Analog Devices Inc. ADP3654ARHZ-RL

Overview

ADP3654ARHZ-RL from Analog Devices is a high-speed dual low-side MOSFET driver with 4 A peak source/sink current, 10 ns typical rise/fall time at 2.2 nF load, and matched propagation delays between channels. It drives two independent N-channel power MOSFETs in synchronous rectification and DC-to-dc power supplies operating from −40°C to +125°C junction temperature.

For engineers reviewing the ADP3654ARHZ-RL datasheet, ADP3654ARHZ-RL pinout, ADP3654ARHZ-RL application, or ADP3654ARHZ-RL equivalent, key selection criteria include UVLO threshold (4.2 V typ), 3.3 V-compatible inputs, parallelable dual outputs, and thermally enhanced MINI_SO_EP package with exposed pad for high-frequency switching.

Technical Context

The ADP3654ARHZ-RL integrates two independent low-side gate drivers with internal pull-downs on INA/INB inputs, enabling safe default-off operation during floating control conditions. Its UVLO comparator features 0.3 V hysteresis and 4.2 V turn-on threshold, ensuring robust startup/shutdown coordination between low-voltage digital controllers and higher-voltage power stages.

Each channel delivers matched propagation delays (≤2 ns mismatch) and operates across 4.5 V to 18 V supply range. The driver supports parallel operation by tying INA/INB and OUTA/OUTB, increasing effective drive strength while requiring careful PCB layout to balance current sharing between channels.

Key Specifications

Pinout & Package

The ADP3654ARHZ-RL is housed in an 8-lead MINI_SO_EP package with exposed thermal pad (RH-8-1), optimized for high-power density layouts and improved thermal dissipation (θJA = 43°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-side gate driver applications.

Compared with ADP3654ARDZ-RL and LM5113SDX/NOPB, the ADP3654ARHZ-RL offers superior thermal performance (43°C/W vs. 59°C/W) and guaranteed channel-to-channel timing match (≤2 ns), making it optimal for high-frequency, high-reliability synchronous rectifier designs where layout space is constrained.

Availability

ADP3654ARHZ-RL is available at Aetrix Electronics and suitable for AC-to-DC switch mode power supplies, DC-to-dc power supplies, and synchronous rectification applications requiring stable component supply, RoHS-compliant packaging, and extended temperature support.

Supply support for ADP3654ARHZ-RL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADP3654 product line delivers high-speed, thermally robust gate drivers optimized for high-efficiency power conversion systems demanding precise timing, wide supply range, and reliable operation across extreme temperatures.

FAQ

What is the UVLO threshold and hysteresis of the ADP3654ARHZ-RL?

The ADP3654ARHZ-RL features a UVLO turn-on threshold of 4.2 V typical (min 3.8 V, max 4.5 V) and turn-off threshold of 3.9 V typical (min 3.5 V, max 4.3 V), yielding 0.3 V hysteresis. This ensures clean startup and shutdown behavior when interfacing with low-voltage digital controllers, preventing oscillation during supply ramping. The ADP3654ARHZ-RL implements this function internally without external components.

Can the ADP3654ARHZ-RL drive high-side N-channel MOSFETs directly?

No, the ADP3654ARHZ-RL is a dual low-side gate driver only and cannot directly drive high-side N-channel MOSFETs due to lack of bootstrap or level-shift circuitry. It is designed for ground-referenced outputs (OUTA/OUTB). To drive high-side N-channel devices, an external level shifter or dedicated high-side driver must be used in conjunction with the ADP3654ARHZ-RL.

What decoupling capacitor is recommended for the VDD pin of the ADP3654ARHZ-RL?

Analog Devices recommends a 4.7 µF low-ESR ceramic capacitor placed close to the VDD and PGND pins of the ADP3654ARHZ-RL, supplemented by a 100 nF high-frequency ceramic capacitor in parallel. This dual-capacitor arrangement suppresses both low- and high-frequency noise, minimizes VDD rail resonance, and prevents excessive rise times or device damage caused by inductive overshoot on the OUTA/OUTB pins.

Is the ADP3654ARHZ-RL pin-compatible with other ADP36xx family members?

Yes, the ADP3654ARHZ-RL shares the same 8-lead MINI_SO_EP pinout with ADP3654ARHZ, ADP3654ARHZ-R7, and all ADP3654 variants in the RH-8-1 package. Pin functions (INA, INB, OUTA, OUTB, VDD, PGND, NC, EPAD) are identical across these part numbers; only packaging, reel quantity, and branding differ. No PCB changes are needed when substituting within the same package option.

How does the exposed pad (EPAD) of the ADP3654ARHZ-RL connect electrically and thermally?

The EPAD of the ADP3654ARHZ-RL is not connected to any internal pin but is electrically tied to the die substrate, which serves as the internal ground reference. Thermally, it provides the primary heat conduction path from the die to the PCB. For optimal performance, the EPAD must be soldered to a large copper pour connected to PGND, using multiple thermal vias to inner ground planes - this achieves the specified 43°C/W θJA and ensures reliable operation at full load.