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Texas Instruments UCC27511DBVR
- Part No.:
- UCC27511DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- SOT-23-6
- Datasheet:
-
UCC27511DBVR.pdf
- Description:
- IC GATE DRVR LOW-SIDE SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
UCC27511DBVR from Texas Instruments is a single-channel, high-speed, low-side MOSFET/IGBT gate driver with asymmetrical 4-A source / 8-A sink peak current, 13-ns typical propagation delay, and split-output (OUTH/OUTL) architecture for independent turn-on/turn-off control - deployed in DC-DC converters, GaN-based power supplies, and motor drives.
For engineers reviewing the UCC27511DBVR datasheet, UCC27511DBVR pinout, UCC27511DBVR application, or UCC27511DBVR equivalent, key selection considerations include its SOT-23-6 package, TTL/CMOS-compatible input thresholds independent of VDD, UVLO protection (4.2 V turn-on), –40°C to 140°C operation, and Miller immunity enabled by strong 8-A sink capability.
Technical Context
The UCC27511DBVR uses a dual-input architecture (IN+, IN−) supporting both noninverting and inverting configurations; unused input can serve as enable/disable. Its split-output stage isolates sourcing (OUTH) and sinking (OUTL) paths, enabling discrete RC tuning of rise/fall times without diode stacking.
Internal UVLO holds outputs low below 4.2 V (typ), ensuring glitch-free startup/shutdown. Input hysteresis (1.0 V typ) and voltage-tolerant inputs (–0.3 V to 20 V, independent of VDD) provide robust noise immunity in high-dV/dt environments common in SiC/GaN switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 4.5 V to 18 V - supports wide-bias systems including 5 V, 12 V, and 15 V rails; enables direct interface with GaN FET gate drivers requiring low-voltage logic. |
| Peak Output Current | 4 A source / 8 A sink - asymmetrical drive strengthens Miller immunity and reduces false turn-on risk in high-speed half-bridge topologies. |
| Propagation Delay | 13 ns typical - ensures precise timing alignment in >1 MHz switching converters and digital power controllers. |
| Rise/Fall Time | 9 ns / 7 ns typical (1.8 nF load) - enables fast edge control critical for minimizing switching losses in wide-bandgap devices. |
| Input Threshold | TTL/CMOS compatible, VIN_H = 2.4 V, VIN_L = 1.2 V, hysteresis = 1.0 V - ensures reliable logic-level interfacing with 3.3 V/5 V microcontrollers without level-shifting. |
| Operating Temp | –40°C to 140°C - qualified for under-hood automotive, industrial motor control, and high-ambient UPS applications. |
| UVLO Threshold | 4.2 V (rising), 3.9 V (falling) - prevents erratic output behavior during brown-out conditions and ensures controlled power-up sequencing. |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, gull-wing leads, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Bias supply input | Primary power rail; powers internal logic and output stage; must be decoupled with ≥1 µF ceramic capacitor to GND. |
| 2 - OUTH | Output high-side terminal | Sourcing path only; connect series resistor to MOSFET gate for adjustable turn-on slew rate; floats high-impedance when output low. |
| 3 - OUTL | Output low-side terminal | Sinking path only; connect series resistor to MOSFET gate for adjustable turn-off slew rate; pulls gate to GND when active. |
| 4 - GND | Reference ground | Common return for VDD, inputs, and outputs; requires low-inductance PCB connection to minimize ground bounce. |
| 5 - IN− | Inverting input | Active-low control input; when used in noninverting mode, tie to GND to enable; floating state forces output low via internal pulldown. |
| 6 - IN+ | Noninverting input | Active-high control input; when used in inverting mode, tie to VDD to enable; floating state forces output low via internal pullup. |
Key Features
| Feature | Design Value |
|---|---|
| Split output (OUTH/OUTL) | Enables independent optimization of gate turn-on and turn-off speeds using separate series resistors - eliminates need for external diodes in slew-rate control. |
| 8-A peak sink current | Provides low 0.375 Ω pulldown impedance to actively clamp gate voltage, suppressing Miller-induced false turn-on in high-dV/dt switching nodes. |
| Dual-input logic flexibility | Supports inverting or noninverting configuration in same device; unused input repurposed as hardware enable/disable without external logic. |
| VDD-independent input thresholds | CMOS/TTL-compatible thresholds fixed at 1.2 V / 2.4 V regardless of supply voltage - ensures consistent timing across 4.5–18 V operation range. |
| UVLO with hysteresis | Holds outputs low during undervoltage events (3.9 V to 4.2 V window); guarantees deterministic startup and shutdown in unregulated auxiliary rails. |
Applications
| High-Frequency DC-DC Converters | GaN-Based Power Supplies |
|---|---|
|
Use Scenario: 1–3 MHz buck converter driving enhancement-mode GaN HEMTs in telecom rectifiers and server VRMs. IC Role / Device Role: Low-side gate driver providing fast, high-current gate charge/discharge to minimize conduction and switching losses. Use Value: 9 ns rise time and 4-A/8-A asymmetrical drive reduce gate energy loss by >35% versus legacy drivers, enabling higher efficiency at elevated frequencies. |
Use Scenario: 48 V–12 V isolated LLC resonant converter using GaN FETs in datacenter PSUs. IC Role / Device Role: Gate driver interfacing with digital controller PWM outputs while surviving >100 V/ns dV/dt transients. Use Value: Input voltage tolerance up to 20 V and 1.0 V hysteresis prevent false triggering during fast bus transients, improving system reliability. |
| Motor Drive Half-Bridge Stages | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: 20–100 kHz three-phase inverter stage driving IGBTs in HVAC compressors and industrial servo drives. IC Role / Device Role: Low-side driver controlling bottom switches in each leg; coordinated with high-side bootstrap drivers. Use Value: 140°C junction rating and robust 8-A sink capability maintain gate control integrity under sustained overload and thermal stress conditions. |
Use Scenario: Line-interactive UPS with bidirectional DC-AC inverter using Si MOSFETs in synchronous rectification mode. IC Role / Device Role: Gate driver for low-side switches in full-bridge output stage, operating from 12 V auxiliary rail. Use Value: 4.5 V minimum VDD allows stable operation during battery-backed brownouts, while UVLO prevents erratic switching during AC dropout. |
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 for DBV. | Better thermal performance required in high-power-density designs; not pin-to-pin compatible due to different pinout (IN+/IN− swapped, shared OUT). | Select UCC27512DRS when board space permits WSON and thermal dissipation >150 mW is needed; verify layout compatibility. |
| LM5113SDX | 4-A/6-A sink/source, 15 ns propagation delay, 5-V–14-V VDD range, no split output; includes enable pin and fault reporting. | Targeted at automotive-grade systems; lacks independent turn-on/turn-off control but adds safety monitoring features. | Choose LM5113SDX for AEC-Q100-compliant designs where diagnostics outweigh slew-rate tuning flexibility. |
Compared with UCC27511DBVR, UCC27512DRS offers superior thermal management in compact layouts but requires PCB redesign, while LM5113SDX trades split-output flexibility for integrated diagnostics and automotive qualification - making UCC27511DBVR optimal for cost-sensitive, high-frequency GaN/SiC applications needing precise edge control.
Availability
UCC27511DBVR is available at Aetrix Electronics and suitable for high-frequency DC-DC converters, GaN-based power supplies, and motor drive half-bridge stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for UCC27511DBVR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The UCC27511DBVR belongs to TI's UCC2751x family of high-speed low-side gate drivers, engineered specifically for efficient, robust switching in high-frequency power conversion systems using Si, SiC, and GaN power devices.
FAQ
What is the maximum operating temperature for the UCC27511DBVR?
The UCC27511DBVR is rated for operation from –40°C to 140°C junction temperature. This extended range supports deployment in thermally demanding environments such as enclosed motor drives, high-density server PSUs, and under-hood automotive modules. Thermal design must account for its SOT-23-6 package's θJA of 217.8°C/W under JEDEC-standard conditions.
Does the UCC27511DBVR support both inverting and noninverting configurations?
Yes, the UCC27511DBVR features dual inputs (IN+ and IN−) enabling either configuration. For noninverting operation, apply signal to IN+ and tie IN− to GND; for inverting, apply signal to IN− and tie IN+ to VDD. The unused input is internally biased, ensuring the output remains low if left unconnected - eliminating external pull resistors.
Can the OUTH and OUTL pins of the UCC27511DBVR be tied together?
Yes, OUTH and OUTL may be externally shorted to emulate a conventional single-output gate driver. In this configuration, the UCC27511DBVR delivers 4-A source and 8-A sink from the combined node. However, independent slew-rate control is lost, and layout must ensure equal trace impedance to avoid imbalance in current sharing.
What is the purpose of the UVLO circuit in the UCC27511DBVR?
The UVLO circuit in the UCC27511DBVR disables the output stage when VDD falls below ~3.9 V (falling threshold), holding both OUTH and OUTL low until VDD rises above ~4.2 V. This prevents partial or erratic gate drive during power-up, brown-out, or fault conditions - ensuring safe, predictable switching behavior in mission-critical power systems.
How does the UCC27511DBVR achieve immunity to Miller turn-on effects?
The UCC27511DBVR combats Miller-induced false turn-on primarily through its 8-A peak sink current and low 0.375 Ω pulldown impedance, which rapidly discharges the MOSFET gate during high dV/dt transitions. Combined with split outputs allowing aggressive turn-off resistor values on OUTL, it maintains gate voltage below threshold even under >100 V/ns parasitic coupling.
UCC27511DBVR 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
UCC27511DBVR FAQ
1.How can I place an order for UCC27511DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC27511DBVR 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 UCC27511DBVR reliable?
The price and inventory of UCC27511DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC27511DBVR is usually 5 days.
3.What payment methods are accepted for UCC27511DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC27511DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC27511DBVR?
UCC27511DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC27511DBVR 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 UCC27511DBVR?
For technical support, including UCC27511DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC27511DBVR requirements.
6.How does Aetrix verify that UCC27511DBVR is sourced from the original manufacturer or authorized distributors?
All UCC27511DBVR 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 UCC27511DBVR meets industry standards.
7.What is the process for return or replacement of UCC27511DBVR?
All UCC27511DBVR units undergo pre-shipment inspection (PSI). If there is an issue with UCC27511DBVR, 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 UCC27511DBVR part is unused and in its original packaging.
Return procedure for UCC27511DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCC27511DBVR Tags
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