Integrated power solution combines quad buck regulators and 200 mA LDO

August 13, 2013 // By Graham Prophet
The 5-channel power control device from Analog Devices, ADP5052, combines four high performance buck regulators and one 200 mA low dropout (LDO) regulator in a 48-lead LFCSP package that meets demanding performance and board space requirements. The device enables direct connection to high input voltages up to 15V with no preregulators.

Channel 1 and Channel 2 integrate high-side power MOSFETs and low-side MOSFET drivers. External NFETs can be used in low-side power devices to achieve an efficiency-optimised solution and deliver a programmable output current of 1.2A, 2.5A, or 4A. Combining Channel 1 and Channel 2 in a parallel configuration can provide a single output with up to 8A of current.

Channel 3 and Channel 4 integrate both high-side and low-side MOSFETs to deliver output current of 1.2A.

The switching frequency of the ADP5052 can be programmed or synchronised to an external clock. The ADP5052 contains a precision enable pin on each channel for power-up sequencing or adjustable UVLO threshold. It integrates a general-purpose LDO regulator with low quiescent current and low dropout voltage that provides up to 200 mA of output current.

You might use the device, Analog suggests, in small-cell base stations, FPGA and processor applications, security and surveillance, or in medical applications.

Features include input voltage range of 4.5 to 15V; ±1.5% output accuracy over full temperature range; 250 kHz to 1.4 MHz adjustable switching frequency; and adjustable/fixed output options via factory fuse.

Analog Devices;