STMicroelectronics PD54008S-E

Overview

PD54008S-E from STMicroelectronics is an N-channel enhancement-mode lateral MOSFET RF power transistor in common-source configuration, designed for broadband commercial and industrial RF amplification up to 1 GHz. It delivers 8 W output power with 11.5 dB gain at 500 MHz under 7.5 V drain bias and 150 mA quiescent current, housed in the JEDEC-approved PowerSO-10RF (straight-lead) plastic package. Its superior linearity and thermal stability make it ideal for portable radio transmitters.

For engineers reviewing the PD54008S-E datasheet, PD54008S-E pinout, PD54008S-E application, or PD54008S-E equivalent, key selection criteria include its 73 W power dissipation capability, 1.2 °C/W junction-to-case thermal resistance, 25 V drain-source breakdown voltage, 5 A continuous drain current rating, and verified S-parameter performance across 50–1500 MHz at multiple bias points.

Technical Context

This device operates in common-source mode with gate-controlled enhancement-mode conduction, optimized for high-gain, broadband RF amplification from 50 MHz to 1 GHz. Its LDMOS structure provides robust ruggedness against load mismatch (20:1 VSWR tolerance) and stable operation under varying temperature and bias conditions.

The PowerSO-10RF straight-lead package enables surface-mount assembly while maintaining low-inductance source grounding and controlled impedance paths-critical for RF stability. Thermal design leverages the 1.2 °C/W R_thJC and 165 °C maximum junction temperature to sustain high-efficiency operation at 7.5 V drain supply.

Key Specifications

Pinout & Package

PD54008S-E uses the PowerSO-10RF (straight-lead) package-a JEDEC-qualified, high-power SMD RF package with optimized leadframe geometry for low parasitic inductance and repeatable solder joint integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PD54008-E and MRF6P20100HR5, PD54008S-E offers identical RF performance with straight-lead compatibility for automated SMT lines, lower gate drive complexity than GaN alternatives, and proven ruggedness in portable radio environments where cost, size, and thermal simplicity are prioritized over raw power scaling.

Availability

PD54008S-E is available at Aetrix Electronics and suitable for portable radio transmitters, UHF land mobile radio base stations, and ISM-band industrial transmitters requiring stable component supply with consistent RF performance and JEDEC-compliant packaging.

Supply support for PD54008S-E 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in analog, power, and RF solutions for industrial, automotive, and communications markets.

PD54008S-E belongs to ST's LdmoST plastic family of RF power transistors-designed specifically for high-efficiency, broadband amplification in cost-sensitive commercial and industrial wireless infrastructure where thermal robustness and manufacturing scalability are critical.

FAQ

What is the recommended gate bias network for PD54008S-E in Class AB operation?

For stable 150 mA quiescent current at 7.5 V drain supply, ST specifies a 1.5 kΩ series gate resistor and 100 pF RF bypass capacitor to ground, as shown in Figure 25. This network prevents oscillation while enabling precise DC bias control and RF input coupling. External gate voltage must be set to ~2.5 V to achieve target IDQ, verified using the VGS(Q) curve in Figure 5.

Can PD54008S-E operate reliably at 9.5 V drain voltage?

Yes-absolute maximum V(BR)DSS is 25 V, and Figure 12 shows POUT increases to ~12 W at 9.5 V with 150 mA IDQ. However, drain efficiency drops to ~40% and thermal load rises significantly; RthJC remains 1.2 °C/W, so case temperature must stay ≤65 °C to avoid exceeding 165 °C junction limit. Derating curves in Figure 13 confirm safe operation within this constraint.

How does the straight-lead PowerSO-10RF package differ electrically from the formed-lead version?

Electrical performance is identical-the die and internal interconnects are unchanged. The straight-lead variant reduces lead inductance by ~0.1 nH per pin and improves coplanarity (≤0.1 mm vs. ≤0.15 mm), enhancing RF stability and solder joint yield in high-volume SMT lines. Mechanical dimensions differ only in lead form (Table 17 vs. Table 18), not pad layout or thermal pad area.

Is PD54008S-E suitable for pulsed RF applications such as radar modulators?

No-it is optimized for continuous-wave and high-duty-cycle applications (e.g., FM, digital voice). Its 5 A ID rating and 73 W PDISS assume DC or near-DC thermal conditions. Pulse operation requires peak current and thermal transient analysis beyond datasheet limits; ST does not characterize SOA for pulse widths <100 µs or duty cycles <10%, and no pulse-rated derating curves are provided.