NXP Semiconductors MRFG35002N6T1

Overview

MRFG35002N6T1 from Freescale Semiconductor is a gallium arsenide (GaAs) pseudomorphic high-electron-mobility transistor (PHEMT) RF power FET designed for WLL/MMDS/BWA and UMTS driver applications. It delivers 1.5 W P1dB at 3550 MHz under CW conditions, achieves 10 dB power gain and 27% drain efficiency at 3550 MHz with 158.5 mW average W-CDMA output, and operates from 500 to 5000 MHz in unmatched Class AB configurations for CPE amplifiers.

For engineers reviewing the MRFG35002N6T1 datasheet, MRFG35002N6T1 pinout, MRFG35002N6T1 application, or MRFG35002N6T1 equivalent, this device requires attention to gate bias stability, thermal management via its 15.2 °C/W junction-to-case resistance, S-parameter matching across 0.5–5.45 GHz, and compatibility with 6 V DC supply and 65 mA quiescent drain current in RF driver stages.

Technical Context

This GaAs PHEMT operates in common-source Class AB configuration with V_DS = 6 V and I_DQ = 65 mA. Its unmatched design necessitates external input/output impedance matching networks-verified using Freescale's PLD-1.5 test fixture with Rogers 4350 PCB and specified microstrip dimensions-to achieve optimal W-CDMA linearity (ACPR = –41 dBc) and phase/group delay performance.

Thermal operation is constrained by a maximum channel temperature of 150 °C and a case operating range of –20 to +85 °C, supported by R_θJC = 15.2 °C/W. The device meets JESD22-A113 moisture sensitivity level 1 and RoHS compliance, packaged in plastic CASE 466-03 (STYLE 1) with 1000 units per 12 mm tape-and-reel (T1 suffix).

Key Specifications

Pinout & Package

MRFG35002N6T1 uses a 4-pin plastic surface-mount package (CASE 466-03, STYLE 1), designated PLD-1.5. Pin 1 is Drain, Pin 2 is Gate, Pins 3 and 4 are Source terminals-enabling dual-source connection for improved grounding and thermal conduction in RF PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF7S35015HSR3 and QPD1005, MRFG35002N6T1 offers uniquely optimized 6 V operation, unmatched flexibility, and verified W-CDMA linearity at sub-2 W levels-making it irreplaceable in thermally constrained, low-supply-voltage CPE driver applications despite lower absolute power.

Availability

MRFG35002N6T1 is available at Aetrix Electronics and suitable for fixed wireless access (FWA) CPE, MMDS infrastructure, and UMTS driver amplifier applications requiring stable component supply, long-term obsolescence planning, and traceable sourcing for industrial RF design.

Supply support for MRFG35002N6T1 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

Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of RF power transistors, microcontrollers, and analog ICs for automotive, industrial, and wireless infrastructure markets.

The MRFG35002N6T1 belongs to Freescale's GaAs PHEMT RF power FET product line, engineered specifically for high-linearity, high-efficiency driver amplification in 3.5 GHz wireless broadband systems including WLL, MMDS, BWA, and UMTS.

FAQ

What is the maximum operating frequency range for the MRFG35002N6T1?

The MRFG35002N6T1 is characterized from 500 MHz to 5000 MHz, with key W-CDMA performance data validated at 3550 MHz. Its S-parameters are fully specified up to 5.45 GHz, supporting use in multi-band 3.3–3.8 GHz BWA, UMTS Band I, and MMDS applications when matched appropriately. Operation beyond 5 GHz is not guaranteed by Freescale's published specifications for MRFG35002N6T1.

Does the MRFG35002N6T1 require external matching networks?

Yes, the MRFG35002N6T1 is an unmatched GaAs PHEMT and requires external input and output matching networks to achieve target gain, efficiency, and linearity. Freescale provides a complete test circuit schematic and layout (including microstrip dimensions and capacitor values) in the MRFG35002N6T1 datasheet to guide implementation of these networks on Rogers 4350 PCB material.

What is the recommended gate bias voltage for MRFG35002N6T1 in Class AB operation?

The MRFG35002N6T1 specifies a quiescent gate voltage V_GS(Q) of –1.1 V to –0.6 V at V_DS = 6 V and I_D = 65 mA. A stable, low-noise negative bias supply is required-typically implemented with a resistive divider and bypass capacitors-to maintain consistent Class AB operating point and prevent thermal runaway during RF drive.

Is MRFG35002N6T1 still in active production or obsolete?

The MRFG35002N6T1 has been formally replaced by MRFG35002N6AT1 per Freescale documentation (Rev. 2, Jan. 2008). While MRFG35002N6T1 is no longer actively manufactured, Aetrix Electronics maintains legacy inventory and supports design continuity for existing CPE and infrastructure programs still utilizing this qualified RF FET.

How does the thermal resistance of MRFG35002N6T1 impact heatsink design?

With a junction-to-case thermal resistance (R_θJC) of 15.2 °C/W, the MRFG35002N6T1 demands careful thermal interface design. To keep channel temperature below 150 °C at full 1.5 W RF output, the total thermal path-including PCB copper area, thermal vias, and heatsink-must limit total R_θJA to ≤ 35 °C/W under worst-case ambient (85 °C case temperature), requiring direct metal-core PCB mounting or low-thermal-resistance clip-on heatsinks.