NXP Semiconductors A5G21H605W19NR3

Overview

A5G21H605W19NR3 from NXP Semiconductors is an 85 W asymmetrical Doherty RF power GaN amplifier optimized for cellular base station transmitters operating in the 2110–2200 MHz band. It delivers 16.5 dB typical power gain, 57.6% drain efficiency at 2140 MHz, and –27.3 dBc adjacent channel power ratio under W-CDMA modulation. Its ruggedized design withstands high VSWR and supports wide instantaneous bandwidth in macrocell and massive MIMO active antenna units.

For engineers reviewing the A5G21H605W19NR3 datasheet, A5G21H605W19NR3 pinout, A5G21H605W19NR3 application, or A5G21H605W19NR3 equivalent, key selection criteria include guaranteed 2110–2200 MHz band performance, 48 Vdc operation, plastic OM-780-4S4S package thermal resistance of 0.46 °C/W, and GaN-based Doherty architecture supporting 9.9 dB PAR signals.

Technical Context

This device implements a monolithic GaN-on-SiC Doherty architecture with separate carrier and peaking amplifier paths, internally matched for 50 Ω systems. Bias sequencing requires precise gate voltage control: VGSA and VGSB set to –5 V before applying 48 Vdc drain supply, followed by incremental gate bias adjustment to achieve 300 mA quiescent current on the carrier side and target voltage on the peaking side.

It operates as a depletion-mode amplifier requiring negative gate bias, with limiting values including ±16 Vdc gate-source voltage, 125 Vdc drain-source voltage, and maximum channel temperature of 225 °C. Thermal management relies on the exposed backside source terminal acting as the primary thermal path to the heatsink.

Key Specifications

Pinout & Package

The A5G21H605W19NR3 uses the OM-780-4S4S plastic overmolded package with an exposed backside source terminal serving as the primary thermal and electrical ground path. Dimensions are specified in Figure 4–6 of the datasheet; the package is RoHS-compliant and moisture sensitivity level 3 (peak reflow 245 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with QPA2211 and AFGA21090, the A5G21H605W19NR3 provides broader guaranteed frequency coverage (2110–2200 MHz), superior ACPR (–27.3 dBc), and lower thermal resistance (0.46 °C/W), making it optimal for next-generation 5G base stations requiring full-band flexibility and thermal headroom.

Availability

A5G21H605W19NR3 is available at Aetrix Electronics and suitable for macrocell base stations, massive MIMO active antenna units, and private 5G infrastructure requiring stable component supply and long-term lifecycle support.

Supply support for A5G21H605W19NR3 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and communications markets.

The Airfast RF Power product line delivers GaN-based amplifiers engineered specifically for cellular infrastructure, emphasizing broadband efficiency, ruggedness, and thermal performance in macro and small-cell base stations.

FAQ

What is the guaranteed operating frequency range for the A5G21H605W19NR3?

The A5G21H605W19NR3 is characterized and performance-guaranteed exclusively for the 2110–2200 MHz band. Operation outside this range is not supported by NXP's specifications, and no performance data is provided for frequencies below 2110 MHz or above 2200 MHz. The A5G21H605W19NR3 must be deployed within this defined band to meet datasheet specifications for gain, efficiency, and linearity.

Does the A5G21H605W19NR3 require external matching components?

No, the A5G21H605W19NR3 is an internally matched device designed for direct 50 Ω system integration. Its RF input and output ports are pre-matched per the NXP reference circuit, eliminating the need for external impedance-matching networks. However, proper PCB layout - including controlled-impedance traces, grounding, and decoupling per Figure 3 - remains essential to maintain specified performance.

How should the A5G21H605W19NR3 be biased during power-up and power-down sequences?

The A5G21H605W19NR3 requires strict bias sequencing: during power-up, set VGSA and VGSB to –5 V first, then apply 48 Vdc to VDDA and VDDB, then adjust VGSA to achieve 300 mA IDQA, and finally set VGSB to target bias. During power-down, disable RF input, return gates to –5 V, reduce drains to 0 V, then disable gate bias. This sequence prevents gate overvoltage and ensures reliable GaN operation.

What thermal interface requirements apply to the A5G21H605W19NR3 package?

The A5G21H605W19NR3 uses an OM-780-4S4S package with an exposed backside source pad that serves as the primary thermal path. This pad must be soldered directly to a copper heatsink or thermal plane using lead-free solder per AN1907 guidelines. Thermal resistance is specified at 0.46 °C/W (IR measurement), and effective heat dissipation requires full-area solder coverage and minimal interfacial thermal resistance.

Is the A5G21H605W19NR3 suitable for 5G NR applications?

Yes, the A5G21H605W19NR3 is qualified for 5G NR FR1 operation in the n1 band (2110–2200 MHz). Its –27.3 dBc ACPR at 2140 MHz, 9.9 dB PAR handling capability, and 60 MHz instantaneous bandwidth support 5G NR channel bandwidths up to 100 MHz. The A5G21H605W19NR3 has been validated with W-CDMA and AWGN signals representative of 5G uplink/downlink modulation profiles.