Power management ICs suit high density solutions
1 min read
A new family of power management ICs, targeted at compact, high density power solutions for RF agile radio and FPGA/processor based applications, has been unveiled by Analog Devices.
The ADP505x is offered as an integrated power solution for picocell and femtocell base stations, as well as portable and handheld devices.
Designed to support Analog Devices' AD9361 RF transceiver for software-defined radio (SDR) applications, it combines multiple buck regulators and LDOs in a single 48lead LFCSP (7 x 7 mm) package, resulting in a power density solution of up to 25W in a 310 mm2 PCB area.
The ADP505x comes with four buck switching regulators and one 200mA LDO. It 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.
The device's 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 4, 2.5 or 1.2A.
All four switching regulators operate over an input voltage range of 4.5 to 15V and are synchronised to a single clock with a wide programmable range (250kHz to 1.4MHz), which have programmable phase shifts (0, 90, 180, 270°) on each buck regulator to reduce input ripple.
