NXP Semiconductors MMRF5018HS-450

Overview

MMRF5018HS-450 from NXP Semiconductors is a 125 W CW GaN-on-SiC RF power transistor optimized for wideband operation from 450–2700 MHz, delivering 100 W CW output at 450–2700 MHz with 12.0 dB power gain and 40% drain efficiency at V_DD = 50 Vdc and T_A = 25°C. It serves as a rugged, input-matched final-stage amplifier in military radar, jammers, and wideband lab amplifiers.

For engineers reviewing the MMRF5018HS-450 datasheet, MMRF5018HS-450 pinout, MMRF5018HS-450 application, or MMRF5018HS-450 equivalent, this page delivers verified electrical specs, thermal performance data, ruggedness validation (≥20:1 VSWR at 2500 MHz), biasing sequence guidance, and production-test fixture impedance references - all specific to the MMRF5018HS-450 variant.

Technical Context

This depletion-mode GaN HEMT features advanced SiC substrate integration for high channel temperature tolerance (T_CH = 350°C) and low thermal resistance (R_θJC(IR) = 0.67°C/W). Its internal input matching enables decade bandwidth operation without external broadband matching networks.

The device operates with V_GS(Q) = –2.8 V (typ) at I_DQ = 220 mA and V_DD = 50 Vdc, and supports pulse operation (100 μs, 20% duty cycle) up to 125 W peak. Load mismatch testing confirms no degradation under >20:1 VSWR across all phase angles at 2500 MHz with 3 dB overdrive.

Key Specifications

Pinout & Package

The MMRF5018HS-450 uses the NI−400S−2SA air-cavity ceramic package with source-connected backside metal. The top-view pin configuration has two terminals: Pin 1 = Gate, Pin 2 = Drain. The case (backside) is electrically connected to the source terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CGHV1F025S and QPD1025, the MMRF5018HS-450 uniquely combines 125 W CW output, 450–2700 MHz coverage, >20:1 VSWR ruggedness, and 350°C channel rating - making it the only option qualified for high-stress military radar and jammer final stages.

Availability

MMRF5018HS-450 is available at Aetrix Electronics and suitable for radar transmitters, electronic warfare systems, public safety radio amplifiers, and wireless test equipment requiring stable component supply across extended product lifecycles.

Supply support for MMRF5018HS-450 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 MMRF5018HS-450 belongs to NXP's Airfast® GaN portfolio, engineered specifically for high-reliability, wideband RF power amplification in defense, aerospace, and infrastructure applications demanding ruggedness and thermal resilience.

FAQ

What is the correct biasing sequence for the MMRF5018HS-450?

The MMRF5018HS-450 is a depletion-mode GaN transistor requiring strict bias sequencing. To turn ON: (1) set V_GS to –5 V (pinch-off), (2) apply V_DD = 50 Vdc, (3) adjust V_GS to achieve I_DQ = 220 mA, then (4) apply RF input. To turn OFF: (1) remove RF, (2) return V_GS to –5 V, (3) discharge V_DD to 0 V, (4) disable V_GS. This prevents gate overvoltage and drain overshoot.

Does the MMRF5018HS-450 require external input matching?

No - the MMRF5018HS-450 is internally input-matched for 450–2700 MHz operation, as confirmed by C_iss = 51.7 pF and measured Z_source values across the band (e.g., 0.8 + j1.8 Ω at 500 MHz). External matching is optional and used only for narrowband optimization; the reference circuit on page 4 achieves 100 W CW without added input network components.

What thermal interface material is recommended for the MMRF5018HS-450?

NXP recommends solder reflow attachment per Application Note AN1908 for the MMRF5018HS-450's NI−400S−2SA package. Conductive epoxy or thermal paste is not advised - the backside source metallization is designed for direct solder bonding to a copper heatsink to maintain R_θJC(IR) = 0.67°C/W. Improper thermal interface increases junction temperature and risks exceeding T_CH = 350°C.

Is the MMRF5018HS-450 suitable for 5G massive MIMO base stations?

The MMRF5018HS-450 supports frequencies up to 2700 MHz, covering sub-3 GHz 5G bands (n1, n3, n8, n40, n41, n77), but its 125 W CW rating and wideband architecture are optimized for macro-cell remote radio heads and test equipment - not active antenna unit (AAU) integrated arrays. For AAUs, lower-power, digitally predistorted GaN MMICs are typically preferred.

How is load mismatch ruggedness validated for the MMRF5018HS-450?

Load mismatch ruggedness of the MMRF5018HS-450 is validated per NXP production test fixture at 2500 MHz using pulsed RF (100 μs, 20% duty cycle) with 3 dB overdrive (5.0 W peak input) into >20:1 VSWR at all phase angles. The device shows zero parametric shift or degradation after testing - confirming suitability for radar and jammer applications where antenna detuning occurs.