NXP Semiconductors MRF19030LSR3

Overview

MRF19030LSR3 from Freescale Semiconductor is an N-channel enhancement-mode lateral RF power MOSFET designed for class AB base station amplifiers operating at 1930–1990 MHz. It delivers 30 W PEP output power at 26 Vdc, achieves 13 dB typical two-tone power gain, and maintains −31 dBc third-order IMD under CDMA conditions. It is internally matched and qualified for PCS/PCN infrastructure applications including multicarrier and TDMA systems.

For engineers reviewing the MRF19030LSR3 datasheet, MRF19030LSR3 pinout, MRF19030LSR3 application, or MRF19030LSR3 equivalent, key selection criteria include its 1930–1990 MHz bandwidth, 30 W PEP capability, 2.1 °C/W thermal resistance, RoHS-compliant NI-400S package, and proven 10:1 VSWR ruggedness at 1960 MHz.

Technical Context

This device employs a laterally diffused MOS structure optimized for high-frequency linearity and thermal stability in broadband RF power stages. Its internal input/output matching network eliminates external tuning components for 50 Ω systems, and it operates with fixed 300 mA quiescent drain current at 26 Vdc supply.

The MRF19030LSR3 is characterized using series-equivalent large-signal impedance parameters (e.g., Z_source = 10.47 − j7.21 Ω at 1960 MHz), enabling accurate load-pull design. Its ESD protection meets HBM Class 2 and MM Class M3 standards, and gate threshold voltage is tightly specified at 2–4 Vdc.

Key Specifications

Pinout & Package

Package: NI-400S (Case 465F-04, Style 1), hermetically sealed ceramic/metal flange-mount package with solderable leads and low-gold-plating (40 μ″ nominal).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF19030LR3, the MRF19030LSR3 provides identical electrical performance in a dimensionally distinct NI-400S package, while the PD57018-E trades internal matching for broader bandwidth and improved linearity-requiring additional design effort but enabling higher spectral efficiency in next-gen systems.

Availability

MRF19030LSR3 is available at Aetrix Electronics and suitable for PCS base station transmitters, CDMA multicarrier amplifiers, TDMA infrastructure repeaters, and FM STL links requiring stable component supply and long-lifecycle support.

Supply support for MRF19030LSR3 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 high-performance RF power transistors for wireless infrastructure, emphasizing ruggedness, linearity, and thermal reliability.

The MRF19030LSR3 belongs to Freescale's MRF190xx RF power MOSFET family, engineered specifically for class AB operation in 1800–2000 MHz base station amplifiers where VSWR tolerance and CDMA spectral purity are critical.

FAQ

What is the maximum operating junction temperature for the MRF19030LSR3?

The MRF19030LSR3 has a maximum operating junction temperature (T_J) of 200°C, as specified in Table 1 of the Freescale technical data. This rating enables reliable operation under high ambient conditions when mounted on a properly sized heatsink with thermal resistance ≤2.1 °C/W. The MRF19030LSR3 must be operated within this limit to avoid permanent degradation of RF performance or gate oxide integrity.

Does the MRF19030LSR3 require external matching components for 50 Ω systems?

No, the MRF19030LSR3 is internally matched for both input and output at 1930–1990 MHz, as confirmed in the "Features" section and Figure 9 source/load impedance data. The device achieves −13 dB input return loss and delivers full 30 W PEP into a 50 Ω load without external tuning capacitors or inductors-reducing bill-of-materials and simplifying layout for the MRF19030LSR3 in production base station PA modules.

What is the gate threshold voltage range for the MRF19030LSR3?

The gate threshold voltage (V_GS(th)) for the MRF19030LSR3 is specified as 2–4 Vdc (min–max) at V_DS = 10 Vdc and I_D = 100 μAdc, per Table 4. This tight distribution ensures consistent turn-on behavior across production lots and supports stable 300 mA quiescent current setting using standard bias networks. The MRF19030LSR3's V_GS(Q) is further characterized at 2–4.5 Vdc under operating conditions.

Can the MRF19030LSR3 withstand antenna VSWR mismatches in deployed systems?

Yes, the MRF19030LSR3 is explicitly characterized to handle 10:1 VSWR at 1960 MHz and 30 W CW output power without damage or parametric shift. This ruggedness is validated per Freescale's test methodology and makes the MRF19030LSR3 suitable for unattended outdoor macrocell installations where antenna detuning or cable faults may occur. No external circulator or protection circuit is required solely for VSWR survival.

What is the thermal resistance from junction to case for the MRF19030LSR3?

The thermal resistance from junction to case (R_θJC) for the MRF19030LSR3 is 2.1 °C/W, as published in Table 2. This value applies to the NI-400S package (Case 465F-04) and assumes proper mounting with thermal interface material and sufficient heatsink mass. It enables calculation of junction temperature rise (ΔT_J = P_D × 2.1) to ensure the MRF19030LSR3 remains within its 200°C T_J limit under full 30 W PEP operation.