Analog Devices Inc. ADP3118JCPZ-RL

Overview

ADP3118JCPZ-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, and supports 3000 pF load - used in multiphase desktop CPU supplies per Intel VRM 10.

For engineers reviewing the ADP3118JCPZ-RL datasheet, ADP3118JCPZ-RL pinout, ADP3118JCPZ-RL application, or ADP3118JCPZ-RL equivalent, key selection criteria include bootstrap-enabled high-side drive capability, OD-controlled floating output during shutdown, overlap protection timing, and LFCSP_VD package thermal performance (θ_JA = 50°C/W on 4-layer PCB).

Technical Context

The ADP3118JCPZ-RL implements adaptive overlap protection by monitoring the SW node voltage to enforce turn-off-before-turn-on sequencing between high- and low-side MOSFETs, with fixed 150 ns delay if SW fails to rise first. Its high-side driver uses external BST–SW bootstrap circuitry with optional Boot-Snap components (RBST, CBST2) for slew-rate limiting.

Low-side drive is referenced to VCC/PGND and operates 180° out-of-phase with IN; high-side drive is referenced to the floating SW node and in-phase with IN. The OD pin forces both DRVH and DRVL low to float the output, meeting Intel VRM 10 shutdown requirements.

Key Specifications

Pinout & Package

ADP3118JCPZ-RL is housed in an 8-lead Lead Frame Chip Scale Package (LFCSP_VD), 3 mm × 3 mm body, very thin, dual lead (CP-8-2), with exposed thermal pad for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2110PbF and LM5113MMX/NOPB, ADP3118JCPZ-RL uniquely integrates VRM 10–compliant output disable, adaptive SW-based overlap protection, and LFCSP thermal performance - making it purpose-built for space- and timing-critical multiphase CPU VRMs rather than general-purpose or high-voltage drivers.

Availability

ADP3118JCPZ-RL is available at Aetrix Electronics and suitable for multiphase desktop CPU supplies, VRM 10-compliant server VRMs, and high-frequency point-of-load converters requiring stable component supply, consistent LFCSP packaging, and guaranteed commercial temperature range (0°C to 85°C) performance.

Supply support for ADP3118JCPZ-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 ADP3118 product line delivers highly integrated, thermally optimized MOSFET drivers for CPU voltage regulation modules - designed specifically to meet Intel VRM specifications with minimal external components and robust shoot-through protection.

FAQ

What is the primary function of the OD pin on the ADP3118JCPZ-RL?

The OD (Output Disable) pin on the ADP3118JCPZ-RL is an active-low control input that forces both DRVH and DRVL outputs low simultaneously, floating the output stage during system shutdown. This behavior meets Intel VRM 10 requirements by preventing rapid discharge of the output capacitor and eliminating reverse current paths in multiphase CPU supplies.

Does the ADP3118JCPZ-RL support bootstrapped high-side drive, and what external components are required?

Yes, the ADP3118JCPZ-RL supports bootstrapped high-side drive via the BST and SW pins. Required external components include a bootstrap capacitor (CBST1) between BST and SW, a bootstrap diode (D1), and optionally RBST and CBST2 for slew-rate limiting (Boot-Snap circuit). CBST1 must withstand ≥50 V and be sized based on high-side MOSFET gate charge (Q_GATE) and desired V_GATE.

How does the ADP3118JCPZ-RL prevent shoot-through current between high-side and low-side MOSFETs?

The ADP3118JCPZ-RL prevents shoot-through using adaptive overlap protection that monitors the SW node voltage. Before enabling the low-side driver (DRVL), it waits for SW to fall to ≤1 V after high-side turn-off - or applies a fixed 150 ns delay if SW fails to rise first. This ensures turn-off-before-turn-on sequencing regardless of temperature, supply voltage, or MOSFET gate charge variations.

What is the thermal performance difference between the ADP3118JCPZ-RL and the SOIC-packaged ADP3118JRZ-RL?

The ADP3118JCPZ-RL in LFCSP_VD package has θ_JA = 50°C/W on a 4-layer PCB, versus θ_JA = 90°C/W for the SOIC-packaged ADP3118JRZ-RL. This 45% improvement in thermal resistance allows higher continuous current handling and tighter board layouts in space-constrained VRM designs without additional heatsinking.

Can the ADP3118JCPZ-RL drive high gate charge MOSFETs, or is it limited to low-Q_G devices?

The ADP3118JCPZ-RL is optimized for low gate charge MOSFETs, delivering 25 ns propagation and transition times into 3000 pF loads. While it can drive higher-Q_G devices, performance degrades: rise/fall times increase linearly with load capacitance, and thermal limits may be exceeded under high-frequency, high-duty-cycle operation - especially on the low-side driver.