Diodes Incorporated DMN2050LFDB-7

Overview

DMN2050LFDB from Diodes Incorporated is a dual N-channel enhancement-mode MOSFET in U-DFN2020-6 (Type B) package, rated for 20V V_DSS, 45 mΩ R_DS(ON) @ 4.5V V_GS, and 4.5A continuous drain current at +25°C. It delivers low on-resistance and fast switching for high-efficiency power management in space-constrained portable systems.

For engineers reviewing the DMN2050LFDB datasheet, DMN2050LFDB pinout, DMN2050LFDB application, or DMN2050LFDB equivalent, key selection criteria include its dual-channel layout, 2.5V gate threshold compatibility, 389 pF input capacitance, thermal resistance of 89°C/W (with copper pad), and suitability for synchronous rectification in DC-DC converters.

Technical Context

This dual MOSFET integrates two matched N-channel devices in a single compact U-DFN2020-6 package with shared thermal path and independent gate control. Its 0.4–1.0V gate threshold enables logic-level drive from 2.5V/3.3V microcontrollers, while low 63 pF Crss supports clean switching with minimal Miller-induced shoot-through risk.

The device uses trench-gate technology to achieve 28 mΩ typical R_DS(ON) at 4.5V and maintains stable on-resistance across –55°C to +150°C junction temperature. Its 5.7 nC total gate charge (at 4.5V) and 5 ns turn-on delay support efficient operation up to several MHz in buck converter topologies.

Key Specifications

Pinout & Package

Package: U-DFN2020-6 (Type B), 2.0 mm × 2.0 mm × 0.6 mm, bottom-exposed thermal pad, RoHS-compliant NiPdAu-plated terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN2050LFDB, DMN2053LFB-7 trades 33% higher conduction loss for lower unit cost, while SI2302DS-T1-GE3 sacrifices integration, thermal performance, and layout simplicity-making DMN2050LFDB optimal for new compact, high-efficiency dual-switch designs.

Availability

DMN2050LFDB is available at Aetrix Electronics and suitable for battery charging circuits, portable DC-DC converters, and USB-C power delivery modules requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for DMN2050LFDB 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DMN2050LFDB belongs to Diodes' PowerMOS™ family, engineered specifically for high-efficiency, space-constrained power conversion in portable and battery-powered systems where low R_DS(ON), fast switching, and thermal reliability are critical.

FAQ

What is the maximum safe operating temperature for DMN2050LFDB?

The DMN2050LFDB has a specified junction temperature range of –55°C to +150°C. Its absolute maximum rating is TJ = +150°C, and it achieves this with proper PCB thermal design: using a 1-inch² copper pad yields R_θJA = 89°C/W, allowing 1.42 W continuous power dissipation at TA = +25°C. Derating is required above +70°C ambient.

Can DMN2050LFDB be used in automotive applications?

DMN2050LFDB is not AEC-Q101 qualified and is not intended for automotive safety-critical systems. While its –55°C to +150°C operating range meets under-hood temperature extremes, Diodes Incorporated explicitly states that automotive-grade parts require PPAP capability and IATF 16949 manufacturing-conditions not met by this standard commercial-grade part.

How does the U-DFN2020-6 (Type B) package affect PCB layout?

The U-DFN2020-6 (Type B) package requires precise solder paste stencil design (0.12 mm thickness, 80% area ratio) and reflow profile control to ensure void-free thermal pad attachment. Its 0.65 mm pitch and bottom thermal pad demand IPC Class 2+ assembly standards; insufficient copper pour under the pad increases R_θJA by >40%, risking thermal runaway at >1A continuous load.

Is DMN2050LFDB suitable for synchronous rectification in boost converters?

Yes-its 0.75 V typical body diode forward voltage (V_SD) and 8.5 ns reverse recovery time (t_RR) make it effective for synchronous rectification in boost topologies up to 2 MHz. The dual-channel configuration allows one device to serve as main switch and the other as synchronous rectifier, provided gate drive sequencing avoids shoot-through via appropriate dead-time control.