Analog Devices Inc. ADP3625ARDZ-RL

Overview

ADP3625ARDZ-RL from Analog Devices is a high-speed, dual-channel, 4 A low-side MOSFET driver with thermal protection, designed for driving two independent N-channel power MOSFETs in switching power supplies. It operates from 4.5 V to 18 V, delivers 10 ns typical rise/fall times into 2.2 nF load, features matched propagation delays (≤2 ns), and includes overtemperature warning (120°C–150°C) and shutdown (150°C–180°C) functions.

For engineers reviewing the ADP3625ARDZ-RL datasheet, ADP3625ARDZ-RL pinout, ADP3625ARDZ-RL application, or ADP3625ARDZ-RL equivalent, key selection criteria include its 4.5 V UVLO threshold, 3.3 V-compatible logic inputs, SOIC_N_EP thermally enhanced package, and dual-channel parallel operation capability for increased drive strength in high-frequency DC-DC and AC-DC converters.

Technical Context

The ADP3625ARDZ-RL implements dual independent low-side gate drivers with inverting input on Channel A (INA) and noninverting input on Channel B (INB), enabling flexible synchronous rectification or half-bridge control topologies. Its internal temperature sensor provides two-tier thermal protection: an open-drain OTW flag (active low at ≥120°C) and automatic shutdown above ≥150°C junction temperature.

It integrates precision UVLO with 0.3 V hysteresis (4.2 V turn-on, 3.9 V turn-off), a fast SD shutdown input with 280 mV hysteresis and sub-75 ns propagation delay, and robust 4 A peak source/sink current per channel - all while maintaining 14 ns typical rising and 22 ns falling propagation delays into 2.2 nF loads.

Key Specifications

Pinout & Package

ADP3625ARDZ-RL uses the 8-lead SOIC_N_EP (RD-8-4) package with exposed thermal pad, optimized for high-current, high-frequency PCB layouts. The exposed pad must be soldered to a large copper pour for thermal performance (θJA = 59°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADP3624ARDZ-RL, ADP3625ARDZ-RL adds inverting input flexibility for synchronous rectification, while LM5113MMX/NOPB trades integrated protection for smaller size and lower drive strength - making ADP3625ARDZ-RL optimal for thermally demanding, high-efficiency AC-DC and isolated DC-DC designs requiring autonomous safety features.

Availability

ADP3625ARDZ-RL is available at Aetrix Electronics and suitable for AC-to-DC switch mode power supplies, synchronous buck converters, and motor drive half-bridges requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support (−40°C to +85°C).

Supply support for ADP3625ARDZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The ADP362x family was developed specifically for high-frequency, high-reliability power conversion systems - emphasizing fast switching, thermal resilience, and seamless integration with digital PWM controllers in telecom, server, and industrial power supplies.

FAQ

What is the UVLO threshold and hysteresis of ADP3625ARDZ-RL?

The ADP3625ARDZ-RL has a UVLO turn-on threshold of 4.2 V (typical) and turn-off threshold of 3.9 V (typical), resulting in 0.3 V hysteresis. This ensures stable operation during supply ramp-up and prevents oscillation during brown-out events in 5 V-powered systems. The specification is guaranteed across −40°C to +85°C ambient temperature.

Does ADP3625ARDZ-RL support parallel operation of its two output channels?

Yes, ADP3625ARDZ-RL supports parallel operation: connect INA and INB together and tie OUTA and OUTB together to double peak drive current to ±8 A. This configuration reduces thermal stress and improves gate drive margin for high-Qg MOSFETs, though careful PCB layout is required to balance current sharing between channels.

What is the function of the OTW pin on ADP3625ARDZ-RL?

The OTW (Overtemperature Warning) pin on ADP3625ARDZ-RL is an open-drain, active-low output that pulls low when the junction temperature reaches ≥120°C (typical). It remains asserted until temperature falls below 110°C (10°C hysteresis), enabling system-level thermal derating before shutdown occurs at ≥150°C.

Can ADP3625ARDZ-RL drive both N-channel MOSFETs and IGBTs?

Yes, ADP3625ARDZ-RL is specified to drive both enhancement-mode N-channel MOSFETs and insulated gate bipolar transistors (IGBTs). Its ±4 A peak output current and fast 10 ns rise/fall times support high-speed switching of devices with gate charges up to ~150 nC at 300 kHz, as confirmed in Analog Devices' theory-of-operation analysis.

What package type and thermal performance does ADP3625ARDZ-RL use?

ADP3625ARDZ-RL uses the 8-lead SOIC_N_EP (RD-8-4) package with exposed thermal pad. Its JEDEC-standard θJA is 59°C/W on a 4-layer board, enabling >1 W continuous power dissipation with proper PCB copper area. The exposed pad must be soldered to a thermal plane for optimal performance.