Diodes Incorporated DMN3018SFG-7

Overview

DMN3018SFG-7 from Diodes Incorporated is a 30V N-channel enhancement-mode MOSFET in PowerDI3333-8 package, delivering 21 mΩ R_DS(ON) at V_GS = 10 V and 35 mΩ at V_GS = 4.5 V, rated for 30 A continuous drain current at T_C = +25°C. It serves as a high-efficiency power switch in DC-DC converters, backlighting drivers, and power management circuits where low conduction loss and fast switching are critical.

For engineers reviewing the DMN3018SFG-7 datasheet, DMN3018SFG-7 pinout, DMN3018SFG-7 application, or DMN3018SFG-7 equivalent, key selection criteria include its 30V V_BR(DSS), thermally optimized PowerDI3333-8 footprint, AEC-Q101 qualification, gate ESD protection, and verified performance under 4.5V logic-level drive.

Technical Context

This MOSFET employs planar trench-gate technology to achieve low R_DS(ON) while maintaining robust avalanche capability (E_AS = 16 mJ) and fast switching (t_D(OFF) = 20.1 ns). Its gate threshold voltage (V_GS(TH) = 1.0–2.1 V) ensures reliable turn-on with standard logic-level signals.

The device integrates an intrinsic body diode with V_SD = 0.5–1.2 V at I_S = 1 A and exhibits low dynamic parameters: C_iss = 697 pF, Q_G = 13.2 nC at 10 V, and Q_GD/Q_GS ratio of ~0.82 - supporting efficient hard-switching operation in synchronous buck topologies.

Key Specifications

Pinout & Package

Package: PowerDI3333-8 - surface-mount, thermally enhanced 8-pin leadframe package with exposed drain paddle; occupies 33% board area vs SO-8; UL 94V-0 rated molding compound; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN3018LFG-7, the DMN3018SFG-7 offers superior board-area efficiency and lower thermal resistance in high-density layouts; versus SI2308DS-T1-GE3, it delivers 6.7× higher current capability, AEC-Q101 validation, and guaranteed avalanche ruggedness - essential for mission-critical power stages.

Availability

DMN3018SFG-7 is available at Aetrix Electronics and suitable for automotive LED drivers, industrial DC-DC converters, and portable medical power rails requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for DMN3018SFG-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

The DMN3018SFG-7 belongs to Diodes' PowerMOS™ portfolio, engineered specifically for high-efficiency, high-density power conversion in space-constrained and thermally demanding applications - emphasizing low R_DS(ON), fast switching, and automotive-grade reliability.

FAQ

What is the maximum gate-source voltage rating for DMN3018SFG-7?

The absolute maximum gate-source voltage (V_GS) is ±25 V, as specified in the Absolute Maximum Ratings table. Exceeding this rating risks permanent gate oxide damage. Recommended operating V_GS is 0–12 V for reliable enhancement and longevity, with 10 V used for full R_DS(ON) specification and 4.5 V sufficient for logic-level drive in most applications.

Does DMN3018SFG-7 require a gate resistor, and what value is recommended?

Yes - a gate resistor is required to control dV/dt and suppress ringing. For 500 kHz switching with a 100 mA gate driver, a 10 Ω series resistor balances switching speed and EMI. At 13.2 nC Q_G, this yields ~132 ns turn-on delay. Lower values (e.g., 4.7 Ω) may be used with stronger drivers; values above 47 Ω significantly increase switching losses.

Is the exposed thermal pad on the PowerDI3333-8 package electrically connected, and how should it be handled?

Yes - the exposed pad is internally connected to the Drain (D) terminal and must be soldered to a large copper pour for thermal and electrical performance. Per datasheet layout guidelines, use a 1-inch² 2 oz copper thermal pad with ≥6 thermal vias (0.3 mm diameter) to internal ground or power planes. Leaving it unconnected degrades R_θJC by >5× and violates the 30 A rating.

How does the DMN3018SFG-7 perform under pulsed drain current conditions?

It supports 60 A pulsed drain current (I_DM) for 10 µs pulses at 1% duty cycle, validated per JEDEC JESD24-1. This enables short-circuit protection response and inrush current handling in DC-DC controllers. Pulse capability is limited by junction temperature rise - sustained >30 A requires active thermal management to maintain T_J < 150°C.