Infineon Technologies PX3516ADDGR4XTMA1

Overview

PX3516ADDGR4XTMA1 from Infineon Technologies is a dual high-speed synchronous rectified buck MOSFET driver IC designed to drive N-channel high-side and low-side power MOSFETs in core-voltage regulators. It operates from a single 5V supply (VCC/PVCC), delivers >4A peak sink current on LGATE, supports up to 2MHz PWM frequency, and integrates shoot-through protection - enabling efficient, high-current point-of-load conversion for Intel®/AMD® microprocessors and FPGA power rails.

For engineers reviewing the PX3516ADDGR4XTMA1 datasheet, PX3516ADDGR4XTMA1 pinout, PX3516ADDGR4XTMA1 application, or PX3516ADDGR4XTMA1 equivalent, key selection criteria include gate drive strength (4A LGATE sink), bootstrap-based high-side operation, 3-state PWM input for controller-coordinated shutdown, and TDSON-10-2 thermal performance in multi-phase VR12 systems.

Technical Context

The PX3516 implements independent high-side and low-side drivers with integrated level-shifting and shoot-through protection logic that enforces minimum dead time between UGATE and LGATE transitions. Its bootstrap architecture (BOOT–PHASE) enables high-side N-MOSFET drive without external charge pumps.

It accepts a three-state PWM input (1.37–1.77V shutdown window) to force both outputs into high-impedance state, eliminating need for external Schottky clamps in reversed-voltage protection schemes. Propagation delays are tightly controlled: tD(ON)_UG = 35 ns, tD(OFF)_LG = 7 ns, supporting precise timing in multi-phase digital controllers like Infineon's Primarion™ family.

Key Specifications

Pinout & Package

Package: TDSON-10-2 (10-pin DFN, 3 mm × 3 mm, 0.65 mm pitch, thermally enhanced exposed die pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR3584MTRPBF and LM5113SD/NOPB, the PX3516ADDGR4XTMA1 uniquely combines 3-state PWM support, split VCC/PVCC rails, and hardware shoot-through logic - making it the only option qualified for digital multi-phase VR12 implementations with coordinated phase management.

Availability

PX3516ADDGR4XTMA1 is available at Aetrix Electronics and suitable for Intel® VR12 core regulators, DDR memory POL converters, and FPGA power delivery systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PX3516ADDGR4XTMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in silicon and GaN-based power solutions.

The PX3516 belongs to Infineon's Primarion™ companion driver product line, engineered specifically to interface with digital multi-phase controllers for high-efficiency, high-density CPU/GPU core voltage regulation.

FAQ

What is the purpose of the separate VCC and PVCC pins on the PX3516?

VCC supplies power to internal logic, UVLO circuitry, and PWM input receivers, while PVCC powers the high-current gate drivers (UGATE and LGATE). This separation reduces noise coupling from switching currents into sensitive control circuitry, improves PWM input immunity, and allows independent decoupling - critical for stable operation in high-dI/dt multi-phase systems.

Can the PX3516 drive high-side P-channel MOSFETs?

No. The PX3516 is specifically designed for N-channel high-side MOSFETs using bootstrap gate drive (via BOOT and PHASE pins). It does not support P-MOS high-side configurations, which require negative gate drive or charge-pump architectures absent in this device's topology and pinout.

How is shoot-through protection implemented, and can it be disabled?

Shoot-through protection is hardwired logic that enforces minimum dead time between UGATE turn-off and LGATE turn-on (and vice versa); it cannot be disabled or adjusted. This fixed hardware guardband eliminates reliance on controller-level dead-time programming and prevents destructive cross-conduction under all operating conditions, including startup and fault recovery.

What is the recommended bootstrap capacitor value for typical 1 MHz operation?

For 1 MHz PWM with 50% duty cycle and 4 A peak LGATE sink, a 100 nF X7R ceramic capacitor (rated ≥16 V) between BOOT and PHASE is recommended. This value ensures sufficient charge replenishment per cycle while minimizing voltage droop (<0.5 V) under worst-case load step conditions, as validated in Infineon's AN2013-05 application note.