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Diodes Incorporated DMN3732UFB4Q-7B
- Part No.:
- DMN3732UFB4Q-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- FETs, MOSFETs
- Package:
- 3-XFDFN
- Datasheet:
-
DMN3732UFB4Q-7B.pdf
- Description:
- MOSFET BVDSS: 25V~30V X2-DFN1006
- Quantity:
- Payment:
- Shipping:
Inventory:6,232
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Product details
Overview
DMN3732UFB4Q-7B from Diodes Incorporated is a 30V N-channel enhancement-mode MOSFET in X2-DFN1006-3 package, optimized for ultra-low-profile load switching with RDS(ON) = 460 mΩ @ VGS = 4.5V, ID = 1.3 A, and AEC-Q101 qualification for automotive power management.
For engineers reviewing the DMN3732UFB4Q-7B datasheet, DMN3732UFB4Q-7B pinout, DMN3732UFB4Q-7B application, or DMN3732UFB4Q-7B equivalent, this device supports battery-direct drive (VGS(TH) = 0.45–0.95 V), delivers low thermal resistance (RθJA = 112 °C/W on 1″² copper), and enables space-constrained portable and automotive subsystems requiring high reliability and green compliance.
Technical Context
This MOSFET employs a trench-gate silicon process to achieve low gate charge (Qg = 0.9 nC) and fast switching (tF = 20.0 ns), supporting efficient DC-DC load control in always-on domains. Its ESD-protected gate and ±8 V VGSS rating ensure robustness in handheld and infotainment power rails.
The device operates across –55°C to +150°C junction temperature, with normalized RDS(ON) variation ≤1.8× over full range and diode forward voltage VSD = 0.7–1.2 V at IS = 300 mA - enabling predictable body-diode conduction in bidirectional current paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 30 V - Maximum drain-source blocking voltage for 12 V automotive and 5 V/3.3 V system rail protection. |
| RDS(ON) | 460 mΩ @ VGS = 4.5V, ID = 200 mA - Enables <100 mW conduction loss at 1 A in compact PCB layouts. |
| ID (continuous) | 1.3 A @ TA = +25°C - Sustains typical USB-C PD port or sensor module load current without forced cooling. |
| VGS(TH) | 0.45–0.95 V - Allows direct drive from Li-ion battery (2.8–4.2 V) or low-voltage MCU GPIO without level-shifting. |
| Qg | 0.9 nC - Reduces gate-drive power and enables >1 MHz PWM operation in buck converter high-side switches. |
| RθJA | 112 °C/W - Achieved with 1″² copper pad; limits junction rise to <125°C at 0.49 W dissipation in automotive ambient. |
| Ciss | 40.8 pF - Low input capacitance minimizes Miller effect and improves turn-on speed under capacitive gate drive. |
Pinout & Package
Package: X2-DFN1006-3 (1.0 × 0.6 mm, 0.4 mm height), molded plastic with NiPdAu-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Source) | Source terminal (S) | Common return path for load current; internally connected to exposed thermal pad for enhanced heat transfer. |
| 2 (Gate) | Control terminal (G) | Low-threshold input accepting 1.2–4.5 V logic; ESD-protected to withstand >2 kV HBM per JESD22-A114. |
| 3 (Drain) | Power input/output (D) | High-side connection point for switched rail; rated for 30 V blocking and pulsed 3.3 A peak current. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low profile | 0.4 mm max height - fits beneath 0.5 mm board gaps in stacked modules and wearable enclosures. |
| Footprint area | 0.6 mm² - 10× smaller than SOT-23, freeing PCB space for routing or additional passives in wearables. |
| AEC-Q101 qualification | Qualified for automotive grade 1 (–40°C to +125°C ambient); PPAP-capable with IATF 16949 manufacturing. |
| Green compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); fully RoHS 3 compliant with no added lead. |
| Body diode performance | VSD = 0.7 V typ @ IS = 300 mA - Supports reverse-current recovery in synchronous rectifier or OR-ing applications. |
Applications
| Automotive Body Control Module (BCM) | USB-C Power Delivery Load Switch |
|---|---|
Use Scenario: Controlling 12 V accessory power (e.g., interior lighting, mirror heaters) with microcontroller GPIO. IC Role / Device Role / Timing Role: Low-side load switch enabling precise ON/OFF timing and fault current limiting via external sense resistor. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle life; low RDS(ON) reduces thermal derating in sealed BCM housings. |
Use Scenario: Enabling/disabling VBUS to downstream USB-C peripherals during hot-plug detection and power negotiation. IC Role / Device Role / Timing Role: High-speed, low-leakage power path switch with <1 µA IDSS ensuring standby compliance. Use Value: 0.4 mm profile allows placement adjacent to USB-C connector; fast tF/tR prevents voltage droop during dynamic load transitions. |
| Portable Medical Sensor Node | Smart Home Battery-Powered Actuator |
Use Scenario: Isolating BLE radio and sensor supply rails to extend coin-cell battery life between measurements. IC Role / Device Role / Timing Role: Ultra-low-threshold switch (VGS(TH) down to 0.45 V) driven directly by 2.8 V coin-cell output. Use Value: Sub-1 µA gate leakage and 1.1 A continuous rating support multi-year operation with <10 µA average system quiescent current. |
Use Scenario: Driving small solenoids or latching relays in battery-powered smart locks and thermostats. IC Role / Device Role / Timing Role: High-pulse-current switch (IDM = 3.3 A) handling inrush into inductive loads without external flyback protection. Use Value: Integrated body diode with 59 ns tRR clamps inductive kickback, eliminating need for discrete freewheeling diode and saving BOM cost. |
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) = 25 mΩ @ VGS = 4.5V, but larger X1-DFN1212-3 (1.2 × 1.2 mm) package and higher Qg = 2.2 nC. | Higher current (4.5 A) capability suits higher-power motor drivers; unsuitable where 0.4 mm height or 0.6 mm² footprint is mandatory. | Select when lower conduction loss outweighs size constraints and thermal budget allows higher PD. |
| AO3414 | Same X2-DFN1006-3 package, but VDSS = 20 V, RDS(ON) = 55 mΩ @ VGS = 4.5V, and no AEC-Q101 qualification. | Limited to 5 V/3.3 V systems; lacks automotive qualification and fails at 24 V transient surges common in vehicle electronics. | Acceptable only for non-automotive consumer devices with strict voltage headroom and no reliability certification requirement. |
Compared with DMN3025LFD-7 and AO3414, the DMN3732UFB4Q-7B uniquely balances AEC-Q101 compliance, sub-0.4 mm height, and 30 V rating - making it the sole choice for space-limited automotive and medical-grade load switching where both safety certification and miniaturization are non-negotiable.
Availability
DMN3732UFB4Q-7B is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power delivery systems, portable medical sensors, and smart home actuators requiring stable component supply across extended product lifecycles.
Supply support for DMN3732UFB4Q-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 and signal integrity solutions for automotive, industrial, and consumer markets.
The DMN3732UFB4Q-7B belongs to Diodes' AEC-Q101-qualified DFN MOSFET family, engineered specifically for space-constrained, battery-sensitive, and safety-critical load-switching applications in automotive and portable electronics.
FAQ
What is the maximum allowable gate-source voltage for DMN3732UFB4Q-7B?
The absolute maximum VGS rating is ±8 V, as specified in the datasheet's Maximum Ratings table. Exceeding this value risks permanent gate oxide damage. For reliable operation, gate drive should be limited to 4.5 V for optimal RDS(ON), and never exceed 6 V without series resistance to limit transient overshoot during switching.
Does DMN3732UFB4Q-7B require an external gate resistor in typical load-switch applications?
No external gate resistor is required for basic ON/OFF load switching due to its low Qg (0.9 nC) and robust gate oxide. However, a 10–100 Ω resistor is recommended when driving from long PCB traces or noisy MCU outputs to damp ringing and reduce EMI, especially in automotive environments where conducted emissions must meet CISPR 25 Class 5 limits.
How does the body diode performance impact reverse-current behavior in OR-ing configurations?
The body diode has VSD = 0.7 V typical at 300 mA and tRR = 59 ns, enabling use in low-voltage OR-ing without external Schottky diodes. Its low forward drop minimizes voltage loss, while fast recovery prevents cross-conduction during source switchover - critical for seamless power path arbitration in dual-battery or backup-supply systems.
Can DMN3732UFB4Q-7B be used in linear-regulation mode (e.g., as a pass element)?
No - the device is not characterized or rated for linear-mode operation. Its Safe Operating Area (SOA) graph shows only single-pulse capability up to 10 ms at 1 A, and RDS(ON) increases significantly with temperature. Continuous linear regulation would exceed thermal limits and cause premature failure; it is strictly intended for switching-mode load control.
DMN3732UFB4Q-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:
- 1.3A (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:
- 0.9 nC @ 4.5 V
- Vgs (Max):
- ±8V
- Input Capacitance (Ciss) (Max) @ Vds:
- 40.8 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 490mW (Ta)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X2-DFN1006-3
DMN3732UFB4Q-7B FAQ
1.How can I place an order for DMN3732UFB4Q-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DMN3732UFB4Q-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 DMN3732UFB4Q-7B reliable?
The price and inventory of DMN3732UFB4Q-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DMN3732UFB4Q-7B is usually 5 days.
3.What payment methods are accepted for DMN3732UFB4Q-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DMN3732UFB4Q-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DMN3732UFB4Q-7B?
DMN3732UFB4Q-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DMN3732UFB4Q-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 DMN3732UFB4Q-7B?
For technical support, including DMN3732UFB4Q-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DMN3732UFB4Q-7B requirements.
6.How does Aetrix verify that DMN3732UFB4Q-7B is sourced from the original manufacturer or authorized distributors?
All DMN3732UFB4Q-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 DMN3732UFB4Q-7B meets industry standards.
7.What is the process for return or replacement of DMN3732UFB4Q-7B?
All DMN3732UFB4Q-7B units undergo pre-shipment inspection (PSI). If there is an issue with DMN3732UFB4Q-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 DMN3732UFB4Q-7B part is unused and in its original packaging.
Return procedure for DMN3732UFB4Q-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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