NXP Semiconductors MMRF1312HR5

Overview

MMRF1312HR5 from NXP (formerly Freescale) is a high-ruggedness, 52 V, L-band RF power LDMOS transistor optimized for pulse radar applications from 900–1215 MHz. It delivers up to 1615 W peak output power at 900 MHz with 15.2 dB power gain and 54% drain efficiency under 128 µs / 10% duty cycle conditions, and is internally matched for broadband operation in push-pull or quadrature configurations. It serves as the final-stage amplifier in military and commercial L-band radar transmitters.

For engineers reviewing the MMRF1312HR5 datasheet, MMRF1312HR5 pinout, MMRF1312HR5 application, or MMRF1312HR5 equivalent, this page provides verified electrical specifications, ruggedness validation at >20:1 VSWR, thermal impedance (0.017 °C/W), ESD protection class ratings, and functional test data from the 1030 MHz narrowband production fixture - all critical for high-reliability radar PA design and qualification.

Technical Context

This device is a dual-gate, dual-drain N-channel enhancement-mode lateral MOSFET fabricated on silicon LDMOS technology. Its symmetrical A/B channel architecture supports balanced push-pull operation with gate threshold voltage of 1.3–2.3 V and drain-source breakdown voltage rated at 112 Vdc. The integrated ESD protection meets HBM Class 2 (2500 V), MM Class B (250 V), and CDM Class IV (2000 V).

Thermal performance is characterized under pulsed conditions: junction-to-case thermal impedance is 0.017 °C/W at 1000 W peak, 128 µs pulse width, 10% duty cycle, and case temperature of 64 °C. Functional testing confirms 18.5–22.0 dB power gain and 55.5–59.7% drain efficiency at 1030 MHz with 100 mA quiescent current per side.

Key Specifications

Pinout & Package

The MMRF1312HR5 is housed in the NI-1230H-4S package: an eared ceramic/metal air-cavity package with solderable baseplate (source terminal), designed for high-power RF thermal management and mechanical stability. Pin 1 = Gate A, Pin 2 = Gate B, Pin 3 = Drain A, Pin 4 = Drain B. Backside metallization is electrically connected to source.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMRF1312HR5, MMRF1310HR5 offers identical footprint and ruggedness but reduced peak power, while MMRF1050HR5 shifts operational focus to higher frequencies with trade-offs in low-end bandwidth and thermal performance - neither is pin-compatible nor functionally substitutable without circuit redesign.

Availability

MMRF1312HR5 is available at Aetrix Electronics and suitable for L-band radar transmitter modules, military avionics subsystems, and ground-based ATC infrastructure requiring stable component supply and long-term obsolescence management.

Supply support for MMRF1312HR5 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 is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communications markets, with deep heritage in RF power from its Freescale acquisition.

The MMRF1312HR5 belongs to the AIRFAST® RF Power LDMOS family, engineered specifically for high-reliability, high-ruggedness pulsed radar amplifiers operating in demanding military and civil aviation environments.

FAQ

What is the maximum drain supply voltage for MMRF1312HR5?

The MMRF1312HR5 is rated for a maximum drain-source voltage (V_DSS) of +112 Vdc and is qualified for continuous operation up to 52 Vdc drain supply. Exceeding 52 Vdc in functional operation voids qualification compliance, though the absolute breakdown rating supports transient margin. Always reference the 52 Vdc limit in system-level PA design for MMRF1312HR5.

Does MMRF1312HR5 require external gate protection diodes?

No - MMRF1312HR5 integrates ESD protection meeting HBM Class 2 (2500 V), MM Class B (250 V), and CDM Class IV (2000 V) standards, eliminating the need for external gate protection in standard Class C pulsed operation. This integration reduces parasitic capacitance and improves RF stability, as confirmed in Freescale's AN1908 reflow and handling guidelines for MMRF1312HR5.

What is the thermal impedance of MMRF1312HR5 under pulsed conditions?

The junction-to-case thermal impedance (Z_θJC) of MMRF1312HR5 is 0.017 °C/W, measured under pulsed conditions: 1000 W peak, 128 µs pulse width, 10% duty cycle, case temperature at 64 °C, and V_DD = 50 Vdc. This value is critical for heatsink sizing in radar transmitter modules using MMRF1312HR5 and is validated per AN1955 methodology.

Can MMRF1312HR5 be used in single-ended configuration?

Yes - MMRF1312HR5 supports single-ended, push-pull, and quadrature configurations per its datasheet features. In single-ended mode, only one gate-drain pair (e.g., Gate A/Drain A) is actively biased, while the other side is terminated. However, full-rated peak power and optimal ruggedness are achieved only in balanced configurations, as verified in the 1030 MHz narrowband test fixture for MMRF1312HR5.

What package type does MMRF1312HR5 use and how is the source terminal accessed?

MMRF1312HR5 uses the NI-1230H-4S package: an eared ceramic/metal air-cavity package with a solderable copper baseplate. The source terminal is the entire backside metallization - no separate source pin exists. Proper thermal mounting to a heatsink is mandatory, and the baseplate must be electrically tied to system ground to complete the source path for MMRF1312HR5.