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Diodes Incorporated MMBT3906LP-7
- Part No.:
- MMBT3906LP-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- 3-UFDFN
- Datasheet:
-
MMBT3906LP-7.pdf
- Description:
- TRANS PNP 40V 0.2A X1-DFN1006-3
- Quantity:
- Payment:
- Shipping:
Inventory:66,006
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Product details
Overview
MMBT3906LP-7 from Diodes Incorporated is a PNP small-signal transistor in X1-DFN1006-3 package, rated for -40V VCEO, -200mA IC, and 1000mW power dissipation at optimized board layout. It delivers hFE = 100–300 at IC = -10mA, VCE = -1.0V, with VCE(sat) ≤ -0.25V and fT = 300MHz, used in compact load switching and biasing circuits for portable power management.
For engineers reviewing the MMBT3906LP-7 datasheet, MMBT3906LP-7 pinout, MMBT3906LP-7 application, or MMBT3906LP-7 equivalent, key selection criteria include its ultra-small 0.60mm² footprint, 0.5mm height, -40V breakdown rating, high-current capability, and complementary pairing with MMBT3904LP in space-constrained DC-DC feedback and LED driver stages.
Technical Context
This PNP transistor operates in linear and saturated switching modes with verified VCE(sat) ≤ -0.25V at IC = -10mA/IB = -1.0mA and VBE(sat) = -0.65 to -0.85V under same conditions. Its fT = 300MHz and hfe = 100–400 support high-speed digital switching up to ~10MHz edge rates.
Thermal performance is defined for two mounting conditions: RθJA = 310°C/W on minimal pad layout and 120°C/W with 25mm × 25mm exposed collector copper. ESD robustness includes 4kV HBM and 200V MM ratings per JEDEC JESD22-A114/A115.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -40V - Ensures safe operation in 24V rail switching and automotive load control without breakdown. |
| IC | -200mA - Supports driving medium-current loads like relays, LEDs, or gate resistors in discrete logic interfaces. |
| PD | 1000mW (with thermal pad) - Enables sustained conduction in compact PCB layouts when mounted on ≥25mm² copper. |
| hFE | 100–300 @ IC = -10mA - Provides predictable current amplification for stable bias networks in amplifier stages. |
| fT | 300MHz - Validates use in fast-switching applications such as PWM dimming control and pulse generation. |
| VCE(sat) | ≤ -0.25V @ IC = -10mA - Minimizes conduction loss and self-heating in high-duty-cycle switching nodes. |
Pinout & Package
Package: X1-DFN1006-3 - 0.60mm² footprint, 0.5mm profile, molded green plastic (UL 94V-0), NiPdAu-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal | Connected to higher potential rail; defines reference for base drive and saturation voltage measurement. |
| 2 (Base) | Control input | Receives negative bias current to turn on; requires series resistor to limit IB and ensure hFE-based gain stability. |
| 3 (Collector) | Current sink terminal | Connected to load and ground return path; thermally coupled to exposed pad for enhanced power handling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact footprint | 0.60mm² area - Reduces PCB real estate by 13× vs. SOT-23, enabling dense power stage integration. |
| Low-profile package | 0.5mm height - Allows stacking under shields or in slim handheld enclosures without mechanical interference. |
| High ESD tolerance | 4kV HBM - Improves manufacturing yield and field reliability in unshielded assembly environments. |
| Lead-free & green compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - Meets automotive and industrial RoHS 3 and ELV requirements. |
| Complementary NPN pair | MMBT3904LP - Enables matched design of push-pull drivers, differential amplifiers, and H-bridge pre-drivers. |
Applications
| LED Current Switching | DC-DC Feedback Bias |
|---|---|
Use Scenario: Driving 20–100mA indicator or status LEDs in battery-powered IoT sensors. IC Role / Device Role / Timing Role: PNP switch controlling cathode-side current path with active-low enable signal. Use Value: Low VCE(sat) minimizes forward voltage drop and extends battery life; small DFN footprint saves space on coin-cell PCBs. |
Use Scenario: Providing precise bias current to optocoupler input in isolated flyback converter feedback loops. IC Role / Device Role / Timing Role: Linear current source setting phototransistor drive level for regulation accuracy. Use Value: Tight hFE range ensures consistent current transfer ratio; thermal stability maintains regulation across -40°C to +85°C. |
| Microcontroller GPIO Expander | Automotive Door Module Load Control |
Use Scenario: Level-shifting and current boosting for 3.3V MCU GPIO pins driving 5V/12V peripherals. IC Role / Device Role / Timing Role: Discrete PNP buffer isolating MCU output from higher-voltage loads. Use Value: Fast switching (tf ≤ 75ns) supports 10kHz+ PWM control; low input capacitance avoids GPIO loading. |
Use Scenario: Controlling interior lighting, mirror heaters, or window motor relays in AEC-Q200-compliant modules. IC Role / Device Role / Timing Role: High-side load switch activated via microcontroller-driven base resistor network. Use Value: -40V VCEO withstands load dump transients; green compliance satisfies OEM material declarations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMT3005LPSQ-7 | AEC-Q101 qualified, -50V VCEO, 1.2A IC, larger DFN1608 package | Targeted at automotive body electronics requiring PPAP and extended temperature validation | Select when AEC-Q101 qualification and higher surge current capability are mandatory. |
| BC807-25,215 | SOT-23 package, -45V VCEO, -500mA IC, lower fT (100MHz) | Preferred where legacy SMT placement infrastructure exists and board height is less constrained | Choose for compatibility with existing SOT-23 tooling and cost-sensitive industrial controls. |
Compared with MMBT3906LP-7, DMT3005LPSQ-7 offers automotive-grade reliability at the expense of size and cost, while BC807-215 trades miniaturization for broader availability and lower unit price in non-space-critical designs.
Availability
MMBT3906LP-7 is available at Aetrix Electronics and suitable for LED switching, DC-DC feedback biasing, and microcontroller GPIO expansion requiring stable component supply and long-term production continuity.
Supply support for MMBT3906LP-7 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-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The MMBT3906LP belongs to Diodes' LP-series ultra-miniature transistor family, engineered specifically for space-constrained portable and automotive electronics where board area and profile are critical constraints.
FAQ
What is the maximum continuous collector current for MMBT3906LP-7?
The absolute maximum continuous collector current is -200mA at TA = +25°C with proper PCB thermal relief. Derating applies above 25°C ambient: current must be reduced by 1.6mA/°C above 25°C when mounted on minimum pad layout, or by 8.3mA/°C with full thermal pad copper.
Does MMBT3906LP-7 have automotive qualification?
MMBT3906LP-7 itself is not AEC-Q101 qualified, but Diodes offers automotive-grade variants (e.g., DMT3005LPSQ-7) in the same LP-series. The MMBT3906LP-7 meets RoHS 3, halogen-free, and green standards, and is manufactured in IATF 16949-certified facilities-enabling customer-led qualification for specific automotive programs.
How is the X1-DFN1006-3 package thermally managed during layout?
The exposed collector pad (Pin 3) must be connected to a ≥25mm² copper pour using ≥4 thermal vias (0.3mm diameter) to achieve the 120°C/W RθJA rating. For minimal-pad layouts, RθJA rises to 310°C/W, limiting usable power to ~400mW at 25°C ambient.
Can MMBT3906LP-7 replace BC856 in existing designs?
No-BC856 is a PNP in SOT-23 with -65V VCEO and -100mA IC. MMBT3906LP-7 has lower voltage rating (-40V) but higher current capacity (-200mA) and smaller footprint. Direct replacement requires verification of voltage margin and thermal performance in the target PCB layout.
MMBT3906LP-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-UFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 200 mA
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 1V
- Power - Max:
- 250 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-3
MMBT3906LP-7 FAQ
1.How can I place an order for MMBT3906LP-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBT3906LP-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 MMBT3906LP-7 reliable?
The price and inventory of MMBT3906LP-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT3906LP-7 is usually 5 days.
3.What payment methods are accepted for MMBT3906LP-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT3906LP-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBT3906LP-7?
MMBT3906LP-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBT3906LP-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 MMBT3906LP-7?
For technical support, including MMBT3906LP-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT3906LP-7 requirements.
6.How does Aetrix verify that MMBT3906LP-7 is sourced from the original manufacturer or authorized distributors?
All MMBT3906LP-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 MMBT3906LP-7 meets industry standards.
7.What is the process for return or replacement of MMBT3906LP-7?
All MMBT3906LP-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBT3906LP-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 MMBT3906LP-7 part is unused and in its original packaging.
Return procedure for MMBT3906LP-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBT3906LP-7 Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
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MMBT2222ALT1G
onsemi
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