Diodes Incorporated DMC3732UVTQ-13

Overview

DMC3732UVTQ from Diodes Incorporated is a complementary-pair enhancement-mode MOSFET in a single TSOT26 package, integrating one 30V N-channel (Q1) and one –30V P-channel (Q2) device with R_DS(ON) of 460mΩ @ V_GS = 4.5V (Q1) and 1000mΩ @ V_GS = –4.5V (Q2), rated for 1.1A and –0.7A respectively-designed for compact DC-DC converter power stages and backlight LED current control in space-constrained automotive and industrial modules.

For engineers reviewing the DMC3732UVTQ datasheet, DMC3732UVTQ pinout, DMC3732UVTQ application, or DMC3732UVTQ equivalent, this AEC-Q101 qualified dual MOSFET supports low-voltage logic-level drive, delivers fast switching (t_F ≤ 20ns), maintains low input capacitance (C_iss = 40.8pF/54pF), and operates across –55°C to +150°C junction temperature-critical for high-reliability power management in automotive infotainment and portable power systems.

Technical Context

This dual MOSFET implements complementary channel pairing in a monolithic TSOT26 footprint to enable half-bridge or load-switch topologies without discrete layout mismatch. Q1 features a gate threshold voltage of 0.45–0.95V and exhibits R_DS(ON) variation <1.6× over –55°C to +150°C at V_GS = 4.5V; Q2 has V_GS(TH) = –0.5 to –1.1V and normalized R_DS(ON) drift <1.4× across the same range.

Thermal performance is defined by two distinct R_θJA values: 230°C/W (minimum pad) and 150°C/W (1-inch² copper), enabling accurate thermal margining in both minimal and enhanced PCB layouts. The integrated body diodes support synchronous rectification with V_SD = 0.6–1.2V (Q1) and –0.9 to –1.2V (Q2) at I_S = 300mA, verified under pulsed conditions per JEDEC JESD24-1.

Key Specifications

Pinout & Package

Package: TSOT26 - ultra-thin (1.0mm max height), 6-pin surface-mount package with matte tin annealed terminals, UL 94V-0 molding compound, and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DMC2038UVTQ, DMC3732UVTQ delivers 23% lower R_DS(ON) on Q1 and 23% higher current rating-critical for thermally constrained automotive modules. Against DMC3025LSD, it eliminates layout asymmetry and gate-drive timing mismatch inherent in discrete complementary pairs.

Availability

DMC3732UVTQ is available at Aetrix Electronics and suitable for automotive infotainment power rails, portable device backlight control, and industrial sensor node power management requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.

Supply support for DMC3732UVTQ 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 consumer markets.

The DMC3732UVTQ belongs to Diodes' AEC-Q101-qualified complementary MOSFET product line, engineered specifically for space-constrained, thermally demanding power-switching applications where matched N/P characteristics and automotive-grade reliability are mandatory.

FAQ

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

At T_A = +70°C, Q1 supports 0.9A continuous drain current and Q2 supports –0.6A, as specified in the Maximum Ratings table under "Continuous Drain Current (Note 6)". These values reflect derating from the +25°C ratings (1.1A/–0.7A) due to thermal resistance limitations on standard FR-4 PCBs with minimum copper area.

Can DMC3732UVTQ be used in a synchronous buck converter as both high-side and low-side switches?

No-Q2 is a P-channel MOSFET with –30V V_DSS and –0.7A rating, making it unsuitable as a low-side switch in standard buck topologies. It functions best as a high-side switch or load switch; for true synchronous buck operation, a second N-channel device (e.g., DMC3025LSD) is required for the low-side position.

Is the TSOT26 package lead (Pb)-free and RoHS-compliant?

Yes-the DMC3732UVTQ uses matte tin-annealed terminals over copper leadframe and fully complies with EU RoHS directives 2002/95/EC, 2011/65/EU, and 2015/863/EU. It contains no purposely added lead and meets Diodes' "Green" definition: <900ppm bromine, <900ppm chlorine, and <1000ppm antimony.

How does the gate threshold voltage vary with temperature for Q1 and Q2?

Per Figures 8 and 20, Q1's V_GS(TH) decreases from 0.95V at –55°C to 0.45V at +150°C (ID = 250μA); Q2's V_GS(TH) shifts from –1.1V to –0.5V over the same range (ID = –250μA). This negative temperature coefficient ensures stable turn-on behavior across the full operating junction temperature range.