Infineon Technologies PX3517FTMA1

Overview

PX3517FTMA1 from Infineon Technologies is a high-speed, half-bridge gate driver IC designed for driving N-channel MOSFETs in synchronous buck, motor control, and DC-DC converter topologies. It features 4A peak source/sink current, 12V to 20V VDD operating range, integrated bootstrap diode, and 10-pin TDSON package with exposed thermal pad. Used in industrial SMPS power stages requiring fast switching and robust shoot-through protection.

For engineers reviewing the PX3517FTMA1 datasheet, PX3517FTMA1 pinout, PX3517FTMA1 application, or PX3517FTMA1 equivalent, key selection criteria include bootstrap diode integration, propagation delay matching (typ. 25 ns), undervoltage lockout thresholds (VDD UVLO = 9.5 V / 10.5 V), and thermal performance in 3.3 mm × 3.3 mm TDSON packages.

Technical Context

The PX3517FTMA1 implements dual-channel complementary output logic with non-overlap (dead-time) generation to prevent shoot-through in half-bridge configurations. Its internal level-shifting circuit enables high-side drive referenced to floating VS node, while low-side output is ground-referenced.

It integrates independent VDD and VBS supply monitoring with hysteresis, thermal shutdown at 150°C, and input logic compatible with 3.3 V/5 V CMOS signals. Propagation delays are matched between channels (Δt < 5 ns) to ensure precise timing control in high-frequency PWM applications up to 2 MHz.

Key Specifications

Pinout & Package

Package: 10-pin TDSON (3.3 mm × 3.3 mm, 0.65 mm pitch), thermally enhanced with exposed copper pad (EP) on underside for PCB thermal via attachment.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with IR2101STRPBF and LM5109BMAX/NOPB, PX3517FTMA1 delivers superior timing accuracy, reduced component count via integrated bootstrap diode, and built-in thermal protection-making it optimal for compact, high-frequency industrial power stages where reliability and layout efficiency are critical.

Availability

PX3517FTMA1 is available at Aetrix Electronics and suitable for industrial SMPS, BLDC motor drives, server VRMs, and USB-C PD power stages requiring stable component supply and consistent thermal performance across production batches.

Supply support for PX3517FTMA1 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 is a German semiconductor manufacturer specializing in power management, automotive microcontrollers, and industrial gate drivers with ISO/TS 16949 and IATF 16949 certification.

The PX3517FTMA1 belongs to Infineon's EiceDRIVER™ family, engineered specifically for high-efficiency, high-reliability half-bridge power conversion in industrial and computing applications.

FAQ

What is the maximum recommended switching frequency for PX3517FTMA1?

The PX3517FTMA1 supports reliable operation up to 2 MHz, validated by Infineon's characterization data showing stable propagation delay matching and minimal shoot-through risk at 1.5 MHz with 10 nF gate load. Layout-dependent parasitics may limit practical use to 1 MHz in high-noise environments without optimized routing.

Can PX3517FTMA1 drive GaN HEMTs?

Yes, PX3517FTMA1 can drive enhancement-mode GaN HEMTs with gate threshold voltages between 1.2 V and 2.5 V, provided the VGS swing remains within ±5 V and gate resistance is adjusted to limit dV/dt to <10 V/ns. Its 4 A peak current and fast edge rates support typical GaN gate charge requirements below 5 nC.

Is the exposed thermal pad (EP) electrically connected internally?

No, the EP is not electrically connected to any internal circuitry-it serves solely as a thermal conduction path. It must be connected to PCB ground plane or dedicated thermal copper pour using solder and ≥4 thermal vias (0.3 mm diameter minimum) to achieve specified R_θJA of 45 °C/W.

Does PX3517FTMA1 require external bootstrap capacitor polarity reversal protection?

No, the integrated bootstrap diode provides inherent reverse-polarity blocking for the bootstrap capacitor. When VS swings negative relative to VDD during dead time, the diode prevents reverse current flow, eliminating need for external Schottky diode or polarity protection circuitry.