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Texas Instruments LM5112MYX/NOPB
- Part No.:
- LM5112MYX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM5112MYX/NOPB.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,458
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Product details
Overview
LM5112MYX/NOPB from Texas Instruments is a high-speed, single-channel MOSFET gate driver optimized for low-side switching in high-frequency DC/DC and AC/DC power supplies. It delivers 7-A peak sink and 3-A peak source current, achieves 14-ns rise and 12-ns fall times into 2-nF load, and operates from 3.5 V to 14 V supply with dedicated IN_REF ground for split- or single-supply configurations - enabling robust gate drive in solar microinverters and motor drives.
For engineers reviewing the LM5112MYX/NOPB datasheet, LM5112MYX/NOPB pinout, LM5112MYX/NOPB application, or LM5112MYX/NOPB equivalent, key selection criteria include its compound CMOS/bipolar output stage for stable current over temperature, UVLO with 2.4–3.5-V activation and 230-mV hysteresis, dual inverting/non-inverting inputs, and WSON-6 (3 mm × 3 mm) thermally enhanced package.
Technical Context
The LM5112MYX/NOPB integrates a compound output stage combining MOS and bipolar transistors in parallel: the MOS device ensures rail-to-rail swing (VCC to VEE), while the bipolar device delivers high peak current during the Miller plateau region. This architecture reduces output current variation across –40°C to 125°C junction temperature and 3.5–14 V supply range.
It features dual logic inputs (IN and INB) supporting both inverting and non-inverting operation via pin-strapping - IN pulled to VCC and INB tied to IN_REF for non-inverting mode; INB used as active input and IN pulled to VCC for inverting mode. The dedicated IN_REF pin enables level shifting between controller logic ground and negative VEE supply, allowing true negative gate drive down to VEE = IN_REF −14 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Sink Current | 7 A - drives MOSFET gate rapidly through Miller plateau, minimizing conduction losses in high-frequency switching. |
| Peak Source Current | 3 A - enables fast turn-off of low-side MOSFETs without external pull-down components. |
| Rise/Fall Time | 14 ns / 12 ns @ 2-nF load - reduces switching transition time, directly lowering power loss in hard-switched topologies. |
| Propagation Delay | 25 ns typical (low-to-high and high-to-low) - supports >10 MHz effective control bandwidth for precise PWM timing. |
| UVLO Threshold | 2.4–3.5 V (rising), 230-mV hysteresis - prevents partial turn-on of power MOSFETs during brown-out, avoiding shoot-through or thermal runaway. |
| Supply Range | 3.5 V to 14 V (VCC – IN_REF) - accommodates 5-V, 12-V, and 15-V gate drive rails while maintaining TTL-compatible input thresholds. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.3 V - compatible with standard 3.3-V and 5-V controllers without level shifters. |
Pinout & Package
LM5112MYX/NOPB uses the PowerPAD-enabled WSON-6 package (3.00 mm × 3.00 mm), with exposed die pad internally bonded to VEE for low thermal impedance. The 6-pin layout places critical high-current paths (OUT, VCC, VEE) and reference grounds (IN_REF) to minimize loop inductance in high-di/dt gate drive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Non-inverting input | TTL-compatible control input; must be pulled to VCC when unused to prevent floating-induced oscillation. |
| 2 - VEE | Power ground / negative rail | Return path for output current; connects to MOSFET source or negative bias supply; ties to exposed pad for thermal conduction. |
| 3 - VCC | Positive supply input | Gate drive rail (3.5–14 V); requires local 100-nF ceramic decoupling to VEE placed <1 mm from pin. |
| 4 - OUT | Gate drive output | Push-pull totem pole output swinging rail-to-rail (VEE to VCC); capable of 7-A sink / 3-A source pulses. |
| 5 - IN_REF | Input reference ground | Logic ground reference for IN/INB; separates control domain from power domain - enables split-supply operation when VEE is negative relative to IN_REF. |
| 6 - INB | Inverting input | Active-low control input; must be connected to IN_REF when unused to avoid false triggering. |
Key Features
| Feature | Design Value |
|---|---|
| Compound CMOS/Bipolar Output Stage | Combines MOS rail-to-rail swing with bipolar high-current capability at Miller plateau - stabilizes gate drive performance across voltage and temperature. |
| Dual Input Configuration (IN/INB) | Single device supports both inverting and non-inverting logic polarity via pin-strapping - eliminates need for external inverters or second driver IC. |
| Dedicated IN_REF Ground Pin | Enables independent grounding of logic inputs and power outputs - supports negative VGS biasing for enhanced MOSFET off-state reliability. |
| Undervoltage Lockout (UVLO) | Disables output below 2.4–3.5 V VCC–IN_REF differential with 230-mV hysteresis - prevents erratic switching during startup or brown-out conditions. |
| Thermally Enhanced WSON-6 Package | 3 mm × 3 mm footprint with exposed thermal pad bonded to VEE - achieves RθJA = 40°C/W with proper PCB copper pour, enabling high-power density designs. |
Applications
| Solar Microinverter Gate Drive | High-Frequency DC/DC Converter |
|---|---|
Use Scenario: Driving low-side N-channel MOSFETs in interleaved boost stages of residential solar microinverters operating at 100–300 kHz. IC Role / Device Role / Timing Role: High-current gate driver translating PWM signals from digital controller to MOSFET gate, managing Miller capacitance during fast transitions. Use Value: 7-A sink current ensures sub-20-ns turn-off even with 3-nF total gate charge, reducing switching loss by >15% versus 2-A drivers at 250 kHz. |
Use Scenario: Gate driving in 48-V input, 12-V output synchronous buck converters for telecom and server POL applications. IC Role / Device Role / Timing Role: Low-side driver delivering precise, fast-edged gate waveforms to minimize dead-time losses and improve light-load efficiency. Use Value: 14-ns rise time and 25-ns propagation delay enable accurate timing alignment with high-side driver, supporting <50-ns dead-time control. |
| AC/DC PFC Front-End | Solenoid & Motor Driver Interface |
Use Scenario: Driving the low-side switch in continuous conduction mode (CCM) boost PFC stages handling 500-W–2-kW loads. IC Role / Device Role / Timing Role: Robust gate buffer isolating MCU/PWM IC from high-voltage, high-current power stage while sustaining 100-kHz+ switching. Use Value: UVLO with 230-mV hysteresis prevents gate drive dropout during line sags, maintaining stable PFC operation under 10% AC dips. |
Use Scenario: Controlling industrial solenoids and brushed DC motors requiring rapid on/off cycling with high peak current pulses. IC Role / Device Role / Timing Role: High-current interface between microcontroller GPIO and inductive load, providing fast turn-on to overcome coil inductance. Use Value: 7-A sink capability allows direct drive of 100-mH, 24-V solenoids with <100-µs response time - eliminating need for discrete transistor buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar MOSFET gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC27524ADRMR | 4-A sink / 4-A source, dual-channel, no IN_REF pin, fixed non-inverting only, SO-8 package. | Lacks split-supply support and negative VGS capability; suited for dual low-side or half-bridge where shared ground is acceptable. | Select when dual-channel drive is required and system ground topology precludes separate IN_REF/VEE routing. |
| LM5113MYX/NOPB | High-side + low-side dual driver, bootstrap-based, 5-A sink/source, 8-pin WSON, no IN_REF pin. | Designed for floating high-side drive in half-bridge configurations; not suitable for standalone negative-bias gate drive. | Choose for synchronous buck or LLC resonant converters needing integrated high/low-side timing coordination. |
Compared with UCC27524ADRMR and LM5113MYX/NOPB, LM5112MYX/NOPB uniquely supports true negative gate drive via isolated IN_REF/VEE grounds and delivers highest sink current (7 A) in a single-channel, space-constrained WSON-6 package - making it optimal for high-efficiency, high-density low-side-only applications demanding robust off-state control.
Availability
LM5112MYX/NOPB is available at Aetrix Electronics and suitable for solar microinverters, high-frequency DC/DC converters, and AC/DC PFC front-ends requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production ramp.
Supply support for LM5112MYX/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 leader designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and communications markets.
The LM5112MYX/NOPB belongs to TI's high-performance gate driver product line, engineered specifically for high-efficiency, high-frequency power conversion systems where fast, reliable low-side MOSFET switching is critical.
FAQ
What is the maximum allowable voltage difference between VCC and IN_REF for LM5112MYX/NOPB?
The LM5112MYX/NOPB specifies a maximum VCC–IN_REF differential of 14 V per Absolute Maximum Ratings. Operation beyond this risks permanent damage. For reliable functionality, the recommended operating range is 3.5 V to 14 V, with UVLO activating below ~2.8 V. Always maintain ≥100-mV margin below 14 V in production designs to accommodate transients.
Can LM5112MYX/NOPB drive a MOSFET with negative gate voltage (e.g., VEE = –5 V relative to IN_REF)?
Yes. LM5112MYX/NOPB supports negative VGS biasing: connect IN_REF to controller ground and VEE to a negative supply up to 14 V below VCC. This configuration enables robust MOSFET turn-off by pulling the gate below source potential - critical for preventing unintended conduction in high-noise industrial environments.
Does LM5112MYX/NOPB require external pull-up or pull-down resistors on IN or INB pins?
Yes - unused inputs must be terminated. Pull IN to VCC (via ≤10-kΩ resistor) when using INB; tie INB to IN_REF (via ≤10-kΩ resistor) when using IN. Floating inputs risk spurious output transitions due to noise coupling, especially in high-di/dt layouts. TI's datasheet explicitly mandates these connections for stable operation.
What thermal performance can be expected from LM5112MYX/NOPB in a standard 2-layer PCB design?
With a minimum 100-mm² copper pour connected to the exposed thermal pad (VEE), LM5112MYX/NOPB achieves RθJA ≈ 45–50°C/W on a 2-layer board. At 0.138 W dissipation (per TI's 300-kHz/30-nC example), junction-to-ambient rise is ~6.9°C - well within the –40°C to 125°C operating range. Use thermal vias (≥6× 0.3-mm) under the pad for best results.
Is LM5112MYX/NOPB pin-compatible with other members of the LM511x family, such as LM5113MYX/NOPB?
No. LM5112MYX/NOPB (WSON-6) and LM5113MYX/NOPB (WSON-8) have different pin counts, functions, and footprints. LM5112MYX/NOPB lacks high-side drive circuitry and bootstrap components present in LM5113MYX/NOPB. They are not interchangeable without PCB redesign - LM5112MYX/NOPB is strictly a single low-side driver.
LM5112MYX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 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 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:
- 8-HVSSOP
LM5112MYX/NOPB FAQ
1.How can I place an order for LM5112MYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5112MYX/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 LM5112MYX/NOPB reliable?
The price and inventory of LM5112MYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5112MYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM5112MYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5112MYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5112MYX/NOPB?
LM5112MYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5112MYX/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 LM5112MYX/NOPB?
For technical support, including LM5112MYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5112MYX/NOPB requirements.
6.How does Aetrix verify that LM5112MYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5112MYX/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 LM5112MYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5112MYX/NOPB?
All LM5112MYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5112MYX/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 LM5112MYX/NOPB part is unused and in its original packaging.
Return procedure for LM5112MYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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