Analog Devices Inc. ADP3654ARDZ

Overview

ADP3654ARDZ from Analog Devices is a high-speed dual low-side MOSFET driver IC designed to independently drive two N-channel power MOSFETs in switching power stages. It delivers 4 A peak source/sink current, 10 ns typical rise/fall time (2.2 nF load), and matched propagation delays (≤2 ns), operating from 4.5 V to 18 V supply across −40°C to +125°C. It enables efficient synchronous rectification in AC/DC and DC/DC converters.

For engineers reviewing the ADP3654ARDZ datasheet, ADP3654ARDZ pinout, ADP3654ARDZ application, or ADP3654ARDZ equivalent, key selection criteria include UVLO threshold (4.2 V typ), 3.3 V-compatible logic inputs, thermally enhanced SOIC_N_EP package with exposed pad, parallel operation capability, and precise channel-to-channel timing matching for high-frequency power stage control.

Technical Context

The ADP3654ARDZ integrates two independent low-side gate drivers with internal pull-downs on INA/INB inputs, ensuring MOSFETs remain off during floating input conditions. Its UVLO comparator features 0.3 V hysteresis (VUVLO_ON = 4.2 V, VUVLO_OFF = 3.9 V) for robust startup/shutdown sequencing when interfaced with low-voltage digital controllers.

Each output channel provides symmetrical 4 A peak sourcing and sinking capability into capacitive loads, with propagation delays tD1 = 14 ns (rising) and tD2 = 22 ns (falling) at 12 V and 2.2 nF. The matched delay between channels (≤2 ns) supports tightly synchronized dual-switch topologies like interleaved buck or synchronous rectifier pairs.

Key Specifications

Pinout & Package

The ADP3654ARDZ is housed in an 8-lead SOIC_N_EP (RD-8-4) package with exposed thermal pad (EPAD), optimized for PCB heat dissipation and high-current switching. Pin 1 and Pin 8 are NC; Pin 3 is PGND (power ground); EPAD must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADP3654ARDZ, ADP3624ARDZ offers reduced drive strength and no UVLO hysteresis-limiting reliability in brown-out conditions-while TC4427ACOA lacks dual integration, thermal enhancement, and timing precision, increasing layout complexity and degrading system-level efficiency in high-frequency power stages.

Availability

ADP3654ARDZ is available at Aetrix Electronics and suitable for AC/DC power supplies, DC/DC converters, and motor drives requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADP3654ARDZ 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 ADP3654ARDZ belongs to Analog Devices' high-speed power driver product line, engineered specifically for high-efficiency, high-frequency switching power conversion systems demanding precise timing, robust fault protection, and thermal resilience.

FAQ

What is the maximum recommended switching frequency for ADP3654ARDZ?

The ADP3654ARDZ supports reliable operation up to 2 MHz in well-designed layouts, though practical limits depend on gate charge (QG) of the driven MOSFET and PCB parasitics. At 12 V supply and 2.2 nF load, its 10 ns rise/fall times and ≤35 ns max propagation delay enable stable operation at ≥1 MHz in interleaved or resonant topologies. For >1.5 MHz, minimize trace inductance and use low-ESR gate resistors to preserve timing integrity in the ADP3654ARDZ.

Does ADP3654ARDZ support parallel operation of its two channels?

Yes, ADP3654ARDZ supports parallel operation: INA and INB are tied together, and OUTA and OUTB are shorted to combine drive strength. This configuration doubles peak current to ±8 A and halves per-channel power dissipation. Layout symmetry is critical-matched trace lengths and shared gate resistor placement are required to ensure balanced current sharing and avoid thermal runaway in the ADP3654ARDZ.

What is the role of the EPAD on ADP3654ARDZ?

The EPAD on ADP3654ARDZ is an exposed thermal pad electrically connected to the die substrate (ground) and thermally coupled to the PCB. It must be soldered to a solid copper ground plane using multiple thermal vias to achieve the specified θJA = 59°C/W. Failure to properly connect the EPAD results in excessive junction temperature rise, derating of output current, and potential thermal shutdown in sustained high-load operation of the ADP3654ARDZ.

Can ADP3654ARDZ drive high-side N-channel MOSFETs?

No, ADP3654ARDZ is a dedicated low-side driver only-it cannot drive high-side N-MOSFETs because it lacks a floating high-voltage level-shift circuit or bootstrap diode integration. Its outputs (OUTA/OUTB) are referenced to PGND and cannot swing above VDD. To drive high-side N-MOSFETs, pair the ADP3654ARDZ with a dedicated high-side driver (e.g., ADP3625) or use a half-bridge gate driver IC that integrates both sides.

What is the purpose of the UVLO hysteresis in ADP3654ARDZ?

The UVLO hysteresis (0.3 V) in ADP3654ARDZ prevents oscillatory enable/disable behavior during supply ramp-up or brown-out events. With VUVLO_ON = 4.2 V and VUVLO_OFF = 3.9 V, the driver remains enabled until VDD drops below 3.9 V, then stays disabled until VDD rises above 4.2 V-ensuring clean power sequencing when used with low-voltage digital controllers. This behavior protects downstream MOSFETs from partial turn-on and shoot-through in the ADP3654ARDZ.