Analog Devices Inc. ADP5304-EVALZ

Overview

ADP5304-EVALZ from Analog Devices is a fully assembled and tested evaluation board designed to characterize the ADP5304 ultralow quiescent current, synchronous step-down DC-DC regulator. It supports both AC and DC input sources via full-bridge rectification, features jumper-configurable enable (EN), output voltage selection (VID), and VINOK monitoring, and delivers a preset 1.8 V output with integrated 2.2 µH inductor and dual 10 µF output capacitors.

For engineers reviewing the ADP5304-EVALZ datasheet, ADP5304-EVALZ pinout, ADP5304-EVALZ application, or ADP5304-EVALZ equivalent, this board enables rapid validation of load/line regulation, efficiency, switching waveform, output ripple, and VINOK threshold behavior under real-world ultralow-power conditions - critical for energy-harvesting and battery-constrained systems.

Technical Context

The ADP5304-EVALZ implements the ADP5304's internal architecture-including its 10-lead LFCSP package, integrated power switch and synchronous rectifier, and internal compensation-within a compact PCB layout featuring test points (TP1–TP6), SIP headers (J1–J9), and configurable jumpers for EN, VID, and VINOK routing. It incorporates a full-bridge rectifier (D1–D5) and Zener clamp (D3) to support AC input up to 6.5 V peak.

Board-level design includes dedicated sensing paths (VOUT_SNS at TP2, GND_SNS at TP4), SW node access (TP1), and isolated ground returns (TP5, TP6) to minimize measurement error during performance characterization. Input voltage monitoring is implemented via resistor divider R1/R2 to set the VINOK rising/falling thresholds per the ADP5304 specification.

Key Specifications

Availability

ADP5304-EVALZ is available at Aetrix Electronics and suitable for energy harvesting, wearable medical sensors, and IoT endpoint development requiring stable component supply, fast prototyping cycles, and validated reference designs for ultralow-power DC-DC conversion.

Supply support for ADP5304-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 ADP5304-EVALZ belongs to Analog Devices' ultralow-power DC-DC evaluation platform family, engineered specifically to accelerate validation of regulators targeting sub-1 µA quiescent current applications in batteryless and ambient-energy-powered systems.

FAQ

What is the primary purpose of the ADP5304-EVALZ?

The ADP5304-EVALZ is a dedicated evaluation board for the ADP5304 synchronous step-down regulator, enabling engineers to measure key performance metrics-including efficiency, load/line regulation, output ripple, and VINOK behavior-under both AC and DC input conditions. It provides immediate access to all critical nodes via test points and jumpers, eliminating custom PCB design for initial characterization of the ADP5304.

Does the ADP5304-EVALZ support AC input, and how is it implemented?

Yes, the ADP5304-EVALZ supports AC input through a discrete full-bridge rectifier formed by four BAT54WS Schottky diodes (D1, D2, D4, D5). The rectified output feeds the ADP5304's PVIN pin, while D3 (PLVA665A) clamps the maximum input to 6.5 V. AC is applied across J2 and J4, and the board automatically regulates based on the VINOK threshold when input energy is sufficient.

How is the output voltage configured on the ADP5304-EVALZ?

The ADP5304-EVALZ ships with a default 1.8 V output set by internal ADP5304 configuration. Output voltage can be adjusted by configuring J8 (VID): connecting to GND selects 3.0 V, to VIN selects 2.5 V, or leaving floating allows external resistor programming. A power cycle is required after changing J8 to update the output voltage setting on the ADP5304-EVALZ.

What test points are provided on the ADP5304-EVALZ for performance measurement?

The ADP5304-EVALZ includes six labeled test points: TP1 (SW node for switching waveform), TP2 (VOUT_SNS), TP4 (GND_SNS) for accurate output voltage measurement, TP3 (VINOK), and TP5/TP6 (dedicated GND returns). These enable low-noise, Kelvin-style probing to avoid lead-induced errors during efficiency, ripple, and regulation testing of the ADP5304-EVALZ.

Is the ADP5304-EVALZ RoHS-compliant and ESD-protected?

Yes, the ADP5304-EVALZ complies with RoHS Directive 2011/65/EU as confirmed in the bill of materials and manufacturing documentation. It also carries ESD-sensitive device handling warnings per Analog Devices' guidance, and includes patented protection circuitry on the ADP5304 IC itself; however, users must observe proper ESD precautions during handling and probing to prevent degradation of the ADP5304-EVALZ performance.