UM3502QA Datasheet | Union Semiconductor

Description The UM3502QA is a plete power conversion solution requiring only two low cost ceramic MLCC caps. Inductor, MOSFETs, synchronous rectifier and control IC are integrated into a tiny 4mm×4mm×1.05mm QFN package. The UM3502QA is engineered to simplify design and to minimize layout constraints. It is an ideal choice to be used to replace less efficient LDO to achieve improved efficiency in space restricted applications. The UM3502QA is capable of delivering 600m A output current over a wide input voltage range from 2.5V to 5.5V. The UM3502QA is a high-efficiency, step-down DC-DC converter with a constant PWM frequency, current mode architecture. The UM3502QA automatically turns off the synchronous rectifier while the inductor current is low, and enters pulse skipping mode at light load condition. This can increase efficiency. The operation frequency is set to 1.2MHz at normal load condition. The UM3502QA enters shutdown mode and consumes less than 0.1µA when EN pin is pulled low. Applications 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 Features z Ultra Small QFN Package 4.0×4.0×1.05 z Integrated Inductor z No Schottky Diode Required z High Efficiency: Up to 90% z 600m A Output Current z 0.6V Minimum Output Voltage z 2.5V to 5.5V Input Voltage Range z <1µA Shutdown Current z Pulse Skipping Mode Operation z Thermal Fault Protection Typical Application Circuit - CA and CFF are optional. Ef f iciency (%) Light Load Efficiency Light Load Efficiency vs. Input Voltage ILIOLOAADD==00..55mm AA ILIOLOAADD==00..88mm AA ILIOLOAADD==11..00mm AA VOUT=1.8V 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 Input Voltage (V) ________________________________________________________________________ http://.union-ic. Rev.02 Dec.2016 1/13 Pin Configurations (Top View) Top View M:...