UM3503QA - Union Semiconductor

UM3503QA Low Profile Power Module

The UM3503QA is a complete 1A, DC/DC step-down power supply intended for low-power applications. It is capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V. Switching regulator, inductor and input/output capacitors are integrated into a tiny 4mm×4mm×1.05mm QFN package. Unless the external resistor divider, no additional .

Features

z LDO Replacement z FPGA and DSP Point-of-Load Regulator z Cellular and Smart Phones z MCU, DSP and FPGA Core Supplies z Wireless and DSL Modems z Portable Game Consoles and Instruments z PDAs, GPS z Bluetooth Headsets z Battery-Powered Devices z Ultra Small QFN Package 4.0×4.0×1.05 z High Efficiency: Up to 90% z 1A Output Current z 0.6V Minimum Output Voltage z 2.5V to 5.5V Input Voltage Range z 2.25MHz Switching Frequency z 56μA Quiescent Current z <1µA Shutdown Current z Excellent Load Transient and Line Transient z Pulse Skipping Mode Operation z Low Ripple at Light-Load Pulse Skipping M.