Diodes Incorporated DMP2540UCB9-7

Overview

DMP2540UCB9 from Diodes Incorporated is a P-channel enhancement-mode MOSFET in a 1.5 mm × 1.5 mm CSP package, rated for -25 V V_DSS, 33 mΩ R_DS(on) at V_GS = -4.5 V, and 4.8 nC total gate charge. It delivers low on-state loss and ultra-fast switching for compact battery protection and load-switching circuits in portable electronics.

For engineers reviewing the DMP2540UCB9 datasheet, DMP2540UCB9 pinout, DMP2540UCB9 application, or DMP2540UCB9 equivalent, key selection criteria include its -0.6 V typical gate threshold voltage, 6 kV HBM ESD rating, AEC-Q101 qualification, and thermal resistance of 69 °C/W on 1-inch² 2-oz copper PCB.

Technical Context

This MOSFET employs LD-MOS technology to achieve a low figure of merit (R_DS(on) × Q_g = 0.159 Ω·nC), enabling high-efficiency power control in space-constrained designs. Its -0.6 V V_GS(th) ensures reliable turn-on with low-voltage logic drive, while the integrated gate protection diode and 6 kV HBM ESD rating support robust operation in battery-connected systems.

The U-WLB1515-9 package features a 9-terminal layout with three parallel drain pads, dual source terminals, and a central gate-optimized for low-inductance, high-current paths and thermal dissipation in thin-profile applications up to +150 °C junction temperature.

Key Specifications

Pinout & Package

Package: U-WLB1515-9 - ultra-thin wafer-level BGA with 9 terminals arranged in 3×3 array (center terminal omitted), footprint 1.5 mm × 1.5 mm, height 0.62 mm, weight 0.0018 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel load switch applications.

Compared with DMN2053LVT-7 and AO3401, DMP2540UCB9 offers the smallest footprint and lowest R_DS(on) among the three, making it optimal for ultra-compact, high-efficiency battery systems demanding automotive-grade reliability and logic-level drive compatibility.

Availability

DMP2540UCB9 is available at Aetrix Electronics and suitable for battery protection, USB-C load switching, and medical IoT sensor node designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for DMP2540UCB9 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, manufacturing, and sales operations across Asia, Europe, and North America.

This device belongs to Diodes' LD-MOS power MOSFET product line, engineered specifically for high-efficiency, space-constrained power management in portable and automotive electronics where low R_DS(on), fast switching, and robust gate protection are critical.

FAQ

What is the maximum continuous drain current for DMP2540UCB9 at 70°C ambient?

At T_A = +70°C with recommended 1-inch² 2-oz copper pad layout, the maximum continuous drain current is -4.0 A (Note 6). This derating accounts for thermal resistance of 69 °C/W and junction-to-ambient temperature rise under steady-state conduction, ensuring safe operation below the 150°C maximum junction temperature.

Does DMP2540UCB9 require an external gate resistor for stability?

While not mandatory, a 2 Ω series gate resistor is used in the datasheet's switching timing characterization (t_D(on), t_r) to dampen ringing and control slew rate. In practice, gate resistance should be selected based on PCB layout, driver strength, and EMI requirements-typical values range from 0 Ω (direct drive) to 10 Ω for noise-sensitive applications.

Can DMP2540UCB9 be used in reverse-voltage protection circuits?

Yes-it is commonly deployed as a high-side reverse-polarity protection switch. With its -25 V V_DSS and low R_DS(on), it blocks reverse input voltage while introducing minimal forward drop. The body diode orientation (source-to-drain) must be verified in schematic placement to ensure correct blocking direction relative to input polarity.

Is the U-WLB1515-9 package compatible with standard reflow profiles?

Yes-the U-WLB1515-9 package is qualified for lead-free reflow per JEDEC J-STD-020, supporting peak temperatures up to 260°C. Recommended profile includes ramp rate ≤3°C/s, preheat 150–200°C for 60–120 s, soak 200–220°C for 60–120 s, and reflow above 217°C for 40–80 s, with cooling rate ≤6°C/s to prevent solder joint fracture or package delamination.