Analog Devices Inc. ADP3418JR-REEL7

Overview

ADP3418JR-REEL7 from Analog Devices is a dual high-voltage MOSFET driver optimized for synchronous buck converters, featuring bootstrapped high-side drive, anticross-conduction protection, and output disable control per Intel® VRM 10. It drives two N-channel MOSFETs with 20 ns propagation delay (low-side), 30 ns transition time, and supports 12 V supply with 3 nF load capability in desktop CPU power supplies.

For engineers reviewing the ADP3418JR-REEL7 datasheet, ADP3418JR-REEL7 pinout, ADP3418JR-REEL7 application, or ADP3418JR-REEL7 equivalent, key selection criteria include bootstrap-enabled high-side gate drive, overlap protection timing, OD-controlled floating output during shutdown, and SOIC-8 compatibility with Intel VRD/VRM 10-compliant multiphase CPU regulators.

Technical Context

The ADP3418JR-REEL7 integrates independent high-side and low-side drivers with adaptive nonoverlap timing: high-side turn-on is delayed by 50 ns after low-side turn-off, while high-side turn-off triggers SW-node voltage monitoring to ensure SW falls below 1 V before low-side activation. Its bootstrap architecture sustains gate drive for floating high-side MOSFETs using external BST–SW capacitor and diode.

Internal logic accepts a single PWM input to generate complementary, phase-controlled outputs-DRVH in-phase and DRVL 180° out-of-phase-with built-in shoot-through prevention. The OD pin forces both DRVH and DRVL low, enabling rapid output capacitor discharge control during system shutdown per VRM 10 specification.

Key Specifications

Pinout & Package

ADP3418JR-REEL7 is housed in an 8-lead SOIC package (JEDEC MS-012AA, RN-8), with 1.27 mm pitch, 5.00 mm × 4.00 mm body size, and 1.75 mm max height. Pin 1 (BST) is located at top-left corner when notch faces upward.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual synchronous buck gate driver applications.

Compared with LM5109BMM/NOPB and MP6610DJ-LF-Z, the ADP3418JR-REEL7 uniquely delivers VRM 10–compliant OD control, adaptive SW-node–based overlap timing, and 12 V-compatible high-side drive in SOIC-8-making it the only choice for Intel desktop/server CPU VRMs requiring guaranteed shoot-through immunity and coordinated shutdown.

Availability

ADP3418JR-REEL7 is available at Aetrix Electronics and suitable for multiphase CPU power supplies, single-supply synchronous buck converters, and industrial DC-DC modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADP3418JR-REEL7 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 Norwood, MA.

The ADP3418JR-REEL7 belongs to Analog Devices' power management IC portfolio, specifically engineered for high-efficiency, high-density synchronous buck regulator designs targeting Intel VRM/VRD specifications and desktop/server CPU power delivery.

FAQ

What is the primary function of the OD pin on the ADP3418JR-REEL7?

The OD (Output Disable) pin on the ADP3418JR-REEL7 is an active-low control input that forces both DRVH and DRVL outputs low simultaneously, disconnecting both external MOSFETs to float the output. This feature implements Intel VRM 10–compliant shutdown behavior, preventing uncontrolled inductor current decay and enabling safe, coordinated power-down in CPU voltage regulator modules. The ADP3418JR-REEL7 uses OD to meet strict system-level sequencing requirements during thermal faults or processor reset events.

Can the ADP3418JR-REEL7 drive both high-side and low-side N-channel MOSFETs in a synchronous buck topology?

Yes, the ADP3418JR-REEL7 is explicitly designed to drive two N-channel MOSFETs in a nonisolated synchronous buck converter: DRVH controls the high-side switch using a bootstrapped supply referenced to the SW node, while DRVL drives the low-side switch referenced to PGND. Its internal overlap protection prevents shoot-through, and its 1.0–2.5 Ω sinking resistance ensures fast turn-off of both devices. The ADP3418JR-REEL7 achieves this with a single PWM input, eliminating need for external level-shifting or timing logic.

What is the recommended bootstrap capacitor value for the ADP3418JR-REEL7, and why?

Analog Devices recommends a bootstrap capacitor (CBST) between 100 nF and 1 µF for the ADP3418JR-REEL7, with ceramic construction and ≥50 V rating. This range balances charge retention against ESR-induced droop: a 100 nF capacitor suffices for low-gate-charge MOSFETs like IPD30N06 (20 nC QGATE) with ≤200 mV allowed droop, while larger values improve margin under high-frequency or high-QGATE conditions. The ADP3418JR-REEL7 relies on CBST to sustain high-side gate drive during continuous conduction, making capacitor selection critical to avoid DRVH undervoltage and premature high-side turn-off.

How does the ADP3418JR-REEL7 implement anticross-conduction protection?

The ADP3418JR-REEL7 implements anticross-conduction protection via dual mechanisms: (1) a fixed 50 ns delay between DRVL turn-off and subsequent DRVH turn-on, and (2) adaptive SW-node voltage monitoring that delays DRVL turn-on until SW falls below ~1 V after DRVH turn-off. This ensures neither MOSFET conducts during transition, regardless of temperature, supply variation, or MOSFET gate charge differences. The ADP3418JR-REEL7 integrates this logic internally-no external components or configuration are required to guarantee shoot-through immunity.

Is the ADP3418JR-REEL7 compatible with 500 kHz switching frequency operation?

Yes, the ADP3418JR-REEL7 is fully characterized for 500 kHz operation: its 20–35 ns transition times and 10–65 ns propagation delays support clean square-wave gate drive into 3 nF loads at this frequency, and Figure 12 in the datasheet confirms stable 6 mA supply current up to 1200 kHz. Thermal performance remains within limits (θJA = 90°C/W on 4-layer board) under typical 12 V, 500 kHz conditions. The ADP3418JR-REEL7 thus enables high-density, high-efficiency buck converters without sacrificing timing fidelity or thermal headroom.