Power management IC targets RF agile radio

Designed to support Analog Devices’ AD9361 RF Transceiver for SDR applications, it can also be used as an integrated power solution for many of Altera’s and Xilinx’s FPGA platforms. The ADP505x combines multiple buck regulators and LDOs (low-dropout regulators) into a single, compact 48-lead LFCSP (7 mm x 7 mm) package resulting in a power density solution of up to 25 W in only a 310 mm² PCB area. It is an extremely versatile multi-output regulator with four buck switching regulators (4 A, 4 A, 1.2 A, 1.2 A) and one 200-mA LDO. The ADP5050 implements an I²C^® interface that allows the input voltage to the device and the die temperature to be monitored, increasing the power solution’s overall reliability. Its integrated design allows a single IC to be designed into many different applications, reducing power supply design time.

The ADP5050/51/52/53 two-high current buck regulators are resistor programmable using an external resistor to allow the power supply designer to quickly trim the current limit to 4A, 2.5A or 1.2A. All four switching regulators operate over a wide input voltage range (4.5 V to 15 V) and are synchronised to a single clock with a wide programmable range (250 kHz to 1.4M Hz), which have programmable phase shifts (0°, 90°, 180°, 270°) on each buck regulator to reduce input ripple.