed frequency synchronous, current-mode, step-down dc-dc converter capable of providing up to 2a output current. the EUP3421 operates from an input range of 2.7v to 5.5v and provides a regulated output voltage from 0.8v to 5v . the internal synchronous power switch improves efficiency and eliminates the need for an external schottky diode. forced pwm operation provides very low output ripple voltage for noise sensitive applications. the EUP3421 features short circuit and thermal protection circuits to improve system reliability. externally adjustable soft-start avoids input inrus h current during startup. the EUP3421 is available in sop-8 package. typical application circuit features 2.7v to 5.5v input voltage range high efficiency up to 96% 2a available load current 100/60m integrated pfet/nfet switches 1mhz switching frequency 100% duty cycle low dropout operation short circuit and thermal protection integrated uvlo excellent line and load transient response available in sop-8 package rohs compliant and 100% lead(pb)-free halogen-free applications high performance dsps, fpgas, asics and microprocessors base station, telecom, and networking equipment power supplies epc and netpcs figure1. typical application circuit
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