Analog Devices Inc. ADP2106-1.8-EVALZ

Overview

ADP2106-1.8-EVALZ from Analog Devices is an evaluation board for the ADP2106-1.8 synchronous step-down DC-to-DC converter, delivering a fixed 1.8 V output at up to 1.5 A with ±1% accuracy. It operates from 2.7 V to 5.5 V input, achieves >95% peak efficiency, and supports 1.2 MHz switching frequency using small ceramic capacitors and a 2.2 µH ferrite inductor - optimized for space-constrained power supply validation in portable and embedded systems.

For engineers reviewing the ADP2106-1.8-EVALZ datasheet, ADP2106-1.8-EVALZ pinout, ADP2106-1.8-EVALZ application, or ADP2106-1.8-EVALZ equivalent, this board enables rapid characterization of load/line regulation, PFM/PWM mode transition, output ripple (<20 mV in PWM), transient response (5% overshoot @ 1 A step), and efficiency across input voltage and load conditions - all without custom PCB design.

Technical Context

The ADP2106-1.8-EVALZ implements a current-mode PWM control architecture that seamlessly transitions to pulse-frequency modulation (PFM) at light loads to maintain high efficiency down to 10 mA. Its integrated power switch and synchronous rectifier eliminate external MOSFETs, while programmable soft-start (via C5) and loop compensation (R1/C6) allow stability tuning for varied output capacitor ESR and load dynamics.

This board is preconfigured for fixed 1.8 V output using the ADP2106-1.8 IC (not adjustable), with dedicated components including dual 22 µF X5R output capacitors (C3/C4), 2.2 µH LPS4012-222 inductor (L1), 182 kΩ compensation resistor (R1), and 56 pF NPO compensation capacitor (C6) - all selected per Analog Devices' recommended layout and thermal management guidelines.

Key Specifications

Availability

ADP2106-1.8-EVALZ is available at Aetrix Electronics and suitable for power supply validation, DC-DC converter qualification, and embedded system bring-up requiring stable component supply, traceable sourcing, and documented performance benchmarks.

Supply support for ADP2106-1.8-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, serving precision instrumentation, industrial automation, communications, and automotive markets.

The ADP2106 product line delivers highly integrated, high-efficiency step-down converters targeting space- and power-constrained applications such as portable medical devices, wearables, and IoT edge nodes - emphasizing minimal external component count and robust transient response.

FAQ

What is the purpose of the ADP2106-1.8-EVALZ?

The ADP2106-1.8-EVALZ is a fully assembled and tested evaluation board designed exclusively for characterizing the ADP2106-1.8 synchronous buck converter. It provides immediate access to key performance metrics - including efficiency, load/line regulation, transient response, and output ripple - without requiring custom PCB development. The ADP2106-1.8-EVALZ is not intended for production use but serves as a reference platform for validating power architecture decisions early in the design cycle.

Does the ADP2106-1.8-EVALZ support adjustable output voltage?

No. The ADP2106-1.8-EVALZ is configured for a fixed 1.8 V output using the ADP2106-1.8 IC and associated resistor network (R4 = 0 Ω, R5 unpopulated). Unlike the ADP2106-EVAL variant, its output voltage cannot be modified via external feedback resistors. Any attempt to alter the output requires replacing the U1 IC with an ADP2106-ADJ and redesigning the feedback divider - which voids the board's validated configuration and calibration.

What are the critical test points on the ADP2106-1.8-EVALZ?

The ADP2106-1.8-EVALZ includes labeled test points for VIN, VOUT, GND, EN, and LX (switch node), plus dedicated pads for measuring inductor current and output capacitor ripple. Key measurement locations include the positive/negative terminals of C3/C4 for AC-coupled output ripple analysis, the LX pin (Pin 13/14 of U1) for switch-node waveform capture, and the input/output capacitor banks for accurate voltage and current sensing - all aligned with Analog Devices' recommended probing methodology in the user guide.

How is thermal performance managed on the ADP2106-1.8-EVALZ?

The ADP2106-1.8-EVALZ uses the ADP2106-1.8 IC in a 17-lead LFCSP package with an exposed thermal pad soldered directly to a large internal copper plane. The board layout features multiple thermal vias under the IC pad and generous ground copper pours on both layers to dissipate heat effectively. Under full 1.5 A load at 5.5 V_IN, the IC case temperature rise remains within safe limits per the ADP2106 datasheet, enabling sustained operation without forced airflow.

Can the ADP2106-1.8-EVALZ be used to evaluate PFM mode behavior?

Yes. The ADP2106-1.8-EVALZ inherently supports automatic transition from PWM to PFM mode below ~100 mA load, as implemented by the ADP2106-1.8 IC. Figure 4 in the user guide shows the characteristic burst-mode waveform at 10 mA load, with output ripple up to 50 mV_pp. Engineers can directly observe PFM entry/exit thresholds, light-load efficiency gains (>85% at 10 mA), and dynamic mode-switching behavior using standard oscilloscope measurements on VOUT and LX - confirming suitability for always-on, low-power applications.