NXP Semiconductors MRF21030LR3

Overview

MRF21030LR3 from NXP Semiconductors (formerly Freescale) is a lateral N-channel enhancement-mode RF power MOSFET designed for Class AB broadband amplifier stages in 2110–2170 MHz PCN/PCS/WLL base station transmitters. It delivers 30 W PEP output power at 28 Vdc, achieves 13 dB two-tone power gain, and maintains –30 dBc third-order IMD under 250 mA quiescent drain current - enabling multicarrier CDMA and LTE-adjacent applications.

For engineers reviewing the MRF21030LR3 datasheet, MRF21030LR3 pinout, MRF21030LR3 application, or MRF21030LR3 equivalent, this device is selected for high-linearity, high-efficiency RF final-stage amplification where VSWR tolerance up to 10:1, thermal stability at TC = 150°C, and integrated ESD protection (HBM Class 2, MM Class M3) are critical design requirements.

Technical Context

The MRF21030LR3 operates as a fully matched, internally tuned RF power transistor with input and output matching networks embedded in its NI-400 package. Its lateral MOSFET architecture enables wideband performance across 2110–2170 MHz while maintaining stable gain flatness and phase linearity - essential for multicarrier signal integrity in base station PA modules.

It is characterized using series-equivalent large-signal impedance parameters (e.g., Z_source = 14.3 − j8.8 Ω at 2140 MHz; Z_load = 3.4 − j0.37 Ω), optimized for 25 Ω test fixtures. Thermal resistance R_θJC = 2.1 °C/W supports high-power CW operation with case temperature limited to 150°C and junction temperature up to 200°C.

Key Specifications

Pinout & Package

Package: NI-400 (Case 465E-04, Style 1), hermetically sealed ceramic/metal flange-mount package with integral input/output matching network. Dimensions: 20.4 × 10.3 × 4.1 mm (L×W×H), flange-mounted for optimal thermal conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF21030LSR3, the MRF21030LR3 offers identical RF performance but requires no PCB rework for legacy NI-400 layouts; versus PD57018-E, it trades off 5 W output headroom for guaranteed matching and faster time-to-market in standardized base station modules.

Availability

MRF21030LR3 is available at Aetrix Electronics and suitable for macrocell base stations, wireless local loop systems, FM STL links, and TDMA repeaters requiring stable component supply, long-term lifecycle support, and RoHS-compliant RF power devices.

Supply support for MRF21030LR3 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 acquired Freescale Semiconductor in 2015 and continues to support its RF power portfolio for telecom infrastructure. NXP is a global leader in secure connectivity solutions for automotive, industrial, and communications markets.

The MRF21030LR3 belongs to NXP's legacy RF Power Lateral MOSFET product line, engineered specifically for high-linearity, high-efficiency final-stage amplification in 2–2.2 GHz cellular infrastructure equipment.

FAQ

What is the maximum junction temperature rating for the MRF21030LR3?

The MRF21030LR3 has a maximum operating junction temperature (T_J) of 200°C, as specified in Table 1 of the official datasheet. This rating enables reliable operation under high ambient and power-dissipation conditions typical in outdoor base station enclosures. Thermal design must ensure that actual junction temperature remains below this limit using the measured R_θJC = 2.1 °C/W and appropriate heatsinking. The MRF21030LR3 must be operated within this absolute maximum to avoid permanent degradation.

Does the MRF21030LR3 require external input and output matching components?

No, the MRF21030LR3 is internally matched for both input and output across its operating band (2110–2170 MHz), as confirmed in the "Functional Tests" section and Figure 9 of the datasheet. Its NI-400 package integrates matching capacitors and microstrip elements, allowing direct 50 Ω system connection without discrete matching networks. This eliminates tuning complexity and improves repeatability in high-volume base station PA manufacturing. The MRF21030LR3 is therefore optimized for rapid integration into standardized RF front-end designs.

What is the gate threshold voltage range for the MRF21030LR3?

The gate threshold voltage (V_GS(th)) for the MRF21030LR3 is specified as 2–4 Vdc (typical 3 Vdc) at V_DS = 10 Vdc and I_D = 100 μAdc, per Table 4 in the datasheet. This range defines the minimum gate voltage required to initiate conduction and informs bias network design for Class AB operation. The MRF21030LR3's V_GS(Q) of 2–4.5 Vdc at I_DQ = 250 mA further validates stable quiescent point control under typical base station operating conditions.

Is the MRF21030LR3 RoHS compliant and lead-free?

Yes, the MRF21030LR3 is explicitly stated as RoHS compliant in the "Features" section of the datasheet, meeting EU Directive 2011/65/EU. Its construction uses lead-free terminations and compliant materials throughout the NI-400 ceramic/metal package. The "R3" suffix also denotes tape-and-reel packaging (250 units per 32 mm, 13-inch reel), consistent with modern automated SMT assembly requirements. The MRF21030LR3 is suitable for environmentally regulated telecom infrastructure deployments worldwide.

How does the MRF21030LR3 perform in CDMA applications?

The MRF21030LR3 delivers –45 dB ACPR at 4.096 MHz offset under CDMA modulation at 28 Vdc, as documented in the "Wideband CDMA Performance" section. This performance level meets stringent 3GPP spectral mask requirements for PCS band base stations. Combined with its 30 W PEP output and –30 dBc IMD, the MRF21030LR3 supports high-efficiency, low-distortion CDMA carrier aggregation without requiring complex digital predistortion. Its linearity and efficiency make the MRF21030LR3 a proven solution for legacy and hybrid CDMA/LTE infrastructure.