STMicroelectronics PD54003S-E

Overview

PD54003S-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 PD54003S-E datasheet, PD54003S-E pinout, PD54003S-E application, or PD54003S-E equivalent, key selection criteria include RF gain flatness across 480–520 MHz, load mismatch tolerance (20:1 VSWR), gate-source threshold voltage (2.0–5.0 V), and thermal performance in surface-mount RF PCB layouts.

Technical Context

This device operates in common-source configuration with lateral LDMOS architecture, enabling high linearity and stable gain over temperature. Its static characteristics include low gate leakage (≤1 µA) and transconductance of 1.7 mho at 3.2 A drain current, supporting Class AB biasing for efficiency–linearity trade-off in narrowband RF stages.

Dynamic performance is characterized at 7.5 V drain supply and 50 mA IDQ, delivering 50–55% drain efficiency at 3 W POUT. Impedance data shows input impedance ZIN = 1.553 – j1.251 Ω and output impedance ZDL = 2.661 + j0.139 Ω at 500 MHz, facilitating 50 Ω matching network design using microstrip or lumped elements.

Key Specifications

Pinout & Package

PD54003S-E uses the PowerSO-10RF (formed lead) plastic package - a JEDEC-approved, surface-mount RF power package with integrated heatsink pad and gull-wing leads. Dimensions: 9.5 mm × 14.1 mm × 3.5 mm (L × E × A2), with 0.8–1.1 mm lead length (L) and 0.23–0.32 mm lead thickness (c).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF158 and PD55003-E, PD54003S-E offers optimal balance of gain, thermal resistance, and package size for space-constrained 7 V portable radios - delivering 12 dB gain and 1.8 °C/W cooling in the smallest surface-mount RF power footprint among ST's LDMOS family.

Availability

PD54003S-E is available at Aetrix Electronics and suitable for portable radio transmitters, ISM band amplifiers, land-mobile radio base stations, and PMR repeater output stages requiring stable component supply and long-term manufacturing continuity.

Supply support for PD54003S-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 technologies for industrial, automotive, and communications markets.

PD54003S-E belongs to ST's LdmoST plastic RF power transistor product line, engineered specifically for high-linearity, thermally robust amplification in battery-operated and compact wireless infrastructure equipment.

FAQ

What is the maximum safe operating drain voltage for PD54003S-E?

The absolute maximum drain-source voltage (V(BR)DSS) is 25 V at TCASE = 25°C. For reliable operation, ST specifies 9.5 V maximum drain supply under load mismatch conditions. Exceeding 9.5 V risks exceeding safe operating area limits during VSWR stress events, even if below 25 V DC rating.

Can PD54003S-E be used in Class C amplifier configurations?

No - PD54003S-E is characterized and qualified for Class AB operation only. Its gate threshold voltage (2.0–5.0 V) and transconductance profile are optimized for linear biasing at 50 mA IDQ. Class C use would cause excessive distortion, thermal runaway, and potential failure due to lack of linear gain control.

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

Yes - PD54003S-E is supplied in ECOPACK®2-compliant PowerSO-10RF packaging, meeting RoHS Directive 2011/65/EU and IEC 61249-2-21:2011 for halogen-free materials. The package uses lead-free matte tin plating and green molding compound.

How does gate-source voltage affect drain current stability over temperature?

At fixed VGS, ID increases with temperature due to positive temperature coefficient of threshold voltage shift. Figure 5 in the datasheet shows VGS decreases ~2.5 mV/°C from 25°C to 100°C case temperature - requiring active gate bias compensation or resistive divider stabilization to maintain constant IDQ in wide-temperature deployments.