Analog Devices Inc. ADP3623ARHZ-RL

Overview

ADP3623ARHZ-RL from Analog Devices is a high-speed, dual-channel, 4 A low-side MOSFET driver in an 8-lead MINI_SO_EP package with thermal protection. It supports 4.5 V to 18 V supply voltage, delivers 10 ns typical rise/fall times into 2.2 nF load, and features matched propagation delays (≤2 ns mismatch) for synchronous power stage control in DC-to-DC converters.

For engineers reviewing the ADP3623ARHZ-RL datasheet, ADP3623ARHZ-RL pinout, ADP3623ARHZ-RL application, or ADP3623ARHZ-RL equivalent, key selection criteria include its 4.5 V UVLO threshold, open-drain overtemperature warning (OTW), 3.3 V-compatible logic inputs, and parallelable dual outputs for enhanced gate drive strength in high-frequency switching designs.

Technical Context

The ADP3623ARHZ-RL integrates two independent inverting low-side drivers optimized for N-channel MOSFETs, with internal temperature sensing enabling dual-level thermal protection: OTW flag activation at 120°C–150°C and automatic shutdown above 150°C–180°C. Its SD input uses a precision comparator with 240–320 mV hysteresis for reliable system-level fault response.

Designed for compatibility with digital PWM controllers, it accepts 3.3 V logic inputs while operating from higher VDD rails (4.5–18 V), and includes internal pull-downs on INA/INB to ensure MOSFETs remain off during floating-input conditions. The MINI_SO_EP package provides 43°C/W θJA for improved thermal performance in space-constrained power stages.

Key Specifications

Pinout & Package

The ADP3623ARHZ-RL is housed in an 8-lead MINI_SO_EP package with exposed thermal pad (Package Option RH-8-1), optimized for low-inductance PCB layout and efficient heat dissipation in high-current gate drive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADP3623ARHZ-RL, ADP3624ARHZ-RL offers simplified interface for non-inverting control schemes but lacks inverting flexibility, while LM5113SDX/NOPB trades drive strength and integrated thermal safety for lower cost and wider industry adoption - making ADP3623ARHZ-RL optimal for high-efficiency, thermally constrained, high-frequency power stages requiring robust protection.

Availability

ADP3623ARHZ-RL 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 packaging, and guaranteed thermal performance across −40°C to +85°C ambient.

Supply support for ADP3623ARHZ-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 power controllers.

FAQ

What is the UVLO threshold for ADP3623ARHZ-RL?

The ADP3623ARHZ-RL has a UVLO turn-on threshold of 4.2 V (typical) and turn-off threshold of 3.9 V (typical), with 0.3 V hysteresis. This ensures clean startup and shutdown behavior when powered from 5 V rails, preventing oscillation during brownout conditions. The UVLO function is factory-set and not adjustable.

Does ADP3623ARHZ-RL support parallel operation of its two output channels?

Yes, ADP3623ARHZ-RL supports parallel operation: OUTA and OUTB can be tied together to double peak current drive capability to ±8 A, provided INA and INB are driven identically. Layout symmetry and matched trace lengths are essential to ensure balanced current sharing and avoid thermal imbalance between channels.

What is the purpose of the OTW pin on ADP3623ARHZ-RL?

The OTW (Overtemperature Warning) pin on ADP3623ARHZ-RL is an open-drain, active-low output that asserts when the junction temperature reaches 120°C–150°C (typical). It allows system-level thermal management-such as reducing switching frequency or disabling phases-before the device triggers overtemperature shutdown at 150°C–180°C. Multiple ADP3623ARHZ-RL devices can share a single OTW bus via wire-OR.

Can ADP3623ARHZ-RL drive high-side N-MOSFETs directly?

No, ADP3623ARHZ-RL is a dedicated low-side driver and cannot directly drive high-side N-MOSFETs due to lack of bootstrap or charge-pump circuitry. It is designed for ground-referenced outputs (OUTA/OUTB referenced to PGND). For high-side N-MOSFETs, use complementary high-side drivers like ADP3653 or implement external bootstrap networks.

What package type does ADP3623ARHZ-RL use, and why does it matter?

ADP3623ARHZ-RL uses the 8-lead MINI_SO_EP (RH-8-1) package with exposed thermal pad. This package delivers 43°C/W θJA-significantly better than the SOIC_N_EP variant's 59°C/W-enabling higher continuous output current in compact layouts. The exposed pad must be soldered to a thermal copper plane for effective heat transfer and sustained reliability under high-frequency, high-current operation.