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Texas Instruments UCC27511DBVT
- Part No.:
- UCC27511DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- SOT-23-6
- Datasheet:
-
UCC27511DBVT.pdf
- Description:
- IC GATE DRVR LOW-SIDE SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
UCC27511DBVT from Texas Instruments is a single-channel, high-speed, low-side MOSFET/IGBT gate driver IC with asymmetrical 4-A source / 8-A sink peak drive current, 13-ns typical propagation delay, and split-output (OUTH/OUTL) configuration for independent turn-on/turn-off control - deployed in GaN-based DC-DC converters and solar power inverters.
For engineers reviewing the UCC27511DBVT datasheet, UCC27511DBVT pinout, UCC27511DBVT application, or UCC27511DBVT equivalent, key selection criteria include its 4.5–18-V VDD range, TTL/CMOS-compatible dual-input logic (IN+/IN−), UVLO protection, −40°C to 140°C junction temperature rating, and SOT-23-6 package thermal performance.
Technical Context
The UCC27511DBVT uses a shoot-through-minimized output stage with separate P-channel (OUTH) and N-channel (OUTL) drivers, enabling independent gate resistor placement for precise slew-rate tuning. Its input stage features fixed-threshold TTL/CMOS logic with 1.0–1.2 V low threshold and 2.2–2.4 V high threshold, plus 1.0-V hysteresis for noise immunity.
Internal UVLO holds outputs low below 3.7–4.65 V VDD, ensuring glitch-free startup/shutdown. Input pins tolerate up to 20 V regardless of VDD bias, supporting auxiliary supply decoupling flexibility in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 4.5 V to 18 V - supports wide-input industrial and GaN-compatible bias rails without external regulation. |
| Peak Output Current | 4 A source / 8 A sink - enables fast charging/discharging of large gate capacitances (e.g., >10 nF) at high switching frequencies. |
| Propagation Delay | 13 ns typical - minimizes timing skew in high-frequency (>1 MHz) digital power controllers. |
| Rise/Fall Time | 9 ns / 7 ns typical (1.8 nF load) - ensures sharp edge fidelity critical for EMI reduction and ZVS/ZCS timing accuracy. |
| Input Threshold | TTL/CMOS compatible, voltage-independent - interoperates directly with 3.3-V or 5-V microcontrollers without level-shifting. |
| Operating Temp | −40°C to 140°C junction - qualified for under-hood automotive, industrial motor drives, and UPS thermal environments. |
| UVLO Hysteresis | 0.2–0.5 V - prevents oscillatory output behavior during brown-out conditions. |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, exposed pad not present - optimized for space-constrained PCB layouts with moderate thermal dissipation (θJA = 217.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Bias supply input | Primary power rail; powers internal logic and output stage; requires local 1-µF ceramic bypass to GND. |
| 2 - OUTH | Source output terminal | Drives gate high via external resistor; connects to P-channel pull-up path; must be isolated from OUTL for split-drive operation. |
| 3 - OUTL | Sink output terminal | Drives gate low via external resistor; connects to N-channel pull-down path; strong 0.375 Ω pulldown impedance suppresses Miller turn-on. |
| 4 - GND | Reference ground | Common return for VDD, inputs, and outputs; requires low-inductance connection to power ground plane. |
| 5 - IN− | Inverting input | Active-low control: drives output high when pulled low; floating state forces output low via internal pulldown. |
| 6 - IN+ | Noninverting input | Active-high control: drives output high when pulled high; floating state forces output low via internal pullup. |
Key Features
| Feature | Design Value |
|---|---|
| Split output (OUTH/OUTL) | Enables independent turn-on (Ron) and turn-off (Roff) resistor selection - critical for optimizing EMI, efficiency, and device stress in hard-switched topologies. |
| 8-A sink current | Provides 2× higher turn-off current than symmetrical drivers - actively clamps gate voltage during dV/dt transients to prevent parasitic Miller turn-on in SiC/GaN switches. |
| Dual-input logic (IN+/IN−) | Supports both inverting and noninverting configurations in one device; unused input serves as hardware enable/disable without extra logic gates. |
| VDD-independent input thresholds | Eliminates need for input-level translation when interfacing with mixed-voltage controllers (e.g., 3.3-V MCU driving 12-V gate driver). |
| UVLO with hysteresis | Guarantees defined low-state output during power ramp-up/down - prevents partial switching and shoot-through in cascaded power stages. |
Applications
| High-Frequency DC-DC Converters | GaN-Based Solar Inverters |
|---|---|
|
Use Scenario: 1–3 MHz buck/boost converters using 650-V GaN HEMTs in telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Low-side gate driver providing sub-15 ns propagation delay and independent slew control to meet tight dead-time requirements and minimize conduction losses. Use Value: 4-A/8-A asymmetrical drive reduces gate charge time while suppressing Miller-induced false turn-on, improving efficiency by ≥0.8% at 2 MHz. |
Use Scenario: String-level MPPT inverters with half-bridge GaN modules operating at 100–250 kHz under outdoor thermal cycling. IC Role / Device Role / Timing Role: Robust low-side driver handling 140°C junction temperatures and 20-V input transients without level shifters or external protection. Use Value: −40°C to 140°C rating and 20-V input tolerance eliminate derating concerns in uncooled enclosures, extending field lifetime. |
| Industrial Motor Drives | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: 3-phase BLDC inverters with IGBTs in HVAC compressors and pump controllers requiring high-noise immunity. IC Role / Device Role / Timing Role: Gate driver with 1.0-V input hysteresis and strong 8-A sink current to reject EMI from adjacent power stages and motor commutation spikes. Use Value: Hysteretic thresholds and low-impedance pulldown reduce false triggering events by >99.9% in 48-V/10-A motor control boards. |
Use Scenario: Online double-conversion UPS systems using Si MOSFETs in PFC and inverter stages with frequent line dropouts. IC Role / Device Role / Timing Role: UVLO-protected driver ensuring clean output disable during brown-outs, preventing erratic switching during AC failover transitions. Use Value: 0.3–0.5 V UVLO hysteresis eliminates output chatter during marginal VDD conditions, improving system reliability during grid instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-side gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC27512DRS | Same electrical specs but in 3-mm × 3-mm WSON-6 package with exposed thermal pad (θJA = 85.6°C/W vs. 217.8°C/W). | Preferred for thermally constrained, high-power-density designs where board space allows larger footprint but lower junction temperature is critical. | Select UCC27512DRS when thermal resistance <100°C/W is required; UCC27511DBVT remains optimal for ultra-compact layouts with moderate power dissipation. |
| LM5113SDX/NOPB | 4-A/6-A asymmetrical drive, 17-ns propagation delay, 5-V–14-V VDD range, no dual-input flexibility - uses single EN/IN pin. | Targeted at cost-sensitive, fixed-configuration SMPS where enable-only control suffices and wider VDD range is unnecessary. | Choose LM5113SDX/NOPB only if dual-input functionality and 4.5-V minimum VDD are not required; UCC27511DBVT offers superior noise immunity and design flexibility. |
Compared with UCC27512DRS, UCC27511DBVT trades thermal performance for minimal PCB area; versus LM5113SDX/NOPB, it delivers tighter timing control, broader supply range, and configurable logic polarity - making it the preferred choice for GaN, high-reliability, or thermally flexible designs.
Availability
UCC27511DBVT is available at Aetrix Electronics and suitable for high-frequency DC-DC converters, GaN-based solar inverters, and industrial motor drives requiring stable component supply across extended temperature and voltage ranges.
Supply support for UCC27511DBVT 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 specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in industrial, automotive, and communications markets.
The UCC2751x family was designed specifically for high-efficiency, high-frequency power conversion systems - targeting emerging wide-bandgap devices (GaN/SiC), digital power controllers, and thermally demanding industrial applications.
FAQ
What is the maximum allowable voltage on the IN+ and IN− pins of the UCC27511DBVT?
The UCC27511DBVT specifies an absolute maximum input voltage of −0.3 V to 20 V on both IN+ and IN− pins, independent of the VDD supply voltage. This allows direct interfacing with auxiliary bias rails or higher-voltage control signals without level-shifting circuitry - a key advantage in multi-supply systems where VDD may be 12 V while enable logic runs at 15 V.
Can the UCC27511DBVT drive GaN power devices effectively?
Yes, the UCC27511DBVT is explicitly qualified for GaN power devices. Its 4-A source / 8-A sink capability, 13-ns propagation delay, and strong 0.375-Ω pulldown impedance provide rapid gate discharge to suppress Miller-induced false turn-on - a critical requirement for 650-V GaN HEMTs operating above 1 MHz in DC-DC and solar applications.
How does the split-output configuration (OUTH/OUTL) improve system performance in the UCC27511DBVT?
The UCC27511DBVT's split-output architecture allows independent external resistors on OUTH (turn-on) and OUTL (turn-off) pins. This enables precise control of dv/dt during switching transitions - reducing EMI emissions, minimizing switching losses, and preventing voltage overshoot in hard-switched topologies without compromising turn-on speed or efficiency.
Does the UCC27511DBVT require external pull-up or pull-down resistors on its input pins?
No, the UCC27511DBVT integrates internal pullup (IN+) and pulldown (IN−) resistors. When either input is left unconnected, the corresponding internal resistor forces the output low - ensuring fail-safe behavior during floating conditions. External biasing is only needed when implementing active enable/disable or specific logic polarity configurations.
What is the thermal performance difference between UCC27511DBVT and UCC27512DRS packages?
The UCC27511DBVT in SOT-23-6 has a junction-to-ambient thermal resistance (θJA) of 217.8°C/W, while the UCC27512DRS in WSON-6 achieves 85.6°C/W due to its exposed thermal pad. This means the UCC27512DRS can dissipate ~2.5× more power at the same ambient temperature - making it preferable for >1-W continuous operation, whereas UCC27511DBVT suits compact, lower-power layouts.
UCC27511DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- IGBT, N-Channel MOSFET
- Voltage - Supply:
- 4.5V ~ 18V
- Logic Voltage - VIL, VIH:
- 1V, 2.4V
- Current - Peak Output (Source, Sink):
- 4A, 8A
- Input Type:
- Inverting, Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 8ns, 7ns
- Operating Temperature:
- -40°C ~ 140°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
UCC27511DBVT FAQ
1.How can I place an order for UCC27511DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC27511DBVT 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 UCC27511DBVT reliable?
The price and inventory of UCC27511DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC27511DBVT is usually 5 days.
3.What payment methods are accepted for UCC27511DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC27511DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC27511DBVT?
UCC27511DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC27511DBVT 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 UCC27511DBVT?
For technical support, including UCC27511DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC27511DBVT requirements.
6.How does Aetrix verify that UCC27511DBVT is sourced from the original manufacturer or authorized distributors?
All UCC27511DBVT 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 UCC27511DBVT meets industry standards.
7.What is the process for return or replacement of UCC27511DBVT?
All UCC27511DBVT units undergo pre-shipment inspection (PSI). If there is an issue with UCC27511DBVT, 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 UCC27511DBVT part is unused and in its original packaging.
Return procedure for UCC27511DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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