Diodes Incorporated DMMT3906W-7

Overview

DMMT3906W-7 from Diodes Incorporated is a matched dual PNP small-signal transistor in SOT363 package, rated for -40V V_CEO, -200mA I_C, and 2% h_FE matching between transistors; it serves as a precision current mirror or differential pair in analog front-ends for instrumentation amplifiers and comparators.

For engineers reviewing the DMMT3906W-7 datasheet, DMMT3906W-7 pinout, DMMT3906W-7 application, or DMMT3906W-7 equivalent, key selection criteria include intrinsic die-matched h_FE and V_BE tracking (±2 mV), AEC-Q101 qualification, SOT363 thermal resistance (625°C/W), and dual-transistor isolation for high-accuracy biasing circuits.

Technical Context

This device integrates two adjacent-die PNP transistors on a single silicon substrate to achieve intrinsic matching-enabling precise current mirroring without external trimming. Its matched h_FE (±2%) and V_BE (±2 mV) are specified at I_C = −2 mA, V_CE = −5 V, ensuring stable gain and offset performance across temperature.

The SOT363 package provides fully internal isolation between transistors, eliminating parasitic coupling. With R_θJA = 625°C/W and P_D = 200 mW, it supports operation from −65°C to +150°C under standard PCB layout conditions.

Key Specifications

Pinout & Package

SOT363 is a 6-pin surface-mount plastic package with gull-wing leads, measuring 2.15 mm × 2.10 mm × 1.00 mm (L × W × H), UL 94V-0 rated, and featuring matte tin terminations for reliable solderability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar matched PNP transistor applications.

Compared with DMMT3906W-7, DMBT3906W-7 offers polarity inversion with identical matching specs and qualification, while BCM847DS trades matching precision and automotive compliance for complementary topology flexibility in non-critical applications.

Availability

DMMT3906W-7 is available at Aetrix Electronics and suitable for current mirrors, differential amplifiers, comparators, and temperature-stable references requiring stable component supply and AEC-Q101-compliant performance.

Supply support for DMMT3906W-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, specializing in high-reliability components for automotive, industrial, and computing markets.

The DMMT3906W-7 belongs to Diodes' matched transistor product line, engineered specifically for precision analog functions where intra-die matching and thermal tracking are essential to system-level accuracy.

FAQ

What is the maximum operating temperature for DMMT3906W-7?

The DMMT3906W-7 is rated for junction and storage temperatures from −65°C to +150°C. Its thermal resistance (R_θJA = 625°C/W) means that at 200 mW dissipation on a standard FR4 board, junction temperature rises ~125°C above ambient-so continuous operation at full power is limited to ≤25°C ambient to stay within the 150°C limit.

Is DMMT3906W-7 pin-compatible with single-transistor SOT-23 PNP devices?

No-DMMT3906W-7 uses the 6-pin SOT363 package with two independent PNP transistors (C1/B1/E1 and C2/B2/E2), whereas SOT-23 holds one transistor with different pin assignments. Direct substitution would require PCB redesign and revalidation of matching-dependent circuit behavior.

Does the 2% h_FE matching apply across the full operating range?

The ±2% h_FE matching is guaranteed at I_C = −2 mA and V_CE = −5 V per transistor. At other bias points (e.g., I_C = −100 mA), matching degrades-datasheet shows h_FE min/max spreads widen, so design margins must account for worst-case mismatch outside the test condition.

Can DMMT3906W-7 be used in linear regulator pass elements?

No-it is optimized for small-signal matching, not power handling. With P_D = 200 mW and I_C = −200 mA, its V_CE(SAT) is −400 mV at high current, limiting usable dropout voltage and making it unsuitable as a series pass device; dedicated power transistors or MOSFETs are required instead.