EUP3419

EUP3419 Dual 1.5MHz, 1A Synchronous Step-Down Converter DESCRIPTION The EUP3419 contains two independent 1.5MHz constant frequency, current mode, PWM step-down converters. Each converter integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. The EUP3419 is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. Each converter can supply 1A of load current from a 2.5V to 5.5V input voltage. The output voltage can be regulated as low as 0.6V. The EUP3419 can also run at 100% duty cycle for low dropout applications. 25µA per channel quiescent current at light loads increases efficiency and battery life. FEATURES z z z z z z z z z z z z z 25µA Quiescent Current per Channel at Light Load Up to 96% Efficiency 1.5MHz Constant Switching Frequency 1A Load Current on Each Channel 2.5V to 5.5V Input Voltage Range Output Voltage as Low as 0.6V 100% Duty Cycle in Dropout Short Circuit Protection Thermal Fault Protection <1µA Shutdown Current Soft Start Function 3mm × 3mm TDFN-10 Package RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free APPLICATIONS z z z z z Cellular and Smart Phones Microprocessors and DSP Core Supplies PDAs and Portable Media Players Wireless and DSL Modems Digital Still and Video Cameras Typical Application Circuit Figure 1. Adjustable Voltage Regulator DS3419 Ver1.0 Feb. 2010 1 N~§NãtÿmñW3^VÛmw`RyÑb€g–PQlSø Tel: 0755-8398 3377 / 135 9011 2223 EUP3419 Block Diagram F...