Diodes Incorporated DMC3400SDW-7

Overview

DMC3400SDW-7 from Diodes Incorporated is a complementary pair enhancement-mode MOSFET in SOT363 package, integrating one N-channel (30 V, 0.4 Ω @ 10 V) and one P-channel (−30 V, 0.9 Ω @ −10 V) device for half-bridge or level-shifting power control. It delivers 0.65 A/−0.45 A continuous drain current at 25°C with ESD-protected gates and low input capacitance (55/54 pF), enabling efficient DC-DC converters and motor drive stages.

For engineers reviewing the DMC3400SDW-7 datasheet, DMC3400SDW-7 pinout, DMC3400SDW-7 application, or DMC3400SDW-7 equivalent, key selection criteria include dual-channel R_DS(ON) matching at 4.5 V/−4.5 V, thermal resistance of 319 °C/W under high-copper PCB layout, and gate charge asymmetry (1.4 nC vs. 1.3 nC) affecting PWM dead-time design.

Technical Context

This dual MOSFET implements complementary switching in compact space-constrained topologies. The N-channel Q1 features V_GS(TH) = 0.8–1.6 V and fast turn-on delay (3.8 ns), while the P-channel Q2 has V_GS(TH) = −1.0 to −2.6 V and higher gate resistance (240 Ω), requiring asymmetric gate drive strength for balanced edge timing.

Both devices share identical SOT363 thermal footprint and operate across −55°C to +150°C junction range. Their matched C_iss/C_oss values (55/8.5 pF and 54/10 pF) support predictable snubberless operation in synchronous buck or H-bridge configurations with <100 ns total propagation delay.

Key Specifications

Pinout & Package

Package: SOT363 - 6-pin ultra-small surface-mount package with 0.65 mm pitch, 2.15 mm × 2.10 mm footprint, and 0.95 mm height; rated for moisture sensitivity level 1 (J-STD-020).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar complementary MOSFET applications.

Compared with DMC3400SDW-7, DMC2038LSDW-7 improves conduction efficiency but increases gate drive demand, while SI6926ADQ-T1-GE3 trades package size for robustness-neither offers identical 30 V/0.4–0.9 Ω balance in SOT363.

Availability

DMC3400SDW-7 is available at Aetrix Electronics and suitable for motor control, DC-DC converters, and USB-C power delivery applications requiring stable component supply and lead-free compliance.

Supply support for DMC3400SDW-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in Taiwan and China.

The DMC3400SDW belongs to Diodes' small-signal complementary MOSFET product line, engineered for space-constrained power management where dual-channel integration, low gate charge, and thermal reliability are critical.

FAQ

What is the maximum safe operating frequency for DMC3400SDW-7 in a synchronous buck converter?

Based on measured t_D(ON)/t_F (3.8 ns/18.8 ns for Q1) and C_iss = 55 pF, the device supports stable operation up to 2.1 MHz with proper gate drive strength (≤100 Ω) and layout-controlled parasitics. Above this, overlap loss increases significantly due to asymmetric Q2 turn-off delay (35 ns), requiring dead-time extension beyond 50 ns.

Can DMC3400SDW-7 be used in automotive applications?

DMC3400SDW-7 is not AEC-Q101 qualified per Diodes' documentation. While its −55°C to +150°C T_J range meets automotive ambient requirements, it lacks PPAP documentation, IATF 16949 traceability, and stress-test validation required for under-hood use. For automotive, contact Diodes for AEC-Q101-compliant variants like DMC3028LSDW-7.

How does the shared drain configuration affect PCB layout?

The common drain (Pin 3/D1 and Pin 4/D2) mandates a single copper pour connecting both high-side outputs, minimizing loop inductance in half-bridge switching. This requires careful separation from gate traces-minimum 0.3 mm clearance-and avoids vias under the SOT363 body to preserve thermal resistance (R_θJA = 319 °C/W).

Is external gate resistor required for ESD protection?

No external gate resistor is needed solely for ESD protection-the device integrates on-chip gate protection diodes rated for >2 kV HBM. However, a 10–47 Ω series resistor is recommended to dampen ringing caused by gate trace inductance and prevent unintended oscillation during fast-edge driving.