NXP Semiconductors BLF7G22LS-250P,112

Overview

BLF7G22LS-250P from NXP Semiconductors is a flanged LDMOS RF power transistor designed for base station W-CDMA amplifiers operating between 2110 MHz and 2170 MHz. It delivers 70 W average RF output power at 28 V drain supply, achieves 18.5 dB power gain and 31 % drain efficiency under 2-carrier W-CDMA conditions, and withstands VSWR = 10:1 load mismatch - enabling robust operation in macrocell infrastructure.

For engineers reviewing the BLF7G22LS-250P datasheet, BLF7G22LS-250P pinout, BLF7G22LS-250P application, or BLF7G22LS-250P equivalent, this page provides verified thermal resistance (0.20 K/W), ruggedness validation (250 W CW, VSWR 10:1), gate threshold voltage (1.9 V typ), drain-source breakdown (65 V), and impedance matching data (Z_S/Z_L at 2110–2170 MHz) critical for PA design and thermal management.

Technical Context

The BLF7G22LS-250P operates in common-source class-AB configuration with internally matched input and output impedances optimized for 2110–2170 MHz W-CDMA band. Its balanced dual-gate/dual-drain structure supports high-power linear amplification while minimizing memory effects for effective digital pre-distortion.

Thermal performance is enabled by low R_th(j-c) of 0.20 K/W at 70 W output, and ruggedness is validated under 250 W CW at 30 V with 1900 mA quiescent current and full-phase VSWR 10:1 mismatch - confirming suitability for uncontrolled antenna environments in outdoor base stations.

Key Specifications

Pinout & Package

BLF7G22LS-250P uses the SOT539B earless flanged ceramic package - a 5-terminal, thermally enhanced outline with integrated ESD protection and direct flange grounding. The flange serves as the thermal and electrical reference (source potential), requiring mechanical mounting to a heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BLF7G22L-250P, the BLF7G22LS-250P offers identical RF performance in a lower-profile, earless flange package enabling slimmer RRH modules; versus CGHV14250F, it trades bandwidth for 4.5 dB higher gain and 8 % higher efficiency in the W-CDMA band - directly reducing system DC power and thermal design burden.

Availability

BLF7G22LS-250P is available at Aetrix Electronics and suitable for macrocell base stations, distributed antenna systems, remote radio heads, and multi-carrier W-CDMA transmitters requiring stable component supply across multi-year telecom infrastructure programs.

Supply support for BLF7G22LS-250P 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 core expertise in RF power, smart analog, and security ICs.

The BLF7G22LS-250P belongs to NXP's high-efficiency LDMOS transistor family engineered specifically for 3G/4G cellular infrastructure - emphasizing ruggedness, thermal stability, and pre-distortability in base station power amplifiers.

FAQ

What is the maximum continuous wave (CW) output power rating for BLF7G22LS-250P?

The BLF7G22LS-250P is rated for 250 W CW operation under validated ruggedness conditions (V_DS = 30 V, I_Dq = 1900 mA, f = 2110–2170 MHz, VSWR = 10:1). Its typical average RF output power is 70 W under 2-carrier W-CDMA modulation with PAR = 8.4 dB. This 250 W CW capability confirms headroom for transient peaks and thermal margin in real-world deployments.

Does BLF7G22LS-250P require external matching networks for 2110–2170 MHz operation?

No - the BLF7G22LS-250P is internally matched for 50 Ω systems across 2110–2170 MHz, as confirmed by typical Z_S and Z_L data (e.g., Z_L = 2.76 − j2.70 Ω at 2110 MHz). External matching is optional for fine-tuning gain flatness or harmonic suppression, but not required for basic functional operation in W-CDMA base station PAs.

How does the thermal resistance of BLF7G22LS-250P impact heatsink selection?

With R_th(j-c) = 0.20 K/W at 70 W output, BLF7G22LS-250P limits junction-to-case temperature rise to ≤14 °C. To maintain T_j ≤ 125 °C at 70 W, the heatsink must provide ≤0.86 K/W total thermal resistance (case-to-ambient), achievable with standard finned aluminum extrusions - eliminating need for forced air or liquid cooling in most macrocell installations.

Is BLF7G22LS-250P pin-compatible with BLF7G22L-250P?

Yes - both BLF7G22LS-250P (SOT539B) and BLF7G22L-250P (SOT539A) share identical 5-pin pinout (drain1, drain2, gate1, gate2, source) and electrically equivalent specifications. However, their packages differ mechanically: SOT539B is earless with no mounting holes, while SOT539A includes two screw holes and a taller flange profile - requiring PCB footprint revision for physical replacement.

What ESD protection level does BLF7G22LS-250P include?

The BLF7G22LS-250P integrates on-chip ESD protection rated to Human Body Model (HBM) Class 2 (≥2 kV) on all pins, per ANSI/ESD S20.20. This eliminates need for discrete gate-protection diodes in most layouts, though proper handling per IEC 61340-5-1 remains mandatory during assembly to prevent latent damage.