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Diodes Incorporated FMMT718TA
- Part No.:
- FMMT718TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
FMMT718TA.pdf
- Description:
- TRANS PNP 20V 1.5A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:13,794
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Product details
Overview
FMMT718TA from Diodes Incorporated is a 20V PNP silicon low-saturation transistor in SOT23 package, delivering -1.5A continuous collector current, < -200mV VCE(sat) at -1A, and 97mΩ equivalent on-resistance. It serves as a high-efficiency power switch in gate-driving circuits for MOSFETs and IGBTs, DC-DC converters, and battery charging systems.
For engineers reviewing the FMMT718TA datasheet, FMMT718TA pinout, FMMT718TA application, or FMMT718TA equivalent, key selection criteria include its -20V VCEO, -6A peak pulse capability, thermal resistance of 155°C/W (short-duration), hFE down to 15 at -6A, and AEC-Q101-compliant automotive variant (FMMT718Q) availability.
Technical Context
This PNP bipolar junction transistor operates with emitter-grounded configuration and supports fast switching via 68ns turn-on and 270ns turn-off times under -1A load. Its low RCE(SAT) of 97mΩ and characterized hFE up to -6A enable stable current gain hold-up in high-current saturation mode.
The device features -7V VEBO, 4kV HBM ESD rating, and operates across -55°C to +150°C. Thermal derating begins above 25°C ambient, with 806mW max power dissipation at t ≤ 5 sec and 625mW steady-state on FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -20V - Maximum safe collector-emitter voltage before breakdown in common-emitter configuration |
| IC (continuous) | -1.5A - Sustained DC current handling without thermal runaway on standard PCB |
| VCE(sat) | < -200mV @ -1A - Enables < 200mW conduction loss per switch in high-duty-cycle power stages |
| RCE(SAT) | 97mΩ - Low equivalent on-resistance supports efficient low-voltage switching below 5V rails |
| hFE | 15–475 - Gain range validated from -10mA to -6A, ensuring predictable base drive sizing |
| fT | 150–180MHz - Supports switching beyond 10MHz in optimized gate-drive applications |
| ESD HBM | 4,000V - Robust handling during board assembly and system integration |
Pinout & Package
Package: SOT23 (Type DN), surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal | Connected to higher potential rail; carries full load current in PNP switch configuration |
| 2 (Base) | Control input | Receives negative bias current to saturate transistor; requires ≥ -50mA for -1.5A IC |
| 3 (Collector) | Current sink terminal | Connected to load; voltage swing referenced to emitter; handles reverse recovery in inductive switching |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | VCE(sat) < -200mV at -1A enables sub-200mW conduction loss in compact power switches |
| High peak pulse current | -6A ICM supports surge handling in motor gate drives and transient-loaded DC-DC stages |
| Thermal performance | 155°C/W RθJA (t ≤ 5 sec) allows short-burst operation up to 806mW without heatsink |
| Automotive qualification path | FMMT718Q variant qualified to AEC-Q101 with PPAP support and IATF 16949 manufacturing |
| Green compliance | Halogen- and antimony-free, RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Gate-Drive Switching | DC-DC Converter Primary Switch |
|---|---|
Use Scenario: Driving gates of N-channel MOSFETs in half-bridge inverters and synchronous rectifiers. IC Role / Device Role / Timing Role: PNP active pull-down switch providing fast, low-loss gate discharge path. Use Value: 68ns ton/270ns toff and 97mΩ RCE(SAT) minimize dead-time losses and shoot-through risk. | Use Scenario: High-side switch in buck or SEPIC converter topologies operating below 20V input. IC Role / Device Role / Timing Role: Low-VCEO PNP switch controlling energy transfer into inductor/capacitor network. Use Value: -20V VCEO and -200mV VCE(sat) ensure efficiency >92% at 1A output with minimal thermal rise. |
| Battery Charging Control | Load Switch for Industrial Sensors |
Use Scenario: Enabling/disabling charging current paths in Li-ion linear or switch-mode chargers. IC Role / Device Role / Timing Role: Precision current-controlled series pass element with tight VCE(sat) tolerance. Use Value: Stable hFE down to -6A and ±20mV VCE(sat) variation enable accurate charge current regulation. | Use Scenario: Power gating for 3.3V/5V sensor modules in programmable logic controllers. IC Role / Device Role / Timing Role: Low-leakage, high-reliability discrete load switch replacing integrated PMICs. Use Value: -100nA ICES and -55°C to +150°C operating range ensure long-term stability in unattended field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP low-saturation transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25050DFH | -20V VCEO, -1.2A IC, VCE(sat) = -150mV @ -1A, SOT23-3L | Lower peak current (-3.5A ICM) and no AEC-Q101 variant | Preferred where space-constrained layout favors same footprint but automotive compliance is not required |
| DMT3005LKQ | -30V VCEO, -1.5A IC, VCE(sat) = -220mV @ -1A, SOT23-3 | Higher voltage rating but higher saturation loss; no hFE characterization above -1A | Chosen when system margin demands >20V blocking but can tolerate ~10% higher conduction loss |
Compared with ZXTN25050DFH and DMT3005LKQ, FMMT718TA uniquely combines -6A peak pulse capability, hFE validation to -6A, and direct AEC-Q101-compatible derivative (FMMT718Q), making it optimal for automotive gate drivers and industrial power stages requiring robust transient response.
Availability
FMMT718TA is available at Aetrix Electronics and suitable for gate-driving MOSFETs/IGBTs, DC-DC converter primary switches, and battery charging control circuits requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for FMMT718TA 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 the Americas.
FMMT718TA belongs to Diodes' FMMT series of low-saturation bipolar transistors, engineered specifically for high-efficiency power switching in space-constrained, thermally demanding applications such as automotive gate drivers and portable power supplies.
FAQ
What is the maximum allowable base current for FMMT718TA?
The absolute maximum base current is -500mA, but typical operation uses -10mA to -50mA depending on collector load. At -1.5A IC, the datasheet specifies -50mA IB to ensure deep saturation with VCE(sat) ≤ -220mV. Exceeding -50mA provides no significant VCE(sat) improvement and increases driver-stage power loss.
Does FMMT718TA require a heatsink in standard SOT23 mounting?
No heatsink is required for continuous operation at ≤625mW on a 25mm × 25mm FR4 PCB with 1 oz copper. The 200°C/W RθJA (steady-state) limits junction temperature to ≤100°C at 25°C ambient. For pulsed loads up to 806mW (t ≤ 5 sec), thermal mass of the PCB and leads suffices without additional cooling.
How does FMMT718TA compare to its complementary NPN type FMMT618?
FMMT618 shares identical SOT23 packaging, thermal specs, and 20V ratings but offers +1.5A IC, +200mV VCE(sat) at +1A, and matching hFE curves. Their symmetrical parameters enable balanced push-pull gate drivers and H-bridge control stages where both polarities must switch with matched timing and loss characteristics.
Is FMMT718TA suitable for automotive applications?
The standard FMMT718TA is not AEC-Q101 qualified, but Diodes offers the FMMT718Q variant-identical electrically and mechanically-with full AEC-Q101 stress testing, PPAP documentation, and IATF 16949 manufacturing. Customers requiring automotive qualification must specify FMMT718Q; FMMT718TA is intended for industrial and commercial use only.
FMMT718TA 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:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 1.5 A
- Voltage - Collector Emitter Breakdown (Max):
- 20 V
- Vce Saturation (Max) @ Ib, Ic:
- 220mV @ 50mA, 1.5A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 100mA, 2V
- Power - Max:
- 625 mW
- Frequency - Transition:
- 180MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
FMMT718TA FAQ
1.How can I place an order for FMMT718TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FMMT718TA 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 FMMT718TA reliable?
The price and inventory of FMMT718TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT718TA is usually 5 days.
3.What payment methods are accepted for FMMT718TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT718TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FMMT718TA?
FMMT718TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FMMT718TA 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 FMMT718TA?
For technical support, including FMMT718TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT718TA requirements.
6.How does Aetrix verify that FMMT718TA is sourced from the original manufacturer or authorized distributors?
All FMMT718TA 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 FMMT718TA meets industry standards.
7.What is the process for return or replacement of FMMT718TA?
All FMMT718TA units undergo pre-shipment inspection (PSI). If there is an issue with FMMT718TA, 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 FMMT718TA part is unused and in its original packaging.
Return procedure for FMMT718TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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