STMicroelectronics STS2DNF30L

Overview

STS2DNF30L from STMicroelectronics is a dual n-channel enhancement-mode Power MOSFET in SO-8 package, rated for 30 V V_DS, 3 A continuous drain current at T_C = 25°C, and 0.09 Ω R_DS(on) at V_GS = 10 V. It features low gate threshold (1–2.5 V), rugged avalanche capability, and is optimized for high-efficiency DC-DC converters and load switching in industrial power supplies.

For engineers reviewing the STS2DNF30L datasheet, STS2DNF30L pinout, STS2DNF30L application, or STS2DNF30L equivalent, key selection criteria include its dual-channel layout, 0.11 Ω max R_DS(on) at 5 V gate drive, 4.5 nC total gate charge, SO-8 thermal resistance (62.5 °C/W single operation), and integrated source-drain diode with 19 ns reverse recovery time.

Technical Context

This device implements ST's "single feature size" strip-based STripFET™ process, enabling high cell density and uniform channel geometry for consistent on-resistance and improved manufacturing reproducibility. Its dual n-channel configuration shares a common source terminal, supporting half-bridge or synchronous rectifier topologies without external interconnects.

The MOSFET supports standard 4.5 V logic-level gate drive (V_GS(th) typ. 1.7 V) and exhibits low dynamic losses: C_iss = 121 pF, C_oss = 45 pF, and Q_gd = 0.9 nC - critical for high-frequency switching above 500 kHz in compact power stages.

Key Specifications

Pinout & Package

STS2DNF30L is housed in a standard SO-8 surface-mount package (ECOPACK® compliant) with exposed drain pad for enhanced thermal performance. Pin numbering follows JEDEC MS-012AC outline; pins 1–4 and 5–8 form two independent n-channel channels sharing source terminals (pins 4 and 5).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual n-channel power MOSFET applications.

Compared with STP2DNF30L and IRF7341TRPBF, STS2DNF30L uniquely balances 30 V rating, 3 A current, SO-8 mountability, and rugged avalanche performance - making it optimal for compact, thermally constrained 24 V industrial power switches where reliability under transient overload is critical.

Availability

STS2DNF30L is available at Aetrix Electronics and suitable for industrial power supplies, PLC I/O modules, and motor control circuits requiring stable component supply across multi-year production cycles.

Supply support for STS2DNF30L 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The STripFET™ Power MOSFET product line targets high-efficiency, high-reliability power conversion - specifically engineered for DC-DC regulation, motor drives, and load switching where low R_DS(on), fast switching, and avalanche ruggedness are essential.

FAQ

What is the maximum safe operating frequency for STS2DNF30L in a synchronous buck converter?

STS2DNF30L supports reliable operation up to 2 MHz in well-designed synchronous buck converters. Its 4.5 nC total gate charge and 20 ns rise time allow clean switching with minimal overlap loss when driven by a 1 Ω gate resistor and 5 V logic-level signal. Thermal limits (R_thj-a = 62.5 °C/W) constrain practical frequency to ≤1.5 MHz at full 3 A load without airflow.

Does STS2DNF30L require external gate resistors in typical applications?

Yes - external gate resistors are required to control dV/dt and prevent oscillation. A 4.7 Ω resistor is recommended per gate (pins 3 and 6) based on ST's reference test circuit (Figure 13). This value balances switching speed (20 ns rise time) and EMI suppression while avoiding gate ringing caused by PCB trace inductance.

Can STS2DNF30L be used in linear regulator applications?

No - STS2DNF30L is not characterized or qualified for linear-mode operation. Its Safe Operating Area (SOA) curve (Figure 2) shows limited DC capability beyond 1 A at V_DS > 10 V. The device lacks guaranteed SOA in the linear region and may suffer thermal runaway due to positive temperature coefficient of R_DS(on).

How is the common-source configuration implemented in STS2DNF30L's pinout?

Pins 4 and 5 are internally bonded to the same source metallization layer and must be connected to the same PCB net - typically the system power ground or low-side return path. This shared source enables half-bridge configurations where one channel acts as high-side (with bootstrap gate drive) and the other as low-side (ground-referenced), minimizing layout complexity and parasitic inductance.