NXP Semiconductors MRF7S15100HR3

Overview

MRF7S15100HR3 from Freescale Semiconductor is an N-channel enhancement-mode lateral RF power MOSFET optimized for CDMA and W-CDMA base station amplifiers operating at 1470–1510 MHz. It delivers 23 W average output power at 28 V, achieves 19.5 dB power gain and 32% drain efficiency under single-carrier W-CDMA conditions, and supports Class AB/C operation in Doherty configurations.

For engineers reviewing the MRF7S15100HR3 datasheet, MRF7S15100HR3 pinout, MRF7S15100HR3 application, or MRF7S15100HR3 equivalent, key selection criteria include its 100 W CW P1dB, 10:1 VSWR ruggedness at 32 V, integrated ESD protection (HBM Class 1C), NI-780 package with flanged metal-ceramic construction, and verified performance in 3.84 MHz channel bandwidth W-CDMA systems.

Technical Context

This device employs a laterally diffused MOS (LDMOS) structure with internal input/output matching networks, enabling direct 50 Ω system integration without external tuning. Its gate threshold voltage (1.2–2.7 V) and quiescent gate voltage (2.0–3.5 V at IDQ = 600 mA) support stable Class AB biasing across temperature.

The MRF7S15100HR3 is characterized using series-equivalent large-signal impedance parameters (e.g., Zsource = 2.62 − j4.97 Ω, Zload = 3.45 − j3.65 Ω at 1490 MHz), validated for broadband operation from 1410 to 1570 MHz, and rated for continuous junction temperatures up to 225°C with thermal resistance RθJC = 0.65°C/W at 55 W CW.

Key Specifications

Pinout & Package

Package: NI-780 (Case 465-06, Style 1), flanged metal-ceramic hermetic package with copper-tungsten base, designed for high-power RF thermal management and PCB mounting via flange screws.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF7S15100HR3, the MRFE6VP61K25HR5 shifts operational focus to higher bands and raw power, while the PD85003 offers functional overlap in frequency but sacrifices peak power and introduces mechanical incompatibility-making MRF7S15100HR3 optimal for drop-in replacement in existing 1470–1510 MHz W-CDMA infrastructure.

Availability

MRF7S15100HR3 is available at Aetrix Electronics and suitable for macro base station transmitters, remote radio heads, Doherty power amplifiers, and CDMA2000 integrated PA modules requiring stable component supply and long-term lifecycle support.

Supply support for MRF7S15100HR3 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) is a global leader in RF power solutions, specializing in high-reliability LDMOS transistors for wireless infrastructure.

The MRF7S15100HR3 belongs to Freescale's MRF7S family of laterally diffused MOSFETs, engineered specifically for high-efficiency, high-linearity cellular base station amplifiers operating in licensed sub-2 GHz bands.

FAQ

What is the maximum continuous drain voltage rating for the MRF7S15100HR3?

The MRF7S15100HR3 has a maximum drain-source voltage (VDSS) rating of +65 Vdc, with a minimum of −0.5 Vdc. However, its recommended operating voltage (VDD) is 32 Vdc, and it is characterized for ruggedness at that level-including 10:1 VSWR survival at 32 Vdc and 100 W CW output. Exceeding 32 Vdc in normal operation voids guaranteed performance per the datasheet.

Does the MRF7S15100HR3 require external matching components for 1490 MHz operation?

No, the MRF7S15100HR3 is internally matched for 50 Ω operation across 1470–1510 MHz, eliminating the need for external input/output matching networks in standard reference designs. The datasheet provides verified Zsource and Zload impedances (e.g., 2.62 − j4.97 Ω and 3.45 − j3.65 Ω at 1490 MHz) for fine-tuning, but functional operation is achieved without them.

What thermal management is required for the MRF7S15100HR3 at full 23 W average power?

At 23 W average output with 32% drain efficiency, the MRF7S15100HR3 dissipates approximately 49 W as heat. With RθJC = 0.65°C/W, maintaining case temperature ≤ 80°C requires a heatsink with RθCA ≤ 0.85°C/W. The NI-780 package must be mounted with thermal interface material to a grounded copper plane or dedicated heatsink, and flange screw torque must follow Freescale specification (typically 10–12 in-lb).

Is the MRF7S15100HR3 suitable for Doherty amplifier topologies?

Yes, the MRF7S15100HR3 is explicitly optimized for Doherty applications, featuring a wider negative gate-source voltage range (down to −6 V) for improved peaking device control, verified IMD symmetry (40 MHz), and broadband gain flatness (0.2 dB over 40 MHz). Its internal matching and ruggedness simplify carrier/peaking device pairing in asymmetrical Doherty architectures.

What does the "R3" suffix indicate in MRF7S15100HR3?

"R3" denotes the packaging format: tape-and-reel with 250 units per 56 mm wide, 13-inch reel. This is the standard SMT-compatible packaging for the MRF7S15100HR3, aligned with IPC-7351 guidelines and compatible with high-speed pick-and-place equipment. The alternative HSR3 variant uses the same die but in the NI-780S (Case 465A-06) package.