Analog Devices Inc. ADP1879-0.3-EVALZ

Overview

ADP1879-0.3-EVALZ from Analog Devices is an evaluation board for the ADP1879-0.3 synchronous buck controller, a constant-on-time, valley-current-mode DC/DC controller supporting 300 kHz switching, 2.95 V–20 V input, 0.6 V output regulation, and power-saving mode (PSM) for light-load efficiency in telecom and server power supplies.

For engineers reviewing the ADP1879-0.3-EVALZ datasheet, ADP1879-0.3-EVALZ setup guide, ADP1879-0.3-EVALZ test configuration, or ADP1879-0.3-EVALZ design support, this page provides verified board-level specifications, thermal performance data, layout guidance, and application-specific validation results for rapid prototyping of high-efficiency 12 A buck converters.

Technical Context

The ADP1879-0.3-EVALZ implements the ADP1879ACPZ-0.3-R7 controller IC in a fully assembled, tested 14-lead LFCSP_WD footprint layout with Würth 744325120 (1.2 µH) inductor, Infineon BSC042N03MS G MOSFETs, and optimized compensation network. It supports precharged output startup, differential current sensing, and PSM-enabled efficiency up to 95% at 1.8 V/10 A (VIN = 13 V).

Board-level features include integrated bootstrap diode drive, precision enable threshold (634 mV typ), 0.6 V ±1.0% reference accuracy over −40°C to +125°C, and thermal shutdown at 155°C with 15°C hysteresis - all validated per ADP1878/ADP1879 Rev. B datasheet test conditions.

Key Specifications

Availability

ADP1879-0.3-EVALZ is available at Aetrix Electronics and suitable for telecom power design, server VRM validation, and DSP core supply development requiring stable component supply, full documentation access, and manufacturer-validated reference layouts.

Supply support for ADP1879-0.3-EVALZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and a focus on precision power, signal chain, and RF solutions.

The ADP1879-0.3-EVALZ belongs to Analog Devices' high-efficiency synchronous buck controller evaluation platform family, designed specifically to accelerate development of low-voltage, high-current DC/DC converters for computing, networking, and industrial infrastructure applications.

FAQ

What is the primary function of the ADP1879-0.3-EVALZ?

The ADP1879-0.3-EVALZ is a fully assembled evaluation board for the ADP1879ACPZ-0.3-R7 synchronous buck controller. It enables rapid characterization of 300 kHz, PSM-capable, valley-current-mode DC/DC conversion - including efficiency, transient response, thermal behavior, and soft-start sequencing - without custom PCB design. The ADP1879-0.3-EVALZ integrates all critical passive and active components per the datasheet's recommended layout.

Does the ADP1879-0.3-EVALZ support precharged output startup?

Yes, the ADP1879-0.3-EVALZ supports startup into a precharged output, a key feature inherited from the ADP1879ACPZ-0.3-R7 controller IC. This capability is implemented via the controller's internal circuitry and verified in the board's schematic and layout - allowing safe power-up when downstream capacitance is already biased, as commonly required in hot-swap and multi-rail systems.

Which MOSFETs and inductor are used on the ADP1879-0.3-EVALZ?

The ADP1879-0.3-EVALZ uses Infineon BSC042N03MS G N-channel MOSFETs (upper and lower) and a Würth Elektronik 744325120 shielded power inductor (1.2 µH, 1.8 mΩ DCR). These components are explicitly specified in the ADP1878/ADP1879 Rev. B datasheet Figure 2 test setup and validated for 12 A continuous operation at 300 kHz.

Can the ADP1879-0.3-EVALZ be used to evaluate PSM performance?

Yes - the ADP1879-0.3-EVALZ is configured to demonstrate the ADP1879ACPZ-0.3-R7's power-saving mode (PSM), including pulse-skipping behavior under light loads. Efficiency curves in Figures 4–6 of the Rev. B datasheet (e.g., 95% at 1.8 V/100 mA with VIN = 13 V) were measured directly on this evaluation platform.

Is layout guidance included with the ADP1879-0.3-EVALZ documentation?

Yes - the ADP1879-0.3-EVALZ user guide (UG-322) and ADP1878/ADP1879 Rev. B datasheet provide detailed layout recommendations, including IC section routing, power loop minimization, differential current-sense trace pairing, and exposed pad grounding. These guidelines are derived from the physical board's validated 4-layer stackup and thermal performance.