Analog Devices Inc. ADP2107-EVALZ

Overview

ADP2107-EVALZ from Analog Devices is an evaluation board for the ADP2107-ADJ synchronous step-down DC-to-DC converter, delivering a user-adjustable output voltage (initially set to 2.5 V) with ±1% regulation accuracy, 2.0 A maximum load current, 1.2 MHz switching frequency, and >95% peak efficiency across 2.7 V–5.5 V input range. It supports rapid prototyping of compact, high-efficiency power supplies in space-constrained embedded systems.

For engineers reviewing the ADP2107-EVALZ datasheet, ADP2107-EVALZ pinout, ADP2107-EVALZ application, or ADP2107-EVALZ equivalent, this board enables hands-on validation of adjustable-output buck converter performance-including load/line regulation, PFM/PWM mode transition, soft-start behavior, and transient response-under real-world PCB layout and thermal conditions.

Technical Context

The ADP2107-EVALZ implements the ADP2107-ADJ IC in a fully assembled, tested configuration optimized for small ferrite-core inductors (D62LCB-2R0M, 2.0 µH) and low-ESR ceramic capacitors (C3/C4 = 22 µF + 10 µF X5R). Its feedback network (R4 = 87.6 kΩ, R5 = 41.2 kΩ) sets the initial 2.5 V output per the ADP2107's 0.8 V internal reference and resistor-divider equation.

It supports programmable soft-start via C5 (1 nF), loop compensation via R1 (140 kΩ) and C6 (68 pF), and enable/shutdown control via J1 jumper and R2 (100 kΩ pull-down). Measurement points for VIN, VOUT, LX node, and inductor current are accessible for oscilloscope-based characterization of ripple, switching waveforms, and transient response.

Key Specifications

Availability

ADP2107-EVALZ is available at Aetrix Electronics and suitable for power supply validation, DC/DC topology benchmarking, and embedded system bring-up requiring stable component supply, traceable sourcing, and documented test configurations.

Supply support for ADP2107-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 industrial, automotive, communications, and healthcare markets with precision power, sensing, and conversion solutions.

The ADP2107-EVALZ belongs to Analog Devices' Power Management evaluation platform family, designed specifically to accelerate development of efficient, compact, and reliable point-of-load (POL) power supplies for portable and space-constrained applications.

FAQ

What is the primary function of the ADP2107-EVALZ?

The ADP2107-EVALZ is a fully assembled evaluation board for the ADP2107-ADJ synchronous step-down DC-to-DC converter. Its purpose is to enable engineers to validate the performance, stability, and layout sensitivity of the ADP2107-ADJ IC under real operating conditions-including efficiency measurement, load transient testing, and compensation tuning-without designing a custom PCB. The ADP2107-EVALZ itself is not a production-ready power module but a design aid for rapid prototyping.

Can the output voltage of the ADP2107-EVALZ be changed, and how?

Yes, the ADP2107-EVALZ features an adjustable output voltage set by resistive divider R4 (87.6 kΩ) and R5 (41.2 kΩ), yielding an initial 2.5 V output based on the ADP2107's 0.8 V internal reference. To change VOUT, replace R4 and R5 using the formula VOUT = 0.8 × (1 + RTOP/RBOT); required recalculations for output capacitors (C3/C4), inductor (L1), and compensation components (R1/C6) must follow the ADP2107 data sheet to maintain stability. The ADP2107-1.8-EVAL variant has fixed 1.8 V output and cannot be adjusted.

What are the key measurement points accessible on the ADP2107-EVALZ?

The ADP2107-EVALZ provides dedicated test points for VIN, VOUT, GND, EN, and LX (switch node), plus solder pads for inductor current monitoring. These allow direct oscilloscope probing to measure input/output ripple (<20 mV in PWM mode), switching waveform amplitude/timing, load transient response (e.g., 5% deviation for 1 A step), and efficiency (η = VOUT×IOUT / VIN×IIN). Probing across C3/C4 captures AC-coupled output ripple; placing the probe at LX with ground on GND reveals the 0 V–VIN switching transition.

Does the ADP2107-EVALZ support both PWM and PFM operation modes?

Yes, the ADP2107-EVALZ demonstrates the ADP2107-ADJ's automatic mode transition: it operates in current-mode PWM at medium-to-heavy loads (e.g., ≥200 mA) for high efficiency and tight regulation, then seamlessly shifts to pulse-frequency modulation (PFM) at light loads (e.g., 10 mA) to reduce quiescent current to 20 µA. This dual-mode behavior is observable on the ADP2107-EVALZ via oscilloscope measurements-PWM shows consistent 1.2 MHz switching with low ripple (<20 mV), while PFM exhibits variable-frequency bursts with higher ripple (up to 50 mV).

Is the ADP2107-EVALZ suitable for production use or safety-critical applications?

No, the ADP2107-EVALZ is strictly intended for device evaluation and engineering development-not for production deployment or life-support systems. Analog Devices explicitly states that evaluation boards are supplied "as is" without warranties of merchantability or fitness for purpose, and prohibits their use in life-support devices or systems. For production, users must design and qualify their own PCB layout based on the ADP2107-ADJ IC's full specifications, thermal requirements, and safety certifications. The ADP2107-EVALZ serves only as a reference for performance validation and design guidance.