UM3503QA

UM3503QA 1A, 2.5V to 5.5V Input, Low Profile Power Module UM3503QA QFN24 4.0×4.0 General Description 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 components are required to accomplish the design. The UM3503QA is engineered to simplify design and to minimize layout constraints. It is ideal replacement of discrete buck converter to save PCB space. The UM3503QA is based on a synchronous step-down DC-DC converter optimized for battery-powered portable applications. The DC/DC converter enters the pulse skipping mode automatically at light load condition. This can increase efficiency. The operation frequency is set to 2.25MHz at normal load condition. The UM3503QA enters shutdo...