SC4519

600kHz, 3A Step-Down Switching Regulator POWER MANAGEMENT Description The SC4519 is a current mode switching regulator with an integrated switch, operating at 600kHz with separate sync and enable functions. The integrated switch allows for cost effective low power solutions (peak switch current 3 amps). The sync function allows customers to synchronize to a faster clock in order to avoid frequency beating in noise sensitive applications. High frequency of operation allows for very small passive components. Current mode operation allows for fast dynamic response www.DataSheet4U.com and instantaneous duty cycle adjustment as the input varies (ideal for CPE applications where the input is a wall plug power). applications where battery life is important. SC4519 Features ‹ ‹ ‹ ‹ ‹ ‹ Integrated 3 Amp switch 600kHz frequency of operation Current mode controller Synchronizable to higher frequency up to 1.2MHz 6µA low shutdown current SOIC-8L-EDP Lead-free package. This product is fully WEEE and RoHS compliant Applications XDSL modems CPE equipment DC-DC point of load applications Portable equipment ‹ ‹ ‹ The low shutdown current makes it ideal for portable ‹ The SC4519 is a 600kHz switching regulator synchronizable to a faster frequency from 750kHz to 1.2MHz. Typical Application Circuit D1 1 VIN Enable C3 2 5 8 BST IN SW 3 6 7 C1 L1 VOUT R1 SC4519 EN SYNC FB COMP GND 4 D2 R2 C2 C4 R3 Revision: April 18, 2007 1 www.semtech.com SC4519 POWER MANAGEMENT Absolute Maximum...