UCC27511A - 4A/8A Low-Side Gate Driver | Texas Instruments
MPN: UCC27511A β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.95 | $95.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.78 | $780.00 |
Drop-in alternatives for UCC27511A β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
UCC27511
β Drop-Inπ Reference alternative (not in catalog)
UCC27511AQDBVRQ1
β Drop-Inπ Reference alternative (not in catalog)
UCC27531
β Drop-Inπ Reference alternative (not in catalog)
1EDN7550
β Drop-Inπ Reference alternative (not in catalog)
UCC27517
β Drop-Inπ Reference alternative (not in catalog)
UCC27511A Maximum Ratings & Electrical Characteristics
| Number of Channels | 1 |
| Peak Source Current | 4 A |
| Peak Sink Current | 8 A |
| Propagation Delay | 13 ns |
| Input Voltage Range | 4.5 V to 18 V |
| UVLO Threshold | 5 V (typical) |
| Output Configuration | Split outputs (OUTH, OUTL) |
| Input Logic Compatibility | 5 V |
| Rise Time | [DATA_NEEDED: rise time] |
| Fall Time | [DATA_NEEDED: fall time] |
| Operating Temperature Range | -40Β°C to +140Β°C |
| Package | SOT-23-6 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Enable Pin | Yes |
UCC27511A Pin Configuration
| Pin 1 | IN β Input signal |
| Pin 2 | GND β Ground |
| Pin 3 | EN β Enable (active high) |
| Pin 4 | OUTL β Low-side output (sink) |
| Pin 5 | OUTH β High-side output (source) |
| Pin 6 | VDD β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
UCC27511A is suitable for 6 applications: Switch-Mode Power Supplies, DC-to-DC Converters, Companion Gate-Driver Circuits, Motor Drives, GaN Power Devices, Solar Inverters.
Switch-Mode Power Supplies
The UCC27511A is ideal for driving the power MOSFET in switch-mode power supplies (SMPS). Its 4-A source and 8-A sink currents enable fast switching, reducing switching losses and improving efficiency. The 13-ns propagation delay ensures precise timing, critical for synchronous rectification and active clamping. The wide input voltage range (4.5V to 18V) accommodates various control ICs, and the split outputs allow independent tuning of turn-on and turn-off speeds to optimize EMI and efficiency.
Recommended
DC-to-DC Converters
In DC-to-DC converters, the UCC27511A drives the low-side MOSFET in buck, boost, and buck-boost topologies. Its high peak currents ensure rapid gate charging, minimizing dead time and reducing body diode conduction losses. The 5-V UVLO ensures reliable operation during startup, and the enable pin allows power sequencing in multi-rail systems. The compact SOT-23-6 package is ideal for space-constrained designs, and the 13-ns propagation delay supports high switching frequencies up to several MHz.
Recommended
Companion Gate-Driver Circuits
The UCC27511A serves as a companion gate driver for power modules and discrete switches in various applications. It can be used to boost the drive capability of a PWM controller, providing the high peak currents needed for large gate capacitances. The split outputs allow independent control of rise and fall times, enabling designers to tailor switching behavior for specific applications. Its robust design minimizes shoot-through current, enhancing reliability in noisy industrial environments.
Recommended
Motor Drives
The UCC27511A can be used in motor drive applications to drive the low-side MOSFETs in inverter stages. Its fast propagation delay and high peak currents enable efficient switching at high PWM frequencies, reducing losses and improving motor control accuracy. The enable pin allows for safe shutdown during fault conditions. The device's wide operating temperature range (-40Β°C to +140Β°C) makes it suitable for industrial motor drives operating in harsh environments.
Recommended
GaN Power Devices
The UCC27511A is rated for driving GaN power devices, which require fast, high-current gate drive to minimize switching losses. Its 4-A source and 8-A sink currents provide the necessary charge for GaN gates, and the 13-ns propagation delay ensures precise timing. The split outputs allow independent control of turn-on and turn-off, which is critical for GaN devices to avoid overshoot and ringing. The device's low output impedance and rail-to-rail swing are well-suited for GaN's low threshold voltage.
Recommended
Solar Inverters
In solar inverters, the UCC27511A drives the low-side MOSFETs in boost converters and inverter stages. Its high peak currents and fast switching reduce losses, improving overall system efficiency. The wide input voltage range allows operation from various control ICs, and the enable pin enables safe shutdown during grid faults. The device's robust design ensures reliable operation in outdoor environments with wide temperature variations.
Recommended
Recommended Products Summary
Engineering reference data for UCC27511A β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UCC27511 | UCC27511AQDBVRQ1 | UCC27531 | 1EDN7550 |
|---|---|---|---|---|---|
| Package | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Infineon |
| Peak Source Current | 4 A | 4 A | 4 A | 4 A | 4 A |
| Peak Sink Current | 8 A | 8 A | 8 A | 8 A | 8 A |
| Propagation Delay | 13 ns | 13 ns | 13 ns | 13 ns | [DATA_NEEDED] |
| Input Voltage Range | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 18 V | 4.5 V to 32 V | [DATA_NEEDED] |
| UVLO Threshold | 5 V | 5 V | 5 V | 8.9 V | [DATA_NEEDED] |
| Enable Pin | Yes | Yes | Yes | Yes | [DATA_NEEDED] |
Key Differentiators
- Enhanced noise immunity (vs UCC27511)
- 5-V input handling (vs UCC27511)
- Automotive grade option (vs UCC27511A)
Design Notes
Place a 1-uF ceramic capacitor as close as possible to the VDD pin to ensure stable operation and minimize voltage dips during switching. Use a low-inductance ground connection to reduce ringing. The split outputs (OUTH and OUTL) allow independent gate resistors; use separate resistors to tune rise and fall times for optimal EMI and efficiency.
The UCC27511A in SOT-23-6 package has limited thermal dissipation capability. At high switching frequencies and large gate charges, power dissipation can be significant. Ensure adequate copper area on the PCB for heat sinking. For high-power applications, consider using a driver with a larger package or external heat management.
Do not exceed the absolute maximum supply voltage of 18V. The enable pin can handle 5V logic, but ensure the input signal does not exceed the VDD voltage. When driving GaN devices, pay attention to the gate loop inductance; keep the driver close to the transistor to minimize parasitic effects.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualified variant available (UCC27511AQDBVRQ1).
