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Nexperia USA Inc. BUK7K45-100EX
- Part No.:
- BUK7K45-100EX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- FET, MOSFET Arrays
- Package:
- SOT-1205, 8-LFPAK56
- Datasheet:
-
BUK7K45-100EX.pdf
- Description:
- MOSFET 2N-CH 100V 21.4A LFPAK56D
- Quantity:
- Payment:
- Shipping:
Inventory:2,380
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Product details
Overview
BUK7K45-100EX from Nexperia is a dual N-channel standard-level MOSFET in LFPAK56D (SOT1205) package, rated for 100 V drain-source voltage, 37.6 mΩ RDS(on) at 10 VGS/25 °C, and qualified to AEC-Q101 for automotive use. It delivers 21.4 A continuous drain current at Tmb = 25 °C and supports thermally demanding applications up to 175 °C junction temperature - deployed in transmission control and high-reliability 12–48 V automotive power switching.
For engineers reviewing the BUK7K45-100EX datasheet, BUK7K45-100EX pinout, BUK7K45-100EX application, or BUK7K45-100EX equivalent, key selection criteria include its dual-channel layout, true standard-level gate drive (VGS(th) > 1 V at 175 °C), repetitive avalanche rating, and LFPAK56D thermal performance with Rth(j-mb) = 2.84 K/W.
Technical Context
This device integrates two independent N-channel TrenchMOS transistors in a single LFPAK56D package, sharing no internal connection between channels - enabling fully isolated high-side or low-side switching per FET. Each channel features identical static and dynamic characteristics, including matched RDS(on), QGD = 9.7 nC, and Ciss = 1150–1533 pF.
Its AEC-Q101 qualification confirms robustness under automotive stress conditions: 175 °C continuous operation, 46 mJ non-repetitive avalanche energy, and 260 °C peak soldering temperature tolerance. The standard-level gate enables direct drive from 3.3 V/5 V microcontrollers without level-shifting, while maintaining VGS(th) ≥ 1 V even at maximum junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 100 V - Maximum blocking voltage for 12/24/48 V automotive bus systems with margin against load-dump transients. |
| RDS(on) | 37.6 mΩ @ VGS = 10 V, ID = 5 A, Tj = 25 °C - Enables <1.9 W conduction loss at 20 A, critical for thermally constrained modules. |
| ID (continuous) | 21.4 A @ Tmb = 25 °C - Sustains high-current motor/solenoid loads with PCB-mount thermal management. |
| Ptot | 53 W @ Tmb = 25 °C - High power density enabled by low Rth(j-mb) = 2.84 K/W to mounting base. |
| QGD | 9.7 nC - Low gate-drain charge minimizes Miller-induced switching instability in hard-switched DC-DC or motor phases. |
| Tj max | 175 °C - Supports operation in engine bay or transmission control units without derating below ambient extremes. |
| Avalanche energy | 46 mJ (non-repetitive) - Withstands unclamped inductive turn-off events in solenoid or relay drivers without failure. |
Pinout & Package
Package: LFPAK56D (SOT1205), 8-lead plastic surface-mount package with exposed copper mounting base for enhanced thermal transfer. Dimensions: 4.7 × 5.3 × 1.0 mm (L × W × H), with 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | S1 | Source terminal of FET1 - referenced to local ground path for first channel; electrically isolated from S2. |
| 2 | G1 | Gate terminal of FET1 - accepts standard-level logic drive; requires external gate resistor for EMI control. |
| 3 | S2 | Source terminal of FET2 - independent return path for second channel; not internally tied to S1. |
| 4 | G2 | Gate terminal of FET2 - fully decoupled from G1; enables independent PWM or on/off control per channel. |
| 5, 6 | D2 | Drain terminals of FET2 - paralleled pins reduce inductance and resistance for high-current output routing. |
| 7, 8 | D1 | Drain terminals of FET1 - paralleled pins support high-current switching with minimized thermal hotspot risk. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent N-channel topology | Enables space-efficient dual-load control (e.g., H-bridge half-bridge + brake, or dual solenoid drivers) without cross-conduction risk. |
| AEC-Q101 qualification | Validated for automotive-grade reliability: vibration, temperature cycling, and humidity testing per JEDEC standards. |
| Repetitive avalanche rated | Guarantees safe operation under repeated inductive switching stress - eliminates need for external snubbers in many 24 V systems. |
| True standard-level gate | VGS(th) ≥ 1 V at 175 °C ensures turn-on margin with 3.3 V MCU outputs even under worst-case thermal conditions. |
| LFPAK56D thermal performance | Rth(j-mb) = 2.84 K/W enables >30 W dissipation on 1-in² 2-oz copper - outperforms SO-8 and Power-SO8 alternatives. |
Applications
| Transmission Control Module | Engine Start-Stop Solenoid Driver |
|---|---|
Use Scenario: Precise timing and current control of hydraulic pressure valves and shift actuators in automatic transmissions. IC Role / Device Role / Timing Role: Dual-channel power switch driving two independent solenoids - one for pressure modulation, one for clutch engagement. Use Value: Matched RDS(on) and thermal tracking ensure synchronized actuation; 175 °C rating sustains operation during extended gear-shift cycles. |
Use Scenario: High-reliability 12 V solenoid activation for starter motor engagement/disengagement in start-stop systems. IC Role / Device Role / Timing Role: Low-side switch controlling solenoid coil current with fast turn-off to prevent contact welding. Use Value: 46 mJ avalanche rating absorbs back-EMF without clamping diodes; QGD = 9.7 nC enables clean 10 µs turn-off for precise timing. |
| 48 V Mild Hybrid DC-DC Converter | Electric Power Steering (EPS) Motor Phase Switch |
Use Scenario: High-efficiency synchronous rectification in bidirectional 48 V–12 V DC-DC converters for mild hybrid architectures. IC Role / Device Role / Timing Role: Dual N-channel used as synchronous rectifier pair in buck-boost stage, replacing Schottky diodes. Use Value: 37.6 mΩ RDS(on) cuts conduction losses by >60% vs. diode solution; LFPAK56D thermal design supports 500 kHz switching. |
Use Scenario: High-current phase switching in 3-phase brushless EPS motor inverters requiring compact, rugged power stages. IC Role / Device Role / Timing Role: One BUK7K45-100EX per half-bridge leg (e.g., high-side + low-side FETs per phase). Use Value: Dual-device integration reduces PCB area by 35% vs. discrete SO-8 MOSFETs; 21.4 A rating supports 15 A RMS motor phase current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel automotive MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STL220N6F7 | 60 V rating, lower RDS(on) (2.2 mΩ), but only single-channel in PowerFLAT 5x6 package. | Requires two devices for dual functionality; lacks integrated dual layout and AEC-Q101 avalanche validation. | Select when 60 V system voltage suffices and board space allows separate placement of two FETs. |
| ON Semiconductor NTMFS5C675NL | 60 V, 3.2 mΩ, single-channel PowerTrench® 5x6; AEC-Q101 qualified but no repetitive avalanche rating. | Not suitable for unclamped inductive loads without external protection; higher gate charge (QG = 32 nC) slows switching. | Prefer for low-loss 60 V DC-DC where avalanche immunity is secondary and gate drive strength is abundant. |
Compared with STL220N6F7 and NTMFS5C675NL, BUK7K45-100EX uniquely combines 100 V capability, dual-channel integration, AEC-Q101-compliant repetitive avalanche, and standard-level gate drive - making it the only drop-in solution for thermally constrained, safety-critical 12–48 V automotive switches requiring single-package redundancy and robustness.
Availability
BUK7K45-100EX is available at Aetrix Electronics and suitable for automotive transmission control, engine start-stop systems, 48 V mild hybrid DC-DC conversion, and electric power steering motor drives requiring stable component supply across multi-year vehicle production lifecycles.
Supply support for BUK7K45-100EX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for automotive, industrial, and computing applications.
BUK7K45-100EX belongs to Nexperia's AEC-Q101-qualified TrenchMOS automotive power portfolio, engineered specifically for high-temperature, high-reliability power switching in engine, chassis, and body control modules.
FAQ
Is BUK7K45-100EX pin-compatible with other LFPAK56D dual MOSFETs?
No - BUK7K45-100EX uses a unique 8-pin LFPAK56D (SOT1205) pinout with dual drain paralleling (pins 5/6 = D2, 7/8 = D1). Competing dual LFPAK devices like BUK7K12-40E have different pin assignments and internal connectivity, requiring PCB redesign for substitution.
What is the maximum continuous drain current at 100 °C mounting base temperature?
Per Figure 2 in the datasheet, the continuous drain current is derated to 15 A at Tmb = 100 °C with VGS = 10 V. This reflects thermal limits of the LFPAK56D package and must be verified with actual board layout and copper area.
Does BUK7K45-100EX require a gate driver IC for automotive MCU interfacing?
No - its standard-level gate (VGS(th) > 1 V at 175 °C and typical VGS(th) = 3 V at 25 °C) allows direct drive from 3.3 V or 5 V automotive MCUs. However, an external 5–10 Ω gate resistor is recommended to damp ringing and limit peak gate current.
Can both channels be used in parallel to increase current handling?
No - the datasheet specifies independent operation only. Parallel use is not characterized or guaranteed due to mismatch in RDS(on), threshold voltage, and thermal coupling. For higher current, use a single-channel 100 V MOSFET with lower RDS(on) and appropriate thermal design.
BUK7K45-100EX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOT-1205, 8-LFPAK56
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- MOSFET (Metal Oxide)
- Configuration:
- 2 N-Channel (Dual)
- FET Feature:
- -
- Drain to Source Voltage (Vdss):
- 100V
- Current - Continuous Drain (Id) @ 25°C:
- 21.4A
- Rds On (Max) @ Id, Vgs:
- 37.6mOhm @ 5A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- 25.9nC @ 10V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1533pF @ 25V
- Power - Max:
- 53W
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- LFPAK56D
BUK7K45-100EX FAQ
1.How can I place an order for BUK7K45-100EX through Aetrix?
Please submit a Request for Quotation (RFQ) for BUK7K45-100EX 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 BUK7K45-100EX reliable?
The price and inventory of BUK7K45-100EX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUK7K45-100EX is usually 5 days.
3.What payment methods are accepted for BUK7K45-100EX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUK7K45-100EX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUK7K45-100EX?
BUK7K45-100EX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUK7K45-100EX 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 BUK7K45-100EX?
For technical support, including BUK7K45-100EX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUK7K45-100EX requirements.
6.How does Aetrix verify that BUK7K45-100EX is sourced from the original manufacturer or authorized distributors?
All BUK7K45-100EX 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 BUK7K45-100EX meets industry standards.
7.What is the process for return or replacement of BUK7K45-100EX?
All BUK7K45-100EX units undergo pre-shipment inspection (PSI). If there is an issue with BUK7K45-100EX, 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 BUK7K45-100EX part is unused and in its original packaging.
Return procedure for BUK7K45-100EX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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