Diodes Incorporated DMN21D1UDA-7B

Overview

DMN21D1UDA-7B from Diodes Incorporated is a dual N-channel enhancement-mode MOSFET in an ultra-small X2-DFN0806-6 package (0.8 mm × 0.6 mm), rated for 20 V V_DSS, 0.99 Ω R_DS(ON) at V_GS = 4.5 V, and 455 mA continuous drain current at T_A = +25°C. It features a low 1.0 V max gate threshold voltage and ESD-protected gates, enabling reliable operation in space-constrained, low-voltage power management circuits such as portable battery-powered load switching.

For engineers reviewing the DMN21D1UDA-7B datasheet, DMN21D1UDA-7B pinout, DMN21D1UDA-7B application, or DMN21D1UDA-7B equivalent, key selection criteria include its dual-channel configuration, sub-1V logic-compatible gate drive, ultra-low on-resistance at 1.5–2.5 V V_GS, thermal resistance of 405 °C/W, and qualification for high-density PCB layouts with minimal pad area.

Technical Context

This dual MOSFET integrates two independent N-channel devices sharing no internal connection-each channel has separate source, drain, and gate terminals. Its 1.0 V max V_GS(TH) enables direct interfacing with 1.2–1.8 V I/O domains, while low C_iss (31 pF) and fast switching times (t_D(ON) = 4.5 ns, t_F = 12 ns) support efficient high-frequency PWM control.

The device uses a thermally optimized DFN package with exposed copper paddle for enhanced heat dissipation, and each gate includes integrated protection diodes to suppress ESD transients up to ±2 kV HBM. Its R_DS(ON) remains stable across −55°C to +150°C junction temperature, with <10% variation over full range at V_GS = 4.5 V.

Key Specifications

Pinout & Package

Package: X2-DFN0806-6 - ultra-compact 0.8 mm × 0.6 mm, 0.36 mm height, 6-terminal leadless plastic package with exposed thermal paddle. Compliant with J-STD-020 Level 1 moisture sensitivity and RoHS/"Green" requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMN21D1UDA-7B, DMN2016LFG-7 offers lower R_DS(ON) but doubles component count and board area, while AO6401 provides higher voltage headroom and current capacity at the cost of 6× larger footprint-making DMN21D1UDA-7B optimal for miniaturized 1.2–3.3 V systems where dual-channel integration and sub-1V gate drive are essential.

Availability

DMN21D1UDA-7B is available at Aetrix Electronics and suitable for portable medical monitors, wireless sensor nodes, and USB-C accessory designs requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for DMN21D1UDA-7B 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, energy-efficient components for consumer, industrial, and communications markets.

The DMN21D1UDA belongs to Diodes' X2-DFN ultra-miniature MOSFET product line, engineered specifically for space-constrained, low-voltage power switching in battery-operated and wearable electronics.

FAQ

What is the maximum safe operating junction temperature for DMN21D1UDA-7B?

The absolute maximum junction temperature is +150°C, validated across all operating conditions per the datasheet. Derating begins at +125°C ambient when dissipating >150 mW; thermal design must maintain T_J ≤ 150°C using the specified R_θJA = 405 °C/W and recommended PCB pad layout.

Can DMN21D1UDA-7B be used in a high-side switch configuration?

Yes-each channel operates independently and supports high-side switching when the source is connected to the load and the drain to V_IN. Gate drive must exceed V_IN by ≥V_GS(TH); for 3.3 V rail, a 4.5 V gate drive is recommended to ensure R_DS(ON) < 1 Ω.

Is the X2-DFN0806-6 package compatible with standard reflow profiles?

Yes-the package is qualified for IPC/JEDEC J-STD-020 Level 1 moisture sensitivity and supports standard lead-free reflow profiles (peak 260°C, 60 sec max). The matte tin finish ensures reliable solder wetting, and the 0.13 mm nominal lead thickness accommodates fine-pitch stencil printing.

Does DMN21D1UDA-7B include body diode conduction capability?

Yes-each channel includes an intrinsic body diode (anode at source, cathode at drain) with typical forward voltage of 0.6 V at 10 mA. This enables freewheeling in inductive loads and reverse-current blocking in back-to-back configurations, though external Schottky diodes may be added for faster recovery in high-frequency applications.