NXP Semiconductors MRF21010LR1

Overview

MRF21010LR1 from Freescale Semiconductor is an N-channel enhancement-mode lateral RF power MOSFET designed for W-CDMA base station amplifiers operating at 2110–2170 MHz. It delivers 10 W PEP output power with 13.5 dB typical two-tone power gain, 35% drain efficiency, and –35 dBc third-order IMD under 28 Vdc bias at 100 mA quiescent current-enabling high-linearity multicarrier amplifier stages in cellular infrastructure.

For engineers reviewing the MRF21010LR1 datasheet, MRF21010LR1 pinout, MRF21010LR1 application, or MRF21010LR1 equivalent, this device is selected for its verified W-CDMA ACPR of –45 dBc at 2140 MHz, 10:1 VSWR ruggedness, integrated ESD protection (HBM Class 1), and thermal resistance of 5.5°C/W-critical parameters for robust macrocell PA design and thermal management validation.

Technical Context

This device operates as a common-source broadband RF amplifier in Class AB configuration, optimized for 2110–2170 MHz frequency band with series-equivalent large-signal impedance characterization provided at 1990/2110/2230 MHz. Its gate threshold voltage (2.5–4.0 Vdc) and transconductance (0.95 S typ.) support stable biasing across temperature for linearized operation.

The MRF21010LR1 uses a lateral MOSFET structure with gold-plated leads (40 µ″ nominal per L suffix), housed in a thermally enhanced NI-360 metal-ceramic package. Its 5.5°C/W junction-to-case thermal resistance enables direct mounting to heatsinks, while the 10:1 VSWR tolerance ensures survivability under mismatched antenna conditions without external protection circuitry.

Key Specifications

Pinout & Package

Package: NI-360 (Case 360B-05), metal-ceramic hermetic, flange-mounted, 3-terminal surface-mountable package with integral heatsink interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF21010LSR1, the MRF21010LR1 offers superior thermal dissipation due to larger NI-360 package, making it preferred for high-duty-cycle macrocell deployments; versus PD57018-E, it provides proven reliability and simpler biasing at lower RF power density, avoiding GaN-specific layout constraints.

Availability

MRF21010LR1 is available at Aetrix Electronics and suitable for W-CDMA base station amplifiers, FM broadcast transmitters, and multicarrier cellular infrastructure requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for MRF21010LR1 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 for wireless infrastructure, emphasizing ruggedness, linearity, and thermal performance in cellular base stations.

The MRF21010LR1 belongs to Freescale's MRF210xx family of lateral MOSFETs engineered specifically for W-CDMA and multicarrier amplifier applications demanding high ACPR, VSWR tolerance, and stable gain across temperature.

FAQ

What is the maximum drain-source voltage rating for the MRF21010LR1?

The MRF21010LR1 has a maximum drain-source voltage (V_DSS) rating of +65 Vdc, with a minimum of –0.5 Vdc. This rating ensures safe operation under transient voltage spikes and switching conditions in Class AB RF amplifier circuits. The MRF21010LR1 is not rated for avalanche operation, so proper clamping and supply regulation must be maintained within this limit.

Does the MRF21010LR1 require external gate protection against ESD?

No-the MRF21010LR1 integrates ESD protection rated to Human Body Model (HBM) Class 1 (≥250 V) and Machine Model (MM) Class M1. While this provides baseline handling robustness, Freescale recommends using series gate resistors and low-capacitance TVS diodes in production systems where repeated hot-plug or high-static environments exist. The MRF21010LR1's internal protection does not replace good PCB-level ESD design practice.

What is the recommended gate bias voltage for linear operation of the MRF21010LR1?

For linear W-CDMA operation, Freescale specifies a gate quiescent voltage (V_GS(Q)) of 2.5–4.5 Vdc at V_DD = 28 Vdc and I_DQ = 100 mA. A typical setting is 4.0 Vdc, which balances gain stability, efficiency, and IMD performance. The MRF21010LR1's gate threshold voltage (2.5–4.0 Vdc) means precise bias control is essential-drift beyond ±0.1 Vdc degrades ACPR by >3 dB.

Can the MRF21010LR1 be used in Class C or switching-mode applications?

No-the MRF21010LR1 is characterized and qualified exclusively for Class AB linear amplification. Its lateral MOSFET structure, thermal design, and linearity optimizations make it unsuitable for saturated Class C or digital switching use. Attempting such operation risks exceeding junction temperature limits and degrading IMD performance irreversibly. The MRF21010LR1 is intended only for analog RF power amplification with defined quiescent current and linear drive.

What is the thermal resistance from junction to case for the MRF21010LR1?

The MRF21010LR1 has a thermal resistance (R_θJC) of 5.5°C/W from junction to case, measured under standard mounting conditions with thermal compound and 25°C ambient. This value assumes full flange contact to a heatsink; incomplete contact or insufficient thermal interface material increases effective R_θJC. At 10 W PEP output, the MRF21010LR1's junction temperature rise is ~55°C above case temperature-requiring case temperature ≤95°C to stay within the 200°C max TJ rating.