Analog Devices Inc. ADP1870-1.0-EVALZ

Overview

ADP1870-1.0-EVALZ from Analog Devices is an evaluation board for the ADP1870-1.0 synchronous buck controller, supporting 1.0 MHz switching frequency, 2.95 V to 20 V input range, and 0.6 V output regulation with ±1.0% reference accuracy. It enables rapid validation of high-efficiency, valley current-mode POL supplies in telecom and server applications.

For engineers reviewing the ADP1870-1.0-EVALZ datasheet, ADP1870-1.0-EVALZ setup guide, ADP1870-1.0-EVALZ test configuration, or ADP1870-1.0-EVALZ alternative evaluation platforms, this page provides verified board-level specifications, layout-critical design notes, thermal performance data, and OEM supply support details specific to the 1.0 MHz variant.

Technical Context

The ADP1870-1.0-EVALZ implements a constant on-time, valley current-mode control architecture optimized for low-duty-cycle operation down to 0.6 V output. It integrates a bootstrap diode, precision enable circuitry, and internal 5 V LDO bias regulator, eliminating external gate-drive components for N-channel MOSFET power stages.

Designed specifically for the ADP1870ARMZ-1.0 (1.0 MHz version), the board supports precharged-load startup, hiccup-mode short-circuit protection, and thermal shutdown at 155°C. Its layout separates analog ground (GND) and power ground (PGND) per IC pin-function requirements and includes differential sensing capability for accurate current monitoring.

Key Specifications

Availability

ADP1870-1.0-EVALZ is available at Aetrix Electronics and suitable for telecom infrastructure, server VRM validation, and DSP core power supply development requiring stable component supply and documented thermal performance.

Supply support for ADP1870-1.0-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.

The ADP1870/ADP1871 product line delivers high-frequency, valley current-mode synchronous buck controllers for point-of-load applications demanding tight regulation, fast transient response, and minimal external component count in space-constrained systems.

FAQ

What is the primary function of the ADP1870-1.0-EVALZ?

The ADP1870-1.0-EVALZ is a fully assembled and tested evaluation board designed to validate the ADP1870ARMZ-1.0 synchronous buck controller. It demonstrates 1.0 MHz operation, supports input voltages from 2.95 V to 20 V, regulates outputs as low as 0.6 V, and includes layout-optimized power and IC sections for accurate efficiency and thermal measurement of the ADP1870-1.0-EVALZ system.

Does the ADP1870-1.0-EVALZ support precharged output startup?

Yes, the ADP1870-1.0-EVALZ supports startup into a precharged load, enabled by the underlying ADP1870ARMZ-1.0's integrated reverse-current protection during soft start. This feature prevents inrush current and ensures safe operation when powering downstream circuits already holding residual voltage, a critical requirement in hot-swap and redundant power systems using the ADP1870-1.0-EVALZ.

What are the key layout features of the ADP1870-1.0-EVALZ?

The ADP1870-1.0-EVALZ implements strict separation between analog ground (GND) and power ground (PGND) traces, follows recommended copper pour and via placement for the exposed pad (connected to GND), and locates high-di/dt paths (SW, DRVH, DRVL) away from sensitive analog nodes (FB, COMP/EN). These practices minimize noise coupling and ensure stable regulation-verified in the ADP1870-1.0-EVALZ design files and application notes.

Can the ADP1870-1.0-EVALZ be used to evaluate PSM (Power Saving Mode)?

No-the ADP1870-1.0-EVALZ is configured for the ADP1870ARMZ-1.0, which does not include Power Saving Mode. PSM is exclusive to the ADP1871 family (e.g., ADP1871ARMZ-1.0). To evaluate PSM functionality, users must select the ADP1871-1.0-EVALZ board; the ADP1870-1.0-EVALZ lacks the necessary internal logic and pin configuration to support pulse-skipping operation.

What thermal performance data is available for the ADP1870-1.0-EVALZ?

Thermal characterization of the ADP1870-1.0-EVALZ shows junction-to-ambient thermal resistance (θJA) of 40°C/W for the LFCSP-packaged ADP1870ARMZ-1.0 on a 4-layer PCB, with thermal shutdown triggering at 155°C. Measured temperature rise under 5 A load at 1.8 V output is ≤28°C above ambient, confirming robust thermal design-data derived from Figure 10–12 and thermal imaging reports in the ADP1870-1.0-EVALZ documentation.