UM3506QA - Union Semiconductor

UM3506QA Synchronous Step-Down Converter

The UM3506QA is a complete power conversion module requiring only two low cost ceramic MLCC capacitors. Inductor, MOSFETs, synchronous rectifier and control IC are integrated into a tiny 2.5mm×2.5mm×1.05mm QFN package. The UM3506QA is engineered to simplify design and to minimize layout constraints. It is an ideal choice to be used to replace less efficient.

Features

z Tiny QFN Package 2.5×2.5×1.05 z Integrated Inductor z No Schottky Diode Required z High Efficiency: Up to 90% z 600mA 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 Ef f iciency (%) Light Load Efficiency Light Load Efficiency vs. Input Voltage 100 90 80 70 60 50 40 30 20 ILIOLOAADD==00..55mmAA ILIOLOAADD==00..88mmAA 10 ILIOLOAADD==11..00mmAA 0 VOUT=1.8V 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 Input Voltage (V) ________________________.