NXP Semiconductors MRF5S9080NBR1

Overview

MRF5S9080NBR1 from Freescale Semiconductor is an N-channel enhancement-mode lateral RF power MOSFET designed for GSM and GSM EDGE base station amplifiers operating at 869–960 MHz. It delivers 80 W CW output at 26 V, achieves 18.5 dB power gain and 60% drain efficiency in GSM mode, and supports 36 W average output with 2.5% rms EVM in EDGE modulation.

For engineers reviewing the MRF5S9080NBR1 datasheet, MRF5S9080NBR1 pinout, MRF5S9080NBR1 application, or MRF5S9080NBR1 equivalent, key selection criteria include its 200°C junction rating, TO-270 WB-4 plastic package with exposed heat slug, internal input matching, and verified 10:1 VSWR tolerance at 960 MHz under full-power conditions.

Technical Context

This device employs a laterally diffused MOS structure optimized for high-efficiency RF power amplification in cellular infrastructure. Its internally matched input eliminates external tuning components at 900 MHz, while the series-equivalent large-signal impedance data (e.g., Z_source = 1.89 − j1.14 Ω at 960 MHz) enables precise output network design.

The MRF5S9080NBR1 operates with fixed DC biasing (V_DD = 26 V, I_DQ = 600 mA for GSM, 550 mA for EDGE), supports Class AB operation, and integrates ESD protection rated to HBM Class 1B, MM Class A, and CDM Class IV per JEDEC standards.

Key Specifications

Pinout & Package

Package: TO-270 WB-4 (Case 1486-03), plastic with exposed copper heat slug for direct thermal interface. Dimensions: 18.29 mm × 14.20 mm × 4.32 mm (L×W×H), 5-terminal configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF5S9080NR1, the MRF5S9080NBR1 trades 0.04°C/W higher thermal resistance for improved manufacturability in TO-270 WB-4 tape-and-reel format; versus PD55008-E, it offers superior EVM (2.5% vs. 3.0% rms) and tighter spectral regrowth (−63 dBc vs. −65 dBc), critical for EDGE spectral mask compliance.

Availability

MRF5S9080NBR1 is available at Aetrix Electronics and suitable for GSM base station transmitters, EDGE multicarrier amplifiers, and TDMA infrastructure systems requiring stable component supply across extended production lifecycles.

Supply support for MRF5S9080NBR1 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 for wireless infrastructure, automotive radar, and industrial heating applications.

The MRF5S9080NBR1 belongs to Freescale's MRF5S family of laterally diffused MOSFETs engineered specifically for high-efficiency, high-reliability cellular base station PAs operating in 800–1000 MHz bands.

FAQ

What is the maximum drain-source voltage rating for the MRF5S9080NBR1?

The MRF5S9080NBR1 has a maximum drain-source voltage (V_DSS) rating of +65 Vdc and −0.5 Vdc. This rating defines the absolute limit for safe DC biasing and transient voltage tolerance during operation. Exceeding +65 Vdc risks catastrophic breakdown. The MRF5S9080NBR1 is qualified for continuous operation up to 32 V_DD, making 26 V the standard nominal supply for GSM/EDGE applications.

Does the MRF5S9080NBR1 require external input matching components?

No, the MRF5S9080NBR1 is internally matched for 50 Ω systems across the 869–960 MHz band. Freescale's characterization confirms input return loss of −15 dB typical at 960 MHz under 80 W CW conditions. External matching is only needed for narrowband optimization or harmonic suppression; the MRF5S9080NBR1's integrated matching reduces bill-of-materials count and simplifies PCB layout.

What is the thermal resistance from junction to case for the MRF5S9080NBR1?

The MRF5S9080NBR1 has a thermal resistance (R_θJC) of 0.54°C/W when operating at 36 W CW with case temperature maintained at 80°C. This value is measured per AN1955 methodology and reflects real-world thermal performance under EDGE modulation conditions. For GSM CW operation at 80 W and 79°C case temperature, R_θJC is 0.50°C/W - both values are specified in the official Freescale datasheet for the MRF5S9080NBR1.

Can the MRF5S9080NBR1 be used in CDMA applications?

Yes, the MRF5S9080NBR1 is explicitly characterized for CDMA applications per its Freescale datasheet. It delivers 36 W average output with 42% drain efficiency and meets ACPR requirements when biased at V_DD = 26 V and I_DQ = 550 mA. Its broadband gain flatness and low spectral regrowth (−77 dBc at 600 kHz offset) make the MRF5S9080NBR1 suitable for CDMA forward-link amplification in repeaters and microcells.

What ESD protection level does the MRF5S9080NBR1 provide?

The MRF5S9080NBR1 provides integrated ESD protection rated to Human Body Model (HBM) Class 1B (≥500 V), Machine Model (MM) Class A (≥200 V), and Charge Device Model (CDM) Class IV (≥1000 V) per JESD22 standards. This level of on-die protection allows safe handling during board assembly without requiring external ESD diodes, and is validated in Freescale's qualification testing for the MRF5S9080NBR1.