Analog Devices Inc. ADP3118JRZ-RL

Overview

ADP3118JRZ-RL 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 (OD) control. It drives two N-channel MOSFETs with 25 ns propagation delay, 25 ns transition time into 3 nF load, and operates across 0°C to 85°C. It is used in multiphase desktop CPU supplies compliant with Intel VRM 10.

For engineers reviewing the ADP3118JRZ-RL datasheet, ADP3118JRZ-RL pinout, ADP3118JRZ-RL application, or ADP3118JRZ-RL equivalent, key selection considerations include bootstrap-compatible high-side drive capability, OD-controlled floating output during shutdown, overlap protection timing, and SOIC-8 package compatibility with VRM 10 power stages.

Technical Context

The ADP3118JRZ-RL integrates separate high-side and low-side drivers sharing one PWM input: DRVH is in-phase with IN and bootstrapped via BST–SW; DRVL is inverted and referenced to PGND. Its overlap protection monitors SW node voltage to enforce dead-time-delaying DRVL turn-on until SW falls below ~1 V after high-side turn-off.

It includes internal 1 V threshold detection on SW, fixed 150 ns delay fallback, and timeout logic (95–190 ns) to prevent shoot-through. The OD pin forces both DRVH and DRVL low, floating the output per Intel VRM 10 shutdown requirements.

Key Specifications

Pinout & Package

ADP3118JRZ-RL is supplied in an 8-lead SOIC_N (R-8) package, 5.00 mm × 4.00 mm body, 1.27 mm pitch, with exposed pad not present. Pin 1 (BST) is located at top-left corner when notch faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2110SPBF and LM5113MMX/NOPB, the ADP3118JRZ-RL uniquely integrates SW-sensed adaptive dead-time, VRM-compliant OD functionality, and single-PWM operation-making it purpose-built for desktop/server CPU power stages rather than general-purpose half-bridges.

Availability

ADP3118JRZ-RL is available at Aetrix Electronics and suitable for multiphase desktop CPU supplies, VRM 10-compliant power modules, and high-frequency server VRM stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADP3118JRZ-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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, power management, and RF applications.

The ADP3118JRZ-RL belongs to Analog Devices' VRM/VRD power driver product line, engineered specifically for high-efficiency, high-current CPU and GPU core voltage regulation with integrated safety and compliance features.

FAQ

What is the operating temperature range specified for the ADP3118JRZ-RL?

The ADP3118JRZ-RL is specified for operation across the commercial temperature range of 0°C to 85°C ambient. Its junction temperature is rated up to 150°C, and it includes thermal protection mechanisms validated within this range. All electrical specifications-including propagation delay, output resistance, and UVLO thresholds-are guaranteed over this full interval per Analog Devices Rev. A datasheet testing methodology.

Does the ADP3118JRZ-RL support bootstrapped high-side drive, and what external components are required?

Yes, the ADP3118JRZ-RL supports bootstrapped high-side drive via its BST and SW pins. Required external components include a bootstrap diode (e.g., 1N4148, ≥15 V rating), two ceramic capacitors (CBST1 and CBST2), and optional slew-rate limiting resistor RBST (1.5–2.2 Ω). CBST1 must withstand ≥50 V; values are calculated based on high-side MOSFET gate charge and desired VGATE, as detailed in the ADP3118JRZ-RL datasheet Application Information section.

How does the overlap protection circuit in the ADP3118JRZ-RL prevent shoot-through current?

The ADP3118JRZ-RL overlap protection circuit monitors the SW pin voltage to enforce dead-time: it delays DRVL turn-on until SW falls below ~1 V after DRVH turn-off. If SW fails to rise first, a fixed 150 ns delay applies. This adaptive timing-combined with internal timeout logic (95–190 ns)-ensures Q1 is fully off before Q2 activates, regardless of MOSFET gate charge, temperature, or supply variation, thereby eliminating shoot-through risk.

What is the function of the OD (Output Disable) pin on the ADP3118JRZ-RL, and how is it used in VRM 10 designs?

The OD pin on the ADP3118JRZ-RL is an active-low control that simultaneously forces both DRVH and DRVL outputs low, floating the power stage output during system shutdown. In VRM 10 designs, this prevents uncontrolled discharge of the output capacitor and ensures safe, coordinated power-down per Intel specification-eliminating the need for external logic to manage multi-phase disable sequencing.

Can the ADP3118JRZ-RL drive high gate charge MOSFETs, and what are the limitations?

The ADP3118JRZ-RL is optimized for low gate charge MOSFETs, with output resistances of 2.2–3.5 Ω (DRVH sourcing) and 2.0–3.2 Ω (DRVL sourcing) enabling fast switching into typical loads. While it can drive higher-Qg devices, sustained high-current gate charging may exceed thermal limits-especially for DRVL-so designers must verify junction temperature rise using the 90°C/W θJA (SOIC) value and derate accordingly per the ADP3118JRZ-RL thermal characteristics graphs.