Texas Instruments LMG3526R050RQSR

Overview

LMG3526R050 from Texas Instruments is a 650V, 50mΩ GaN-on-Si power FET with fully integrated gate driver, cycle-by-cycle overcurrent protection (<100 ns response), zero-voltage detection (ZVD), and digital temperature PWM reporting. It operates from 7.5V–18V supply, supports up to 3.6 MHz switching, and delivers 15–150 V/ns slew rate control for EMI-optimized hard- and soft-switching in high-density PSUs.

For engineers reviewing the LMG3526R050 datasheet, LMG3526R050 pinout, LMG3526R050 application, or LMG3526R050 equivalent, this page provides verified technical context, validated package mapping, confirmed ZVD functionality, real-world thermal PWM behavior, and two rigorously cross-checked alternative GaN FETs with documented functional distinctions.

Technical Context

The LMG3526R050 integrates a silicon-based gate driver with precision bias generation, enabling robust 200V/ns hold-off and eliminating external level-shifting. Its direct-drive architecture eliminates discrete gate driver propagation delays and reduces loop inductance via top-side cooled 12mm × 12mm VQFN packaging.

ZVD functionality is exclusive to LMG3526R050 (not present in LMG3522R050) and outputs a 75–140 ns pulse on the ZVD pin when zero-voltage switching is detected-enabling real-time topology feedback for resonant and LLC converters without auxiliary sensing circuitry.

Key Specifications

Pinout & Package

LMG3526R050 uses a 52-pin RQS (VQFN) package, 12.00 mm × 12.00 mm, top-side cooled with exposed thermal pad internally connected to SOURCE and NC2 pins. Electrical and thermal paths are physically separated to minimize power loop inductance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar GaN FET applications.

Compared with LMG3526R050, GS66508T demands additional driver and protection ICs-increasing layout complexity and propagation delay-while TPH3205WS lacks hardware-accelerated ZVS confirmation and digital thermal telemetry, limiting real-time adaptive control in high-performance resonant converters.

Availability

LMG3526R050 is available at Aetrix Electronics and suitable for server PSUs, telecom rectifiers, solar inverters, and industrial motor drives requiring stable component supply, long-term lifecycle support, and traceable GaN sourcing.

Supply support for LMG3526R050 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of automotive- and industrial-grade reliability validation.

The LMG352x family targets high-density, high-efficiency switch-mode power conversion-designed specifically to replace silicon MOSFETs and discrete GaN solutions in next-generation PSUs, EV chargers, and renewable energy systems.

FAQ

What is the key functional difference between LMG3526R050 and LMG3522R050?

The LMG3526R050 includes zero-voltage detection (ZVD) functionality-outputting a pulse on Pin 48 when zero-voltage switching is achieved-while the LMG3522R050 lacks this feature entirely. Both share identical R_DS(on), voltage rating, package, and protection features, but only LMG3526R050 enables hardware-accelerated ZVS confirmation for adaptive dead-time control in resonant topologies.

How does the RDRV pin adjust slew rate in LMG3526R050?

The RDRV pin on LMG3526R050 accepts an external resistor to SOURCE to set gate drive strength: 0 Ω yields 150 V/ns, 300 kΩ yields 15 V/ns, and 500 kΩ yields minimum slew rate. This analog control directly tunes switching loss versus EMI without altering gate resistance or layout-verified across –40°C to 125°C junction temperatures.

What does the TEMP pin output represent in LMG3526R050?

The TEMP pin on LMG3526R050 outputs a fixed 9 kHz PWM signal whose duty cycle encodes junction temperature: 0.3% at 25°C, 36.2% at 85°C, 58.5% at 125°C, and 82% at 150°C. This digital thermal telemetry eliminates need for external thermistors or ADCs-enabling direct microcontroller interpretation with no calibration.

Does LMG3526R050 require external gate resistors for stability?

No-LMG3526R050 integrates all gate drive circuitry including precision bias generation and slew-rate control via RDRV. External gate resistors are unnecessary and discouraged; layout must instead prioritize low-inductance SOURCE connections and proper VNEG bypassing (2.2 µF to SOURCE) to ensure stable depletion-mode GaN operation.

What protection features are implemented in hardware within LMG3526R050?

LMG3526R050 implements five hardware-protected functions: cycle-by-cycle overcurrent (OCP), latched short-circuit (SCP), internal overtemperature (OTP), VDD UVLO, and VNEG UVLO-all with sub-100 ns detection and <170 ns FET turn-off. Faults assert the FAULT pin low and optionally trigger OC or ZVD pins depending on event type-no firmware or external logic required.