NXP Semiconductors MRFX1K80N-88MHZ

Overview

MRFX1K80N-88MHZ from NXP Semiconductors is a high-ruggedness, 1800 W CW, 65 V LDMOS RF power transistor optimized for broadband VHF operation at 87.5–108 MHz. It delivers 1670 W output power, 23.8 dB power gain, and 83.5% drain efficiency in 88 MHz reference circuits, serving as the final-stage amplifier in broadcast transmitters and industrial RF heating systems.

For engineers reviewing the MRFX1K80N-88MHZ datasheet, MRFX1K80N-88MHZ pinout, MRFX1K80N-88MHZ application, or MRFX1K80N-88MHZ equivalent, key selection criteria include its 0.06 °C/W thermal resistance, >65:1 load mismatch tolerance at 230 MHz, 179 V drain-source breakdown voltage, and dual-gate/dual-drain configuration enabling push-pull or single-ended RF amplifier designs.

Technical Context

This device is a laterally diffused MOSFET with enhancement-mode N-channel architecture, rated for continuous operation up to 225 °C junction temperature and qualified for 65 V DC drain supply. Its unmatched input/output impedance supports wideband matching from 1.8 to 400 MHz without external tuning networks.

Thermal performance is defined by a 0.06 °C/W junction-to-case resistance under 1800 W CW conditions (98 MHz, TC = 112 °C), and 0.009 °C/W thermal impedance under pulsed operation (230 MHz, 100 µs, 20% duty cycle). ESD protection meets HBM Class 2 (2500 V) and CDM Class C3 (1200 V).

Key Specifications

Pinout & Package

MRFX1K80N-88MHZ uses the OM-1230-4L over-molded plastic package with exposed source-connected backside. The 4-terminal layout supports balanced push-pull configurations and simplifies thermal path design via direct metal baseplate contact.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power transistor applications.

Compared with MRFX1K80N-88MHZ, MRFX1K80GN offers identical RF specs with superior long-term metallization stability, while MRF1K50N trades 170 W output and 0.015 °C/W thermal resistance for lower cost and proven field reliability in legacy installations.

Availability

MRFX1K80N-88MHZ is available at Aetrix Electronics and suitable for FM broadcast transmitters, industrial RF heating systems, MRI excitation amplifiers, and aerospace radar modules requiring stable component supply across multi-year production cycles.

Supply support for MRFX1K80N-88MHZ 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communication infrastructure markets.

The MRFX1K80N-88MHZ belongs to NXP's RF Power LDMOS transistor family, engineered for rugged, high-efficiency broadband amplification in mission-critical industrial, broadcast, and aerospace RF systems.

FAQ

What is the maximum continuous drain voltage rating for MRFX1K80N-88MHZ?

The MRFX1K80N-88MHZ has a maximum drain-source voltage (V_DSS) rating of +179 V DC, verified per JESD22-A114 testing. This rating ensures reliable operation under 65 V DC supply with substantial margin against VSWR-induced voltage doubling during antenna faults or mismatched loads in real-world broadcast and industrial deployments.

Does MRFX1K80N-88MHZ require external ESD protection in PCB layout?

No, MRFX1K80N-88MHZ integrates on-die ESD protection meeting Human Body Model Class 2 (2500 V) and Charge Device Model Class C3 (1200 V). External TVS devices are not required for standard handling and board-level ESD immunity, though system-level surge protection remains advisable for outdoor broadcast enclosures or medical equipment per IEC 61000-4-2.

Can MRFX1K80N-88MHZ be operated in push-pull configuration?

Yes, MRFX1K80N-88MHZ is explicitly designed for both single-ended and push-pull operation, as confirmed in its official features list. Its dual-gate (Gate A/Gate B) and dual-drain (Drain A/Drain B) terminals enable balanced drive and symmetrical current sharing, supporting high-efficiency Class B or AB operation with reduced even-order harmonics in FM broadcast and radar applications.

What thermal interface material is recommended for MRFX1K80N-88MHZ mounting?

NXP recommends a soft, thermally conductive pad such as TG6050-150-150-5.0-0 (t-Global Technology) for MRFX1K80N-88MHZ mounting, as validated in the 87.5–108 MHz reference design. This 5.0 mm thick pad achieves optimal thermal transfer between the exposed source backside and copper baseplate while accommodating mechanical tolerances and minimizing stress on the OM-1230-4L package during thermal cycling.

Is MRFX1K80N-88MHZ suitable for linear amplifier applications?

Yes, MRFX1K80N-88MHZ is explicitly characterized for linear operation with appropriate Class AB biasing, as stated in its features list. At 88 MHz, it achieves 23.8 dB gain and 83.5% efficiency in broadband reference circuits, and harmonic distortion is measured at –31 dBc for the 2nd harmonic-enabling use in Doherty or digital predistortion-based linear transmitters without external harmonic filtering.