Triple Buck Regulator Integrated Power Solution

The ADP5056 combines three high performance buck regulators in a 43-terminal land grid array (LGA) package that meets the demanding performance and board space requirements. The device enables direct connection to high input voltages up to 18 V with no preregulators.

All channels integrate both high-side and low-side power metaloxide semiconductor field effect transistors (MOSFETs) to achieve an efficiency optimized solution. Channel 1 and Channel 2 deliver a programmable output current of 3.5 A or 7 A, or provide a single output with up to 14 A of current in parallel operation. Channel 3 delivers a programmable output current of 1.5 A or 3 A.

The switching frequency of the ADP5056 can be programmed or synchronized to an external clock. The ADP5056 contains an enable pin (ENx) on each channel for easy power-up sequencing or adjustable undervoltage lockout (UVLO) threshold.

The ADP5056 integrates start-up/shutdown sequence control, forced pulse-width modulation/power saving mode (FPWM/PSM) selection, an output discharge switch, and a power-good signal.

The ADP5056 is rated at −40°C to +150°C junction temperature.

Note that throughout this data sheet, multifunction pins, such as SYNC/MODE, are referred to either by the entire pin name or by a single function of the pin, for example, SYNC, when only that function is relevant.

* Small cell base stations

* Field programmable gate array (FPGA) and processor applications

* Security and surveillance

* Medical applications

* Wide input voltage range: 2.75 V to 18 V* Bias input voltage range: 4.5 V to 18 V* Operation up to 150°C junction temperature* −0.62% to +0.69% feedback voltage accuracy (−40°C to +125°C junction temperature)* Channel 1 and Channel 2: 7 A synchronous buck regulator (9.4 A minimum valley current limit)* Channel 1 and Channel 2: 14 A output in parallel operation* Channel 3: 3 A synchronous buck regulator (4.2 A minimum valley current limit)* 250 kHz to 2500 kHz adjustable switching frequency