NXP Semiconductors MMRF5018HSR5

Overview

MMRF5018HSR5 from NXP Semiconductors is a 125 W CW GaN-on-SiC RF power transistor optimized for wideband operation from 1–2700 MHz, delivering 12.0 dB typical power gain and 40% drain efficiency at 450–2700 MHz under 50 Vdc bias and 200 mA quiescent current. It serves as a rugged, input-matched final-stage amplifier in high-reliability military and infrastructure transmitters.

For engineers reviewing the MMRF5018HSR5 datasheet, MMRF5018HSR5 pinout, MMRF5018HSR5 application, or MMRF5018HSR5 equivalent, key selection criteria include guaranteed 1–2700 MHz performance, >20:1 load VSWR ruggedness at 2500 MHz pulse test, thermal resistance of 0.67 °C/W (IR), and depletion-mode GaN gate biasing sequence compliance.

Technical Context

This GaN HEMT operates in depletion mode with a gate threshold voltage of –3.1 V (typ), requires precise bias sequencing (V_GS set to –5 V before V_DS ramp), and delivers broadband performance without external input matching networks due to internal input matching. Its channel temperature rating of 350 °C enables high-power CW operation when thermally managed via the NI−400S−2SA package's low R_θJC.

The device is characterized in two reference circuits: a 450–2700 MHz wideband layout (Fig. 2) and a 2500 MHz production test fixture (Fig. 6), with guaranteed functional test specs at 125 W peak (25 W avg), 100 μs pulse width, and 20% duty cycle - confirming suitability for radar pulse amplification and wideband jammer stages.

Key Specifications

Pinout & Package

The MMRF5018HSR5 is housed in the NI−400S−2SA air-cavity ceramic package with source-connected backside metallization. The package features two leads: Pin 1 (Gate) and Pin 2 (Drain), with the case (backside) serving as the Source terminal per Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMRF5018HSR5, CGHV1F025S offers lower thermal stress at reduced power but cannot replace it in 125 W applications, while QPD1025 provides near-equivalent output but lacks guaranteed sub-1.2 GHz operation and documented >20:1 VSWR survival - making MMRF5018HSR5 the sole option for full-decade military-grade broadband amplifiers.

Availability

MMRF5018HSR5 is available at Aetrix Electronics and suitable for radar transmitters, public safety radio base stations, EMC test equipment, and wireless infrastructure requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for MMRF5018HSR5 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 communications markets, with deep expertise in RF power technologies.

The MMRF5018HSR5 belongs to NXP's Airfast® GaN RF power transistor family, engineered specifically for high-efficiency, wideband, high-ruggedness amplification in mission-critical defense and infrastructure systems.

FAQ

What is the maximum guaranteed operating frequency range for MMRF5018HSR5?

The MMRF5018HSR5 is characterized and performance-guaranteed for applications operating from 1 MHz to 2700 MHz. Operation outside this band is not validated, and no performance specifications apply beyond 2700 MHz. This range covers HF, VHF, UHF, and S-band systems including radar, public safety radios, and cellular infrastructure.

Does MMRF5018HSR5 require external input matching networks?

No - the MMRF5018HSR5 features internal input matching optimized for extended wideband performance from 450–2700 MHz, as confirmed in the reference circuit (Figure 2) and datasheet Table 4 note (5). External input matching is unnecessary for standard 50 Ω system integration, though output matching remains application-specific.

What is the correct biasing sequence for MMRF5018HSR5?

The MMRF5018HSR5 is a depletion-mode GaN transistor requiring strict bias sequencing: (1) Set V_GS to –5 V (pinch-off), (2) Apply V_DD = +50 V, (3) Adjust V_GS to achieve 220 mA I_DQ, then (4) Apply RF input. Reversing this order risks device damage. Full sequence is detailed in the datasheet "Correct Biasing Sequence" note.

How is thermal management implemented for MMRF5018HSR5?

Thermal management relies on the NI−400S−2SA package's backside-source construction: the metal case (source terminal) must be soldered directly to a thermally conductive heatsink using recommended reflow profiles (AN1908). With R_θJC = 0.67 °C/W, a 100 W dissipation yields ~67 °C case-to-junction rise - requiring heatsink design to maintain T_C ≤ 150 °C per datasheet limits.

Is MMRF5018HSR5 suitable for pulsed radar applications?

Yes - MMRF5018HSR5 is explicitly tested and guaranteed for pulsed operation at 2500 MHz with 100 μs pulse width and 20% duty cycle, delivering 125 W peak (25 W avg) output. Its >20:1 VSWR ruggedness under pulse overdrive confirms suitability for airborne and ground-based radar transmitters subject to antenna mismatch.