Diodes Incorporated DMC3018LSD-13

Overview

DMC3018LSD-13 from Diodes Incorporated is a complementary pair enhancement-mode MOSFET in SO-8 package, integrating one N-channel (30V, 20mΩ @ 10V) and one P-channel (-30V, 45mΩ @ -10V) device for bidirectional power control. It delivers 9.1A/–6A continuous drain current at 25°C and supports fast switching with 5.9–12.4nC total gate charge, enabling high-efficiency load switching in compact DC-DC converters.

For engineers reviewing the DMC3018LSD-13 datasheet, DMC3018LSD-13 pinout, DMC3018LSD-13 application, or DMC3018LSD-13 equivalent, key selection criteria include dual-channel R_DS(on) matching at 4.5V/–4.5V, AEC-Q101 qualification, SO-8 thermal resistance (50°C/W), and low gate threshold (±1.0–2.1V) for 3.3V logic compatibility.

Technical Context

This dual MOSFET implements independent N- and P-channel channels in a single SO-8 footprint, sharing no internal connection between gates or sources-enabling fully asynchronous control of high-side and low-side paths. Its design targets synchronous rectification and H-bridge drive where matched V_GS(th) (±1.0–2.1V) and R_DS(on) temperature stability (±15% over –55°C to +125°C) reduce shoot-through risk.

The device uses planar trench-gate technology to achieve low input capacitance (C_iss = 631pF/722pF) and minimal reverse transfer capacitance (C_rss = 99pF/92pF), supporting >1MHz switching in buck converters while maintaining <1.2V body diode forward voltage under 1A reverse conduction.

Key Specifications

Pinout & Package

SO-8 surface-mount package with exposed thermal pad (non-electrical), 1.27mm pitch, JEDEC MS-012AC compliant. Molded plastic body meets UL 94V-0 flammability rating and J-STD-020 Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMC3021LSD-13, DMC3018LSD-13 offers 29% lower N-ch R_DS(on) at 4.5V, improving light-load efficiency; versus SI6954DQ-T1-GE3, it trades 1.4nC higher gate charge for AEC-Q101 compliance and 0.3V lower |V_GS(th)| tolerance, enhancing 3.3V logic margin.

Availability

DMC3018LSD-13 is available at Aetrix Electronics and suitable for USB Power Delivery implementations, automotive body electronics, industrial PLC I/O modules, and portable medical instrument power-path management requiring stable component supply and AEC-Q101 assurance.

Supply support for DMC3018LSD-13 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 and signal integrity solutions for automotive, industrial, and computing markets.

The DMC3018LSD belongs to Diodes' AEC-Q101-qualified complementary MOSFET product line, engineered specifically for space-constrained bidirectional power control in automotive body electronics and industrial automation where thermal robustness and gate-drive compatibility with 3.3V logic are critical.

FAQ

What is the maximum continuous drain current for each channel at 70°C ambient?

The N-channel supports 7.7A and the P-channel supports –5A at T_A = +70°C, as specified in the Absolute Maximum Ratings table. These values reflect derating due to reduced thermal headroom and are measured on FR-4 PCB with 2oz copper pads (R_θJA = 50°C/W). Exceeding these currents requires forced-air cooling or enhanced heatsinking.

Can the N-channel and P-channel sources be tied together externally?

Yes, the S1 (P-ch source) and S2 (N-ch source) pins are electrically isolated internally and may be connected externally to form a common-source configuration for H-bridge or half-bridge topologies. However, doing so requires careful gate drive sequencing to prevent shoot-through, as the devices share no internal timing coordination.

Is the thermal pad on the SO-8 package electrically connected to any pin?

No, the exposed thermal pad on the bottom of the SO-8 package is not electrically connected to any internal die or pin-it serves only for thermal conduction to the PCB. Diodes Incorporated's recommended pad layout (AP02001) specifies solder mask defined thermal relief to prevent solder wicking and ensure mechanical reliability during reflow.

Does the device include integrated ESD protection on gate terminals?

Yes, the DMC3018LSD-13 incorporates on-die ESD protection rated to ±2kV HBM (Human Body Model) per JESD22-A114, verified during AEC-Q101 qualification. This protects gate oxides during handling and board assembly but does not replace system-level TVS protection for transient events exceeding 2kV.