Analog Devices Inc. ADP3654ARDZ-R7

Overview

ADP3654ARDZ-R7 from Analog Devices is a high-speed dual low-side MOSFET driver IC designed to independently drive two N-channel power MOSFETs in synchronous buck, half-bridge, and motor drive topologies. It delivers ±4 A peak source/sink current, 10 ns typical rise/fall time (2.2 nF load), and matched propagation delays (≤2 ns) across channels, operating from 4.5 V to 18 V supply at −40°C to +125°C junction temperature.

For engineers reviewing the ADP3654ARDZ-R7 datasheet, ADP3654ARDZ-R7 pinout, ADP3654ARDZ-R7 application, or ADP3654ARDZ-R7 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, parallelable outputs, and precise delay matching for phase-critical power stage control.

Technical Context

The ADP3654ARDZ-R7 integrates two independent gate drivers with internal pull-downs on INA/INB inputs, enabling safe default-off operation during controller initialization. Its UVLO comparator features 0.3 V hysteresis (V_{UVLO_ON} = 4.2 V, V_{UVLO_OFF} = 3.9 V) to ensure controlled startup/shutdown when interfacing low-voltage digital controllers with higher-voltage power stages.

Each channel provides low-impedance output stages capable of driving capacitive loads up to 2.2 nF with minimal ringing, supported by dedicated PGND and exposed thermal pad (EPAD) tied to die substrate ground. Propagation delays are tightly matched (t_D1 = 14–30 ns, t_D2 = 22–35 ns), enabling synchronized switching in dual-phase converters and synchronous rectifiers.

Key Specifications

Pinout & Package

The ADP3654ARDZ-R7 is packaged in an 8-lead SOIC_N_EP (RD-8-4) with exposed thermal pad, optimized for high-current switching and PCB-level heat dissipation (θ_JA = 59°C/W on JEDEC 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5112MMX/NOPB and UCC27524ADR, the ADP3654ARDZ-R7 uniquely balances high drive strength (±4 A), built-in hysteresis-enabled UVLO, and industry-standard SOIC_N_EP packaging-making it optimal for mid-to-high power SMPS and motor drives where robustness, ease of use, and thermal performance are prioritized over marginal skew reduction or ultra-high current.

Availability

ADP3654ARDZ-R7 is available at Aetrix Electronics and suitable for AC-to-DC switch mode power supplies, DC-to-DC power supplies, and motor drives requiring stable component supply, RoHS-compliant sourcing, and guaranteed long-term availability through Analog Devices' product longevity program.

Supply support for ADP3654ARDZ-R7 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 since 1965.

The ADP3654ARDZ-R7 belongs to Analog Devices' high-speed power management driver family, engineered specifically for high-frequency, high-efficiency power conversion systems demanding precise timing, thermal resilience, and seamless integration with digital controllers.

FAQ

What is the UVLO behavior of the ADP3654ARDZ-R7, and how does it affect system startup?

The ADP3654ARDZ-R7 features a precise undervoltage lockout with 4.2 V turn-on and 3.9 V turn-off thresholds at 25°C, plus 0.3 V hysteresis. This ensures the driver remains disabled until VDD reaches a safe operating level and stays enabled down to 3.9 V before shutting off-preventing erratic switching during power ramp-up or brownout. The ADP3654ARDZ-R7's UVLO eliminates need for external supervision circuits when used with 3.3 V digital controllers powering higher-voltage stages.

Can the ADP3654ARDZ-R7 drive high gate charge MOSFETs at 1 MHz switching frequency?

Yes-the ADP3654ARDZ-R7 delivers ±4 A peak current and achieves 10 ns rise/fall times into 2.2 nF loads, enabling reliable drive of MOSFETs with Q_G up to ~120 nC at 1 MHz. For example, driving two IRFS4310Z MOSFETs (Q_G = 120 nC) at 300 kHz yields ~878 mW total loss in SOIC_N_EP, well within thermal limits. At 1 MHz, careful layout and gate resistance optimization are recommended, but the ADP3654ARDZ-R7's specs support such operation with appropriate thermal design.

Is the ADP3654ARDZ-R7 pin-compatible with other dual MOSFET drivers in SOIC-8 packages?

The ADP3654ARDZ-R7 uses an industry-standard SOIC_N_EP pinout (RD-8-4), matching common footprints like the IR2110 and MIC4422. However, pin functions differ: ADP3654ARDZ-R7 has dedicated PGND (Pin 3) and EPAD (Pin 9), while legacy parts may assign GND to Pin 1 or omit exposed pads. Direct replacement requires verification of input logic levels, UVLO thresholds, and thermal pad connection-so the ADP3654ARDZ-R7 is footprint-compatible but not functionally drop-in without review.

How should the exposed pad (EPAD) of the ADP3654ARDZ-R7 be connected on the PCB?

The EPAD of the ADP3654ARDZ-R7 is electrically connected to the die substrate ground and must be soldered to a large, low-impedance PGND copper pour using multiple thermal vias. It is not internally connected to Pin 3 (PGND), but both must be tied together on the PCB. Proper EPAD connection reduces θ_JA by ~30%, lowers junction temperature under load, and improves EMI performance-failure to connect EPAD risks thermal runaway and degraded switching behavior in the ADP3654ARDZ-R7.

Does the ADP3654ARDZ-R7 support parallel operation of its two channels, and what layout considerations apply?

Yes-the ADP3654ARDZ-R7 supports parallel operation: INA and INB are tied together, and OUTA and OUTB are shorted to deliver ±8 A peak current and distribute thermal load. Layout must ensure symmetrical trace lengths and impedances for both channels; mismatched routing causes unequal current sharing and localized heating. The ADP3654ARDZ-R7's matched propagation delays (≤2 ns) make it especially suitable for this configuration, but PCB symmetry is essential to realize the full benefit.