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Diodes Incorporated DMN3730UFB4-7B
- Part No.:
- DMN3730UFB4-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- 3-XFDFN
- Datasheet:
-
DMN3730UFB4-7B.pdf
- Description:
- MOSFET N-CH 30V 750MA 3DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,016
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Product details
Overview
DMN3730UFB4-7B from Diodes Incorporated is a 30V N-channel enhancement-mode MOSFET in an X2-DFN1006-3 package, featuring 460mΩ RDS(on) at VGS = 4.5V, 0.91A continuous drain current, and AEC-Q101 qualification for automotive-grade reliability-used as a low-voltage load switch in portable power management circuits.
For engineers reviewing the DMN3730UFB4-7B datasheet, DMN3730UFB4-7B pinout, DMN3730UFB4-7B application, or DMN3730UFB4-7B equivalent, key selection criteria include ultra-low profile (0.4mm height), gate-threshold compatibility with battery-level drive (VGS(th) = 0.45–0.95V), and ESD-protected gate (2kV HBM).
Technical Context
This MOSFET employs a trench-gate silicon process optimized for low RDS(on) while preserving fast switching performance (tD(on) = 3.5ns, tD(off) = 38ns) and low gate charge (Qg = 1.6nC). Its body diode exhibits VSD = 0.7–1.2V at IS = 300mA, supporting bidirectional conduction in compact DC-DC and load-switch topologies.
The device operates across –55°C to +150°C junction temperature, with thermal resistance RθJA = 180°C/W on FR4 PCB (min pad layout), and is rated for ±8V gate-source voltage-enabling robust operation under transient conditions in space-constrained battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 30V - supports input rails up to 28V nominal without breakdown risk |
| RDS(on) | 460mΩ @ VGS=4.5V - enables <100mW conduction loss at 0.7A load current |
| ID (continuous) | 0.91A @ TA=+25°C - sufficient for USB-powered peripherals and sensor node power gating |
| VGS(th) | 0.45–0.95V - ensures turn-on with single-cell Li-ion (3.0–3.6V) or coin-cell (3V) supply |
| Qg | 1.6nC - reduces gate-drive power and enables efficient PWM control at >1MHz |
| ESD Rating | 2kV HBM - protects against handling-induced gate damage during SMT assembly |
| TJ Range | –55°C to +150°C - qualified for under-hood automotive and industrial edge-node environments |
Pinout & Package
Package: X2-DFN1006-3 - 1.0mm × 0.6mm footprint, 0.4mm profile, NiPdAu-plated copper leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Source) | Source terminal (S) | Common return path for load current; electrically tied to exposed thermal pad |
| Pin 2 (Gate) | Control input (G) | High-impedance MOS gate requiring <3µA leakage; protected by integrated 2kV ESD diode |
| Pin 3 (Drain) | Power output (D) | Switched high-side or low-side output node; connects to load or supply rail |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low profile | 0.4mm height enables integration into <1mm-thick wearable and hearing aid PCBs |
| Small footprint | 0.6mm² area-10× smaller than SOT-23-reduces board real estate in multi-rail PMICs |
| Low VGS(th) | Turns on fully with 3V logic or single Li-ion cell, eliminating need for gate boosters |
| AEC-Q101 qualified | Validated for automotive load-switch applications including infotainment power sequencing |
| Green construction | Halogen- and antimony-free, RoHS-compliant molding compound (UL 94V-0 rated) |
Applications
| Smartphone Power Sequencing | USB-C Port Protection |
|---|---|
Use Scenario: Controlled power-up of camera module and display backlight after system boot. IC Role / Device Role / Timing Role: Low-side load switch enabling precise enable timing and inrush current limiting. Use Value: Prevents brown-out during simultaneous rail activation; RDS(on) < 500mΩ limits voltage drop to <450mV at 0.9A. | Use Scenario: Overcurrent and reverse-polarity protection for USB-C VBUS line in portable accessories. IC Role / Device Role / Timing Role: High-side switch controlled by USB PD controller to isolate faulty downstream devices. Use Value: Fast turn-off (tD(off) = 38ns) enables rapid fault response; 30V rating covers USB PD 20V max. |
| Automotive Cabin Sensor Node | Wireless Earbud Battery Management |
Use Scenario: Power gating of BLE transceiver and MEMS microphone in parked-state low-power mode. IC Role / Device Role / Timing Role: Always-on load switch with sub-1µA IDSS leakage minimizing quiescent drain. Use Value: IDSS ≤ 1µA extends battery life over months; AEC-Q101 rating ensures reliability in cabin temperature extremes. | Use Scenario: Isolating charging IC from battery during sleep mode to prevent parasitic discharge. IC Role / Device Role / Timing Role: Bidirectional blocking switch leveraging integrated body diode for reverse-current prevention. Use Value: VSD = 0.7V ensures minimal forward drop during trickle-charge paths; 0.4mm profile fits inside earbud housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN3025LFD-7 | RDS(on) = 25mΩ @ VGS=4.5V (10× lower), but larger X2-DFN2020-6 package (2.0mm × 2.0mm) | Higher current (3.5A) capability; unsuitable for ultra-thin designs where height <0.45mm is mandatory | Select when higher efficiency at >1A loads outweighs board area constraints |
| AO3400A | RDS(on) = 44mΩ @ VGS=10V but 560mΩ @ VGS=2.5V; no AEC-Q101 qualification | Lower cost general-purpose switch; not recommended for automotive or long-life portable deployments | Choose only for non-automotive consumer electronics with 3.3V GPIO control and relaxed reliability requirements |
Compared with DMN3730UFB4-7B, DMN3025LFD-7 delivers superior conduction efficiency at higher currents but sacrifices miniaturization, while AO3400A lacks automotive qualification and exhibits poorer low-VGS performance-making DMN3730UFB4-7B optimal for space- and reliability-critical 3V–4.5V battery-switching roles.
Availability
DMN3730UFB4-7B is available at Aetrix Electronics and suitable for smartphone power sequencing, USB-C port protection, and automotive cabin sensor node applications requiring stable component supply and long-term lifecycle support.
Supply support for DMN3730UFB4-7B 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 DMN3730UFB4-7B belongs to Diodes' X2-DFN ultra-miniature MOSFET product line, engineered specifically for space-constrained battery-powered devices requiring AEC-Q101 reliability and direct battery-level gate drive.
FAQ
What is the maximum continuous drain current for DMN3730UFB4-7B at +70°C ambient?
The maximum continuous drain current is 0.73A at TA = +70°C with surface mounting on a minimum recommended FR4 pad layout in still air. This derating reflects thermal limitations due to RθJA = 258°C/W under those conditions, ensuring safe junction temperature below 150°C.
Does DMN3730UFB4-7B support 1.8V logic-level gate drive?
Yes-its VGS(th) range of 0.45–0.95V and RDS(on) = 730mΩ at VGS = 1.8V (ID = 75mA) enables functional switching with 1.8V GPIO, though conduction loss increases significantly versus 4.5V drive; design verification at target load current is recommended.
Is the exposed thermal pad electrically connected internally?
Yes-the exposed pad (visible on bottom view) is internally connected to the Source terminal (Pin 1). It must be soldered to a PCB copper pour for both thermal dissipation and electrical continuity; floating the pad degrades RθJA and may cause malfunction.
What is the gate-to-source leakage current specification?
IGSS is specified as ≤3µA at VGS = ±8V and VDS = 0V. This low leakage ensures minimal standby power draw in always-on load-switch configurations and supports reliable operation in low-quiescent-current battery systems.
DMN3730UFB4-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-XFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 30 V
- Current - Continuous Drain (Id) @ 25°C:
- 750mA (Ta)
- Drive Voltage (Max Rds On, Min Rds On):
- 1.8V, 4.5V
- Rds On (Max) @ Id, Vgs:
- 460mOhm @ 200mA, 4.5V
- Vgs(th) (Max) @ Id:
- 950mV @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 1.6 nC @ 4.5 V
- Vgs (Max):
- ±8V
- Input Capacitance (Ciss) (Max) @ Vds:
- 64.3 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 470mW (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1006-3
DMN3730UFB4-7B FAQ
1.How can I place an order for DMN3730UFB4-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DMN3730UFB4-7B 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 DMN3730UFB4-7B reliable?
The price and inventory of DMN3730UFB4-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMN3730UFB4-7B is usually 5 days.
3.What payment methods are accepted for DMN3730UFB4-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMN3730UFB4-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMN3730UFB4-7B?
DMN3730UFB4-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMN3730UFB4-7B 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 DMN3730UFB4-7B?
For technical support, including DMN3730UFB4-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMN3730UFB4-7B requirements.
6.How does Aetrix verify that DMN3730UFB4-7B is sourced from the original manufacturer or authorized distributors?
All DMN3730UFB4-7B 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 DMN3730UFB4-7B meets industry standards.
7.What is the process for return or replacement of DMN3730UFB4-7B?
All DMN3730UFB4-7B units undergo pre-shipment inspection (PSI). If there is an issue with DMN3730UFB4-7B, 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 DMN3730UFB4-7B part is unused and in its original packaging.
Return procedure for DMN3730UFB4-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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