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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Diodes Incorporated DMP3120L-7

Name: DMP3120L-7
Brand: Diodes Incorporated
SKU: DMP3120L-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DMP3120L-7

Manufacturer:: Diodes Incorporated

Category:: FETs, MOSFETs

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: DMP3120L-7.pdf

Description:: MOSFET P-CH 30V 2.8A SOT-23

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Product details

Overview

DMP3120L from Diodes Incorporated is a P-channel enhancement-mode MOSFET in SOT-23 package, rated for -30V V_DSS, 120mΩ R_DS(on) at V_GS = -4.5V, and -2.8A continuous drain current at 25°C. It serves as a low-side load switch or reverse-polarity protection device in compact DC power rails for portable electronics and industrial control modules.

For engineers reviewing the DMP3120L datasheet, DMP3120L pinout, DMP3120L application, or DMP3120L equivalent, key selection criteria include gate threshold voltage (-0.6 to -1.4V), low-input capacitance (285pF C_iss), fast switching (5.6ns t_d(on)), thermal resistance (90°C/W), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This MOSFET operates with depletion-free P-channel enhancement mode, enabling turn-on with negative gate bias relative to source. Its low V_GS(th) range supports direct logic-level drive from 3.3V microcontrollers without level-shifting circuitry.

The device integrates a body diode with -1.1V forward voltage at -2.0A, supporting bidirectional current paths in battery backup circuits and hot-swap applications. Thermal performance is optimized for FR-4 PCB mounting with 90°C/W junction-to-ambient resistance under standard conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	-30V - Maximum blocking voltage for reverse-polarity protection in 24V systems
R_DS(on) @ V_GS = -4.5V	120mΩ - Enables ≤330mW conduction loss at 2.8A, suitable for thermally constrained PCBs
I_D (continuous)	-2.8A @ 25°C - Supports medium-power load switching in space-constrained designs
C_iss	285pF - Low input capacitance reduces gate drive power and speeds up switching transitions
t_d(on)	5.6ns - Fast turn-on delay enables high-frequency PWM control in DC-DC pre-regulators
T_J range	-55°C to +150°C - Qualified for under-hood automotive and industrial ambient environments
Q_G @ V_GS = -4.5V	3.0nC - Low total gate charge minimizes driver IC stress and improves efficiency

Pinout & Package

SOT-23 surface-mount package with 3-pin configuration, molded green plastic housing (UL 94V-0), matte tin-plated copper leadframe, and moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
Source (S)	Reference node for gate control and current return path	Connected to system ground or positive rail depending on high/low-side topology
Gate (G)	Control electrode for channel formation	Accepts logic-level negative bias; requires no external pull-up for default-off operation
Drain (D)	Current output terminal	Connects to load; body diode anode faces source, enabling reverse-current blocking

Key Features

Feature	Design Value
Low R_DS(on) at -4.5V	120mΩ enables efficient 3.3V GPIO-driven switching without gate boosting
AEC-Q101 qualified	Validated for automotive applications including body control modules and infotainment power sequencing
Halogen- and antimony-free	Meets <900ppm Br/Cl and <1000ppm Sb limits for environmentally compliant manufacturing
Fast switching with low Q_G	3.0nC gate charge at -4.5V supports >1MHz PWM in compact DC-DC stages

Applications

Reverse Polarity Protection

Battery Backup Switching

Use Scenario: Prevents damage when Li-ion or lead-acid batteries are inserted backward into portable medical monitors or handheld test equipment.

IC Role / Device Role / Timing Role: P-channel MOSFET configured as low-side switch with source tied to input, drain to load, and gate driven by microcontroller or dedicated supervisor IC.

Use Value: 120mΩ R_DS(on) limits voltage drop to <340mV at 2.8A, preserving >97% of input voltage under full load.

Use Scenario: Seamlessly transfers power between main supply and backup supercapacitor during AC mains failure in smart metering units.

IC Role / Device Role / Timing Role: Load switch managing bidirectional current flow using internal body diode for capacitor charging and controlled FET conduction for discharge.

Use Value: -1.1V V_SD ensures minimal forward drop during capacitor recharge, while fast 5.6ns t_d(on) enables rapid switchover within 10μs.

USB Port Power Control

Industrial Sensor Node Power Gating

Use Scenario: Enables/disables 5V USB VBUS to peripheral devices in embedded gateways, complying with USB 2.0 suspend current limits.

IC Role / Device Role / Timing Role: Low-side power switch placed between USB host controller and downstream port, controlled via I²C GPIO expander.

Use Value: 240mΩ R_DS(on) at -2.5V allows direct 2.5V logic drive, eliminating level shifter and reducing BOM count by one active component.

Use Scenario: Powers down analog front-end sensors (e.g., pressure, temperature) during sleep cycles in IIoT edge nodes to extend battery life.

IC Role / Device Role / Timing Role: High-efficiency load switch isolating sensor supply rail from main MCU domain, triggered by wake-up interrupt signal.

Use Value: 90°C/W thermal resistance permits sustained 2.2A operation at 70°C ambient without heatsinking, simplifying enclosure design.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMG3415L-7	R_DS(on) = 42mΩ @ -4.5V; higher gate charge (10.5nC); same SOT-23 package	Better conduction efficiency but slower switching; suited for static load control over high-frequency PWM	Select when lower I²R loss dominates over switching speed requirements
DMP2120U-7	R_DS(on) = 140mΩ @ -4.5V; higher V_GS(th) (-1.0 to -2.5V); same AEC-Q101 rating	Narrower gate drive margin with 3.3V logic; better noise immunity in EMI-heavy industrial settings	Select when robustness against false turn-on due to gate noise is prioritized over minimum R_DS(on)

Compared with DMG3415L-7 and DMP2120U-7, DMP3120L offers the best balance of low gate threshold, moderate R_DS(on), and fast switching-ideal for cost-sensitive, space-constrained 3.3V logic-driven power gating where thermal headroom is limited.

Availability

DMP3120L is available at Aetrix Electronics and suitable for reverse polarity protection, battery backup switching, USB port power control, and industrial sensor node power gating requiring stable component supply across production lifecycles.

Supply support for DMP3120L 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.

The DMP3120L belongs to Diodes' automotive-qualified P-channel MOSFET product line, engineered specifically for reliable, low-voltage logic-driven power switching in harsh-environment applications such as automotive body electronics and industrial control.

FAQ

Is DMP3120L suitable for high-side switching configurations?

No. DMP3120L is a P-channel MOSFET optimized for low-side switching or reverse-polarity protection where the source connects to the higher potential node. High-side use would require gate voltage exceeding the input rail-unachievable without a charge pump or floating supply, making it impractical for this device.

What is the maximum safe operating temperature for continuous conduction?

The DMP3120L has a maximum junction temperature of +150°C and a thermal resistance of 90°C/W. With 1.4W maximum power dissipation on FR-4 PCB, sustained operation at full -2.8A requires ambient temperatures below +70°C to maintain T_J ≤ 150°C-verified in Figure 4 of the datasheet.

Does DMP3120L require external gate resistors for EMI suppression?

Not inherently, but a 10–47Ω series gate resistor is recommended in high-speed switching applications to damp ringing caused by trace inductance interacting with C_iss (285pF) and C_rss (40pF). This improves electromagnetic compatibility without significantly degrading 5.6ns turn-on delay.

Can DMP3120L replace DMP3130L in existing designs?

Yes, with verification. Both share identical SOT-23 package, pinout, and AEC-Q101 qualification. DMP3120L offers lower R_DS(on) (120mΩ vs. 180mΩ at -4.5V) and faster switching, improving efficiency-but its slightly lower V_GS(th) (-0.6 to -1.4V vs. -0.7 to -1.5V) may increase susceptibility to noise-induced turn-on in noisy environments.

DMP3120L-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: P-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 2.8A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: 2.5V, 4.5V

Rds On (Max) @ Id, Vgs:: 120mOhm @ 2.8A, 4.5V

Vgs(th) (Max) @ Id:: 1.4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 6.7 nC @ 10 V

Vgs (Max):: ±12V

Input Capacitance (Ciss) (Max) @ Vds:: 285 pF @ 15 V

FET Feature:: -

Power Dissipation (Max):: 1.4W (Ta)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

DMP3120L-7 FAQ

1.How can I place an order for DMP3120L-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DMP3120L-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DMP3120L-7 reliable?

The price and inventory of DMP3120L-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMP3120L-7 is usually 5 days.

3.What payment methods are accepted for DMP3120L-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMP3120L-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DMP3120L-7?

DMP3120L-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DMP3120L-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DMP3120L-7?

For technical support, including DMP3120L-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMP3120L-7 requirements.

6.How does Aetrix verify that DMP3120L-7 is sourced from the original manufacturer or authorized distributors?

All DMP3120L-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DMP3120L-7 meets industry standards.

7.What is the process for return or replacement of DMP3120L-7?

All DMP3120L-7 units undergo pre-shipment inspection (PSI). If there is an issue with DMP3120L-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DMP3120L-7 part is unused and in its original packaging.

Return procedure for DMP3120L-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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