STMicroelectronics PD54003-E

Overview

PD54003-E from STMicroelectronics is an N-channel enhancement-mode lateral MOSFET RF power transistor in PowerSO-10RF (formed lead) package, designed for common-source broadband amplification up to 1 GHz. It delivers 3 W output power with 12 dB gain at 500 MHz under 7 V supply and 50 mA quiescent drain current, featuring 1.8 °C/W junction-to-case thermal resistance and 25 V drain-source breakdown voltage - optimized for portable radio transmitters.

For engineers reviewing the PD54003-E datasheet, PD54003-E pinout, PD54003-E application, or PD54003-E equivalent, key selection criteria include RF gain flatness across 480–1000 MHz, load mismatch tolerance (20:1 VSWR), thermal stability at 165 °C max junction temperature, and compatibility with surface-mount assembly using PowerSO-10RF's gull-wing leads.

Technical Context

This device operates in common-source configuration with gate-controlled enhancement-mode conduction, leveraging ST's LDMOS technology for high linearity and reliability. Its static characteristics include 2.0–5.0 V gate threshold voltage and 1.3 V on-resistance at 1 A drain current, while dynamic performance is defined by 59 pF input capacitance (C_iss) and 43 pF output capacitance (C_oss) at 7.5 V V_DS.

The PowerSO-10RF package integrates thermal and RF optimization: a low-inductance source connection, exposed drain pad for heatsinking, and controlled impedance layout support. S-parameter data confirms stable small-signal gain (S₂₁ = 10.26 dB @ 50 MHz, 0.47 dB @ 500 MHz) and return loss (S₁₁ = –173° phase @ 500 MHz) across its operating band.

Key Specifications

Pinout & Package

PD54003-E uses the PowerSO-10RF (formed lead) plastic package - a JEDEC-approved, surface-mount RF power package with gull-wing leads, exposed drain pad for thermal management, and optimized leadframe inductance. Dimensions: 9.5 mm × 14.1 mm × 3.5 mm (L × E × A2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF300AN and PD57003-E, PD54003-E offers optimal balance of 7 V operation, compact SMD footprint, and proven thermal reliability for battery-powered portable radios - whereas alternatives trade off voltage compatibility, board space, or design simplicity.

Availability

PD54003-E is available at Aetrix Electronics and suitable for portable FM transceivers, land mobile radio repeaters, ISM-band industrial transmitters, and amateur radio exciters requiring stable component supply with full production status since 2012.

Supply support for PD54003-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, specializing in power management, analog, MEMS, and microcontrollers - with over 40 years of RF power transistor innovation.

PD54003-E belongs to ST's LdmoST plastic family, engineered specifically for cost-sensitive, high-volume commercial RF power applications demanding surface-mount manufacturability and thermal robustness in portable equipment.

FAQ

What is the recommended gate bias voltage for linear operation?

The datasheet specifies V_GS(Q) = 2.0–5.0 V at I_D = 50 mA and V_DS = 10 V. For linear Class AB operation at 7.5 V supply, a fixed gate bias of 3.5 V via resistive divider or active bias circuit ensures stable 50 mA quiescent current and minimizes gain compression.

Can PD54003-E be used at 900 MHz with 3 W output?

Yes - typical performance data shows P_OUT = 2.2 W and G_PS = 8 dB at 900 MHz (V_DD = 7.5 V, I_DQ = 50 mA). Output power drops predictably with frequency; matching network redesign is required to maintain 3 W, but thermal limits remain valid up to 1 GHz.

Is the PowerSO-10RF package lead-free and RoHS compliant?

Yes - PD54003-E is offered in ECOPACK®-compliant PowerSO-10RF packaging, meeting RoHS Directive 2011/65/EU and REACH SVHC requirements. The "E" suffix denotes lead-free finish, and MSL 3 rating confirms compatibility with standard Pb-free reflow profiles.

How does the 20:1 VSWR tolerance impact PCB layout?

This specification means the device survives worst-case reflected power without degradation when antenna impedance varies widely. Layout must minimize source/drain parasitics: use solid ground plane under drain pad, keep gate trace short and 50 Ω matched, and place DC blocking caps within 2 mm of gate/source terminals.