Integrated power solution has quad low-noise buck regulators

By Alix Paultre, contributing editor

The ADP5014 from Analog Devices combines four high-performance, low-noise buck regulators in a 40-lead LFCSP package. Relying on its low output noise (~25 μVrms when V_OUT ≤ V_REF ), the low-noise buck regulator enables the powering-up of the noise-sensitive signal chain products.

All channels in the ADP5014 integrate high-side and low-side power metal-oxide semiconductor field effect transistors (MOSFETs). Channel 1 and Channel 2 deliver a programmable output current of 2 A or 4 A. Combining Channel 1 and Channel 2 in a parallel configuration provides a single output with up to 8 A of current.

Channel 3 and Channel 4 deliver a programmable output current of 1 A and 2 A. Combining Channel 3 and Channel 4 in a parallel configuration can provide a single output with up to 4 A of current.

The ADP5014 features two enable modes. The manual mode has four individual precision enable pins to enable each regulator manually. Alternatively, the sequence mode has one grouped precision enable signal with programmable power-up and power-down delay timers on each rail for specific rail sequence requirements. The switching frequency of the ADP5014 can be programmed or synchronized to an external clock from 500 kHz to 2.5 MHz.

The ADP5014 offers other key features like selective forced pulse-width modulation (FPWM)/power-saving mode (PSM), an undervoltage output (UVO), active output discharge, and a power-good flag. Other safety features include input undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

The ADP5014-EVALZ evaluation board combines four high-performance buck regulators in a 40-lead LFCSP package to meet the demanding performance and board space requirements.