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Texas Instruments SM74101SD/NOPB
- Part No.:
- SM74101SD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
SM74101SD/NOPB.pdf
- Description:
- IC GATE DRVR LOW-SIDE 6WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM74101SD/NOPB from Texas Instruments is a single-channel, high-speed MOSFET gate driver in a 3.0 mm × 3.0 mm WSON-6 package, delivering 7 A peak sink and 3 A peak source current with 14 ns rise / 12 ns fall times (2 nF load), enabling low-loss switching in solar microinverters and DC/DC forward converters.
For engineers reviewing the SM74101SD/NOPB datasheet, SM74101SD/NOPB pinout, SM74101SD/NOPB application, or SM74101SD/NOPB equivalent, key selection criteria include UVLO threshold (2.4–3.5 V), dual-input polarity support (IN/INB), split-supply capability (VCC to VEE up to 15 V), and thermal resistance (RθJA = 40.0 °C/W).
Technical Context
The SM74101SD/NOPB integrates a compound output stage combining MOS and bipolar transistors to maintain stable drive current across temperature and voltage variations-bipolar devices dominate Miller plateau region current delivery while MOS devices ensure rail-to-rail swing (VEE to VCC). Its level-shift architecture isolates input logic ground (IN_REF) from power ground (VEE), supporting both single-supply (IN_REF = VEE = GND) and split-supply (VEE < IN_REF) configurations.
UVLO monitors VCC–IN_REF differential (2.4–3.5 V trip, 230 mV hysteresis) to disable output during brown-out; propagation delays are tightly controlled at 25–40 ns (low-to-high/high-to-low) with TTL-compatible inputs (VIH = 2.3 V, VIL = 0.8 V) and dedicated input ground for noise immunity in high-di/dt environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 3.5 V to 14 V differential vs IN_REF - enables flexible gate drive supply design including negative bias for robust MOSFET turn-off. |
| Peak Sink/Source Current | 7 A sink / 3 A source - drives large gate capacitances rapidly to minimize conduction losses in high-frequency power stages. |
| Rise/Fall Time | 14 ns / 12 ns (2 nF load) - reduces switching transition time, directly lowering MOSFET switching losses in >300 kHz applications. |
| Propagation Delay | 25 ns typical (td1/td2) - ensures precise timing alignment between controller PWM and power switch transitions. |
| UVLO Threshold | 2.4–3.5 V (rising), 230 mV hysteresis - prevents partial turn-on of MOSFETs under marginal supply conditions, avoiding thermal runaway. |
| Input Thresholds | VIH = 2.3 V, VIL = 0.8 V - compatible with standard TTL and 3.3 V/5 V logic controllers without level-shifting circuitry. |
| Thermal Resistance | RθJA = 40.0 °C/W - achievable with exposed pad soldered to PCB copper, enabling 0.138 W dissipation with only 5.5 °C junction rise at TA = 25 °C. |
Pinout & Package
Package: WSON-6 (NGG), 3.0 mm × 3.0 mm, thermally enhanced with exposed die pad soldered to PCB for low RθJB (29.3 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Non-inverting logic input | TTL-compatible control signal; pulled up to VCC when unused; used in non-inverting mode with INB tied to IN_REF. |
| VEE (Pin 2) | Negative power supply / output return | Power ground reference for output stage; can be driven negative relative to IN_REF (up to −14 V) for enhanced MOSFET off-state robustness. |
| VCC (Pin 3) | Positive power supply | Gate drive supply input; requires local 100 nF low-ESR/ESL decoupling capacitor to VEE for peak current delivery. |
| OUT (Pin 4) | High-current gate drive output | Sinks 7 A / sources 3 A; swings rail-to-rail between VEE and VCC; connects directly to MOSFET gate. |
| IN_REF (Pin 5) | Input reference ground | Logic ground reference for IN/INB inputs; isolated from VEE to prevent noise coupling; tied to controller ground in split-supply systems. |
| INB (Pin 6) | Inverting logic input | TTL-compatible active-low control; tied to IN_REF when unused; used in inverting mode with IN pulled up to VCC. |
| Exposed Pad | Thermal & electrical ground | Internally bonded to die substrate; must be soldered to PCB copper pour for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Compound CMOS/Bipolar Output Stage | Combines MOS (rail-to-rail swing) and bipolar (high Miller-region current) devices to stabilize drive current over −40°C to +125°C and 3.5–14 V supply range. |
| Dual Polarity Inputs (IN/INB) | Enables single-device support for both active-high and active-low PWM signals-eliminates need for external inverters in multi-topology designs. |
| Dedicated IN_REF Pin | Provides galvanic separation between logic and power grounds, reducing noise coupling in isolated gate drive applications like forward converters. |
| Under-Voltage Lockout (UVLO) | Disables output when VCC–IN_REF drops below 2.8 V (typical), preventing unreliable MOSFET turn-on and ensuring safe startup/shutdown sequencing. |
| Power-Enhanced WSON-6 Package | 3.0 mm × 3.0 mm footprint with exposed thermal pad achieves RθJA = 40.0 °C/W-matching SOT-23-6 area while delivering >2× the current of legacy drivers. |
Applications
| Solar Microinverter | AC/DC Switch-mode Power Supply |
|---|---|
|
Use Scenario: Driving low-side MOSFETs in interleaved half-bridge stages of residential solar microinverters operating at 100–300 kHz. IC Role / Device Role: High-speed gate driver interfacing between isolated PWM controller (e.g., LM5025) and power MOSFET, handling fast transient currents during zero-voltage switching transitions. Use Value: 7 A sink current ensures rapid discharge of MOSFET gate charge, minimizing dead-time losses and improving conversion efficiency above 96%. |
Use Scenario: Gate driving primary-side MOSFETs in high-density AC/DC adapters using active-clamp forward topology. IC Role / Device Role: Low-side driver receiving isolated PWM signals via transformer-coupled interface, providing rail-to-rail (VEE to VCC) output swing with minimal propagation delay. Use Value: 25 ns typical propagation delay and 14 ns rise time enable tight timing control for active-clamp timing, reducing voltage overshoot and EMI. |
| DC/DC Forward Topology Power Supply | Solenoid and Motor Drivers |
|
Use Scenario: Primary-side gate drive in industrial 48 V–12 V DC/DC forward converters requiring high reliability and thermal resilience. IC Role / Device Role: Single-channel driver operating in non-inverting mode (IN-controlled), with IN_REF tied to controller ground and VEE connected to MOSFET source. Use Value: Split-ground architecture (IN_REF/VEE separation) prevents ground bounce from corrupting PWM signals during high di/dt switching events. |
Use Scenario: Driving N-channel MOSFETs in 24 V solenoid control modules and brushed DC motor H-bridges in factory automation equipment. IC Role / Device Role: Robust gate driver handling repetitive 10–100 A inductive kickback, leveraging UVLO and thermal design margin for continuous duty-cycle operation. Use Value: 15 V absolute max VCC–VEE rating and 125°C max junction temperature support sustained operation in enclosed, convection-cooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar MOSFET gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5110-1M/NOPB | Lower peak current (4 A sink / 2 A source); fixed non-inverting-only input; no IN_REF pin - requires external level shift for split-supply use. | Better suited for space-constrained 5 V logic systems where 7 A drive is unnecessary; lacks dual-input flexibility and negative bias capability. | Select when cost and board area are prioritized over peak current and split-supply operation. |
| UCC27517DBVR | Higher speed (13 ns rise), but lower sink current (4.5 A); no UVLO; single supply only (no VEE pin); 5-pin SOT-23 package. | Ideal for high-frequency (>1 MHz) GaN FET drivers where ultra-fast edges outweigh current demand; not suitable for negative gate bias or high-power MOSFETs. | Select for GaN-based SMPS where sub-15 ns rise time is critical and UVLO is managed externally. |
Compared with LM5110-1M/NOPB and UCC27517DBVR, the SM74101SD/NOPB uniquely combines 7 A sink current, dual-polarity inputs, dedicated IN_REF/VEE separation, and integrated UVLO in a thermally optimized 6-pin WSON - making it the only option among the three qualified for renewable-energy-grade, negative-bias-capable, high-reliability MOSFET drive.
Availability
SM74101SD/NOPB is available at Aetrix Electronics and suitable for solar microinverters, AC/DC switch-mode power supplies, and DC/DC forward topology power supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SM74101SD/NOPB 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability industrial ICs.
The SM74101SD/NOPB belongs to TI's high-performance gate driver product line, designed specifically for high-efficiency, high-frequency power conversion systems in renewable energy, industrial power, and motor control applications.
FAQ
What is the maximum allowable voltage difference between VCC and VEE for the SM74101SD/NOPB?
The SM74101SD/NOPB supports a maximum VCC to VEE differential of 15 V, as specified in its Absolute Maximum Ratings table. This allows operation with VEE set up to −14 V relative to IN_REF in split-supply configurations, provided VCC–IN_REF remains within 3.5–14 V. Exceeding 15 V risks permanent device damage.
Does the SM74101SD/NOPB support both inverting and non-inverting logic inputs simultaneously?
No - the SM74101SD/NOPB supports either inverting or non-inverting operation per application, selected by which input (IN or INB) is actively driven. In non-inverting mode, IN controls OUT and INB is tied to IN_REF; in inverting mode, INB controls OUT and IN is pulled up to VCC. Both inputs are never active concurrently.
How does the SM74101SD/NOPB achieve stable drive current across temperature and voltage variations?
The SM74101SD/NOPB uses a compound output stage with parallel MOS and bipolar transistors: the bipolar device delivers high peak current during the Miller plateau region where MOSFET VGS is most sensitive to temperature, while the MOS device provides consistent rail-to-rail swing. This hybrid architecture reduces total output current variation over −40°C to +125°C and 3.5–14 V supply range.
What is the purpose of the IN_REF pin on the SM74101SD/NOPB, and how should it be connected?
The IN_REF pin serves as the dedicated reference ground for the logic input buffers (IN and INB), electrically isolated from the power ground (VEE). In single-supply operation, IN_REF is tied to VEE (system power ground); in split-supply operation, IN_REF connects to controller ground while VEE connects to a separate negative bias rail - preventing noise coupling between control and power domains.
Can the SM74101SD/NOPB drive high-side MOSFETs directly?
No - the SM74101SD/NOPB is a low-side gate driver only, with output referenced to VEE. It cannot float its output above the source potential of a high-side MOSFET. For high-side drive, it must be paired with a level-shifting circuit (e.g., transformer or bootstrap diode/capacitor network) or used in conjunction with a dedicated high-side driver such as the LM5109B.
SM74101SD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel, P-Channel MOSFET
- Voltage - Supply:
- 3.5V ~ 14V
- Logic Voltage - VIL, VIH:
- 0.8V, 2.3V
- Current - Peak Output (Source, Sink):
- 3A, 7A
- Input Type:
- Inverting, Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 14ns, 12ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
SM74101SD/NOPB FAQ
1.How can I place an order for SM74101SD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for SM74101SD/NOPB 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 SM74101SD/NOPB reliable?
The price and inventory of SM74101SD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM74101SD/NOPB is usually 5 days.
3.What payment methods are accepted for SM74101SD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM74101SD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM74101SD/NOPB?
SM74101SD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM74101SD/NOPB 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 SM74101SD/NOPB?
For technical support, including SM74101SD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM74101SD/NOPB requirements.
6.How does Aetrix verify that SM74101SD/NOPB is sourced from the original manufacturer or authorized distributors?
All SM74101SD/NOPB 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 SM74101SD/NOPB meets industry standards.
7.What is the process for return or replacement of SM74101SD/NOPB?
All SM74101SD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with SM74101SD/NOPB, 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 SM74101SD/NOPB part is unused and in its original packaging.
Return procedure for SM74101SD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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