Analog Devices Inc. ADP3633ARHZ-RL

Overview

ADP3633ARHZ-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 exposed thermal pad. It features matched propagation delays (≤2 ns), 10 ns typical rise/fall times at 2.2 nF load, and operates from 9.5 V to 18 V supply. Designed for synchronous rectification and high-frequency DC-to-DC converters, it drives two independent N-channel power MOSFETs with precise thermal protection.

For engineers reviewing the ADP3633ARHZ-RL datasheet, ADP3633ARHZ-RL pinout, ADP3633ARHZ-RL application, or ADP3633ARHZ-RL equivalent, key selection criteria include its 9.5–18 V UVLO range, dual inverting-input configuration (INA/INB), open-drain OTW flag, and thermally enhanced MINI_SO_EP package optimized for high-current switching in space-constrained power stages.

Technical Context

The ADP3633ARHZ-RL implements dual independent inverting gate drivers with internal temperature sensing, delivering 4 A peak source/sink current per channel and supporting parallel operation to increase drive strength. Its SD input uses a precision comparator with 280 mV hysteresis for reliable shutdown under overvoltage or overtemperature warning conditions.

It integrates dual-level thermal protection: overtemperature warning (OTW) active-low at 120–150°C and overtemperature shutdown at 150–180°C, both with defined hysteresis. The device supports 3.3 V-compatible logic inputs while operating from a higher 9.5–18 V VDD rail-enabling robust interfacing with digital PWM controllers in isolated or multi-rail power systems.

Key Specifications

Pinout & Package

ADP3633ARHZ-RL is housed in an 8-lead MINI_SO_EP package (RH-8-1) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (θ_JA = 43°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 ADP3633ARHZ-RL, ADP3634ARHZ-RL offers identical performance in a pin-compatible package but with non-inverting logic, while LM5113SDX/NOPB trades integration and thermal intelligence for extended high-voltage operation - making ADP3633ARHZ-RL optimal for compact, thermally aware dual-MOSFET drive in 12 V–18 V systems.

Availability

ADP3633ARHZ-RL is available at Aetrix Electronics and suitable for AC-to-DC switch mode power supplies, DC-to-DC converters, and synchronous rectification applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADP3633ARHZ-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 ADP36xx family was developed specifically for high-frequency, high-current gate driving in industrial and communications power supplies - emphasizing thermal resilience, timing precision, and controller interoperability.

FAQ

What is the function of the OTW pin on the ADP3633ARHZ-RL?

The OTW (Overtemperature Warning) pin on the ADP3633ARHZ-RL is an open-drain, active-low output that asserts when the die temperature reaches 120–150°C. It enables system-level thermal monitoring without interrupting operation - for example, triggering fan speed increase or load reduction before shutdown occurs at 150–180°C. This feature is integral to ADP3633ARHZ-RL's dual-stage thermal protection architecture.

Does the ADP3633ARHZ-RL support parallel operation of its two output channels?

Yes, the ADP3633ARHZ-RL supports parallel operation: INA and INB can be tied together, and OUTA and OUTB connected to drive a single high-capacitance MOSFET. This configuration doubles peak current capability to ±8 A and reduces thermal stress per channel. Layout symmetry and matched trace lengths are critical to ensure balanced current sharing - a requirement explicitly documented in the ADP3633ARHZ-RL datasheet Figure 25.

What is the UVLO behavior of the ADP3633ARHZ-RL, and how does it differ from the ADP3623 series?

The ADP3633ARHZ-RL has a UVLO turn-on threshold of 8.7 V typical (range 8.0–9.5 V) and turn-off at 7.7 V typical (7.0–8.5 V), with 1.0 V hysteresis. This differs from the ADP3623 series, which uses a 4.5 V UVLO range - confirming ADP3633ARHZ-RL is optimized for higher-bus applications like 12 V intermediate distribution. The UVLO option is fixed per part number and cannot be modified in-circuit.

Can the ADP3633ARHZ-RL drive high-side N-channel MOSFETs directly?

No, the ADP3633ARHZ-RL is a dedicated low-side driver with outputs referenced to PGND. It lacks a floating high-side supply or level-shifting circuitry required for high-side N-MOSFET drive. To control high-side switches, ADP3633ARHZ-RL must be paired with a bootstrap circuit, isolated gate driver, or complementary high-side driver IC - as confirmed in the ADP3633ARHZ-RL functional block diagram and theory-of-operation section.

What package type and thermal performance does the ADP3633ARHZ-RL use?

The ADP3633ARHZ-RL uses the 8-lead MINI_SO_EP (RH-8-1) package with exposed thermal pad, achieving θ_JA = 43°C/W on a JEDEC 4-layer board. This is 27% lower than the SOIC_N_EP variant (59°C/W), enabling higher power density in compact layouts. The exposed pad must be soldered to a thermal copper pour for effective heat transfer - a requirement specified in the ADP3633ARHZ-RL PCB layout guidelines.