Analog Devices Inc. ADP3412JR

Overview

ADP3412JR from Analog Devices is a dual N-channel MOSFET driver optimized for synchronous buck converters, featuring bootstrapped high-side drive, programmable transition delay (20 ns base + 1 ns/pF), anticross-conduction protection, and 20 ns typical transition time into 3 nF load. It drives CPU core power stages in desktop and mobile computing applications.

For engineers reviewing the ADP3412JR datasheet, ADP3412JR pinout, ADP3412JR application, or ADP3412JR equivalent, key selection criteria include bootstrap voltage tolerance (BST to SW ≤ 8 V), overlap protection timing control via DLY capacitor, propagation delay matching between DRVH/DRVL (≤ 40 ns max difference), and SOIC-8 thermal performance (θJA = 155°C/W).

Technical Context

The ADP3412JR implements adaptive overlap protection: high-to-low transition delay is controlled by SW node voltage monitoring (turn-on of DRVL delayed until SW ≤ 1 V), while low-to-high transition delay is set externally via CDLY capacitor (20 ns + 1 ns/pF). Both drivers deliver ≤ 5 Ω output resistance for sourcing/sinking, enabling 20 ns rise/fall times into 3 nF loads.

Its high-side driver operates with floating bias referenced to SW, requiring external bootstrap diode and capacitor (CBST = 100 nF–1 µF); low-side driver uses direct VCC–PGND bias. Input accepts TTL-level IN signal (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and supports single-PWM control of complementary outputs with built-in phase inversion for DRVL.

Key Specifications

Pinout & Package

ADP3412JR is housed in an 8-lead SOIC package (SOIC-8, JEDEC MS-012AA), with 1.27 mm lead pitch, 5.00 mm × 4.00 mm body, and 1.75 mm maximum height. Thermal resistance is θJA = 155°C/W and θJC = 40°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5102MMX/NOPB and MP6610DQKT-LF-Z, the ADP3412JR uniquely combines adaptive SW-sensing overlap protection, programmable DLY delay, and 5 V–optimized drive strength-making it the only option qualified for multiphase desktop CPU supplies per Analog Devices' reference designs.

Availability

ADP3412JR is available at Aetrix Electronics and suitable for multiphase CPU VRMs, mobile computing power converters, and industrial synchronous buck regulators requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADP3412JR 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and computing markets since 1965.

The ADP3412JR belongs to Analog Devices' power management driver product line, engineered specifically for high-efficiency, high-current synchronous buck converters in computing infrastructure where precision timing and shoot-through immunity are critical.

FAQ

What is the maximum allowable voltage between BST and SW pins on the ADP3412JR?

The ADP3412JR specifies an absolute maximum BST-to-SW voltage of –0.3 V to +8 V. Exceeding +8 V risks permanent damage to the high-side driver output stage. This limit defines the required voltage rating of the external bootstrap capacitor and diode-e.g., a 16 V or higher rated ceramic capacitor is recommended for 12 V input systems to accommodate transients and ripple.

How does the ADP3412JR implement overlap protection, and what role does the SW pin play?

The ADP3412JR uses dual-method overlap protection: the SW pin is actively monitored to delay DRVL turn-on until SW voltage falls to ≤1 V after DRVH turn-off-ensuring the high-side MOSFET is fully off before the low-side turns on. This adaptive sensing eliminates shoot-through across temperature, supply, and MOSFET parameter variations, unlike fixed-delay-only drivers.

Can the ADP3412JR drive 3000 pF gate loads with guaranteed timing performance?

Yes-the ADP3412JR datasheet guarantees 20 ns to 35 ns transition times and 10 ns to 40 ns propagation delays when driving a 3000 pF (3 nF) capacitive load at VCC = 5 V and TA = 25°C. These values are characterized across temperature and supply voltage, and the 3 nF load represents typical gate capacitance of high-performance N-MOSFETs like FDB7030L used in its reference designs.

What is the function of the DLY pin on the ADP3412JR, and how is delay calculated?

The DLY pin on the ADP3412JR sets the low-to-high transition delay (Q2 turn-off to Q1 turn-on) using an external capacitor. The total delay equals 20 ns plus 1 ns per pF of CDLY capacitance (DLY = CDLY × 1 ns/pF + 20 ns). For example, a 30 pF capacitor yields 50 ns total delay-allowing precise tuning to match MOSFET gate charge and layout-induced delays.

Is the ADP3412JR pin-compatible with other Analog Devices dual drivers like the ADP3410?

No-the ADP3412JR is not pin-compatible with the ADP3410. While both are dual N-MOSFET drivers, the ADP3412JR includes dedicated DLY and SW pins for programmable and adaptive overlap control, whereas the ADP3410 uses different pin assignments and lacks SW monitoring. Pinout differences are confirmed in their respective SOIC-8 diagrams: ADP3412JR places SW at Pin 7 and DLY at Pin 3; ADP3410 assigns these functions to other pins.