NXP Semiconductors BLF6G27LS-75,112

Overview

BLF6G27LS-75 from NXP Semiconductors is a 75 W LDMOS power transistor designed for RF power amplification in base station applications operating between 2500 MHz and 2700 MHz. It delivers 9 W average output power, 17 dB power gain, and 23 % drain efficiency at 28 V supply and 600 mA quiescent drain current under single-carrier N-CDMA conditions. Its internally matched design supports WiMAX and IS-95 systems with rugged 10:1 VSWR tolerance.

For engineers reviewing the BLF6G27LS-75 datasheet, BLF6G27LS-75 pinout, BLF6G27LS-75 application, or BLF6G27LS-75 equivalent, key selection criteria include its 2.5–2.7 GHz broadband operation, −50 dBc ACPR885k (30 kHz BW), 0.75 K/W junction-to-case thermal resistance, SOT502B earless flanged ceramic package, and verified performance in multicarrier W-CDMA and 2-carrier configurations.

Technical Context

The BLF6G27LS-75 operates in class-AB mode with fixed 28 V drain supply and 600 mA IDq bias, optimized for high-efficiency linear amplification of wideband modulated signals including IS-95, W-CDMA, and WiMAX. Its LDMOS structure provides inherent ruggedness against load mismatch and thermal runaway.

It achieves −50 dBc adjacent channel power ratio at 885 kHz offset and −60 dBc at 1980 kHz under 9 W average output, measured within 30 kHz bandwidth. The device features integrated ESD protection, gate-source threshold voltage of 1.4–2.4 V, and drain-source on-resistance of 0.14–0.25 Ω at specified test conditions.

Key Specifications

Pinout & Package

SOT502B is an earless flanged LDMOST ceramic package with two leads and direct flange connection to ground. The flange serves as the primary thermal and RF ground path, eliminating need for separate source bonding wire.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BLF6G27-75, the BLF6G27LS-75 offers lower thermal resistance for improved power density in space-constrained macrocell modules; compared with MRF6VP2750HR5, it avoids GaN-specific gate control complexity while maintaining proven reliability in deployed IS-95/WiMAX networks.

Availability

BLF6G27LS-75 is available at Aetrix Electronics and suitable for WiMAX base station PA, IS-95 cellular infrastructure, and W-CDMA macrocell amplifier designs requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.

Supply support for BLF6G27LS-75 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 BLF6G27LS-75 belongs to NXP's high-power LDMOS transistor family engineered specifically for broadband RF infrastructure applications in 2.5–2.7 GHz licensed spectrum bands used by WiMAX, LTE-TDD, and CDMA2000 systems.

FAQ

What is the maximum peak output power rating for BLF6G27LS-75?

The BLF6G27LS-75 has a maximum peak output power (PL(M)) of 75 W, verified under class-AB operation at 28 V drain supply, 600 mA IDq, and 2500–2700 MHz frequency range. This rating applies to continuous wave (CW) and modulated signal conditions with proper thermal management and VSWR ≤ 10:1.

Does BLF6G27LS-75 require external gate bias circuitry?

Yes, BLF6G27LS-75 requires an external gate bias network to set IDq = 600 mA at VDS = 28 V. The gate-source threshold voltage ranges from 1.4 V to 2.4 V, and stable DC bias must be applied through resistive or active regulation to ensure consistent gain and efficiency across temperature.

How does BLF6G27LS-75 differ from BLF6G27-75 in thermal performance?

The BLF6G27LS-75 has a junction-to-case thermal resistance (Rth(j-case)) of 0.75 K/W, which is 0.10 K/W lower than the BLF6G27-75 (0.85 K/W). This improvement enables higher sustained output power or reduced heatsink size in thermally constrained macrocell amplifier modules.

Is BLF6G27LS-75 suitable for 2-carrier W-CDMA operation?

Yes, BLF6G27LS-75 is characterized for 2-carrier W-CDMA with 10 MHz carrier spacing at 2500–2700 MHz. It maintains −40 dBc ACPR5M and −40 dBc ACPR10M at 9 W average output, supporting repeater and distributed antenna system (DAS) applications requiring dual-channel linearity.

What is the recommended PCB material for BLF6G27LS-75 evaluation?

The official NXP test circuit uses Taconic RF35 substrate (εr = 3.5, thickness = 0.762 mm) for BLF6G27LS-75 evaluation. This material ensures controlled impedance matching and minimizes dielectric losses at 2.5–2.7 GHz, directly supporting the published ZS and ZL impedance values in Table 8.