Analog Devices: ADP1851-EVALZ Evaluation Board for ADP1851 Step-Down DC-to-DC Controller

Kit Overview

The Analog Devices ADP1851-EVALZADP1851-EVALZ is an evaluation board to evaluate ADP1851ADP1851. The input range for this evaluation board is 9 V to 15 V, and the regulated output voltage(Vout) is 1.8 V with a maximum 25 A output current. The switching frequency (fSW) of 600 kHz is set to achieve high efficiency. The switching frequency can be also synchro-nized to an external clock signal applied to the SYNC input.

The ADP1851ADP1851 is a wide range input, dc-to-dc, synchronous buck controller capable of running from commonly used 3.3 V to 12 V (up to 20 V) voltage inputs. The device nominally operates in current mode with valley current sensing providing the fastest step response for digital loads. It can also be configured as a voltage mode controller with low noise and crosstalk for sensitive loads.

The ADP1851ADP1851 is ideal in system applications requiring multiple output voltages. The ADP1851 includes a synchronization feature to eliminate beat frequencies between switching devices. It also provides accurate tracking capability between supplies and includes precision enable and power-good functions for simple, robust sequencing.

The ADP1851ADP1851 provides a high speed, high peak current gate driving capability to enable energy efficient power conversion. The device can be configured to operate in power saving mode by skipping pulses, reducing switching losses, and improving efficiency at light load and standby conditions.

The accurate current limit allows design within a narrower range of tolerances and can reduce overall converter size and cost. The ADP1851ADP1851 can regulate down to 0.6 V output using a high accuracy reference with ±1% tolerance over the temperature range of −40°C to +125°C.

Key Applications: Intermediate bus and POL systems requiring sequencing and tracking, including Telecom base station and networking, Industrial and instrumentation, Medical and healthcare