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Texas Instruments UCC27321QDRQ1
- Part No.:
- UCC27321QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
UCC27321QDRQ1.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
UCC27321QDRQ1 from Texas Instruments is an automotive-grade, single-channel, inverting low-side MOSFET driver delivering ±9 A peak output current at the Miller plateau region using TrueDrive™ bipolar-CMOS hybrid output architecture. It operates from 4.5 V to 15 V supply voltage, features 20-ns rise / 15-ns fall times (10-nF load), and integrates an enable pin (ENBL) on pin 3 for active-high logic control - designed specifically for high-dV/dt gate driving in synchronous buck converters and motor controllers.
For engineers reviewing the UCC27321QDRQ1 datasheet, UCC27321QDRQ1 pinout, UCC27321QDRQ1 application, or UCC27321QDRQ1 equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to 125°C), industry-standard SOIC-8 pinout with ENBL addition, ±9-A Miller-region drive capability, TTL/CMOS-compatible input thresholds independent of VDD, and thermal performance in the D-package (RθJA = 113°C/W).
Technical Context
The UCC27321QDRQ1 implements a dual-stage TrueDrive™ output architecture combining parallel bipolar and MOSFET transistors to deliver high-current sourcing during Miller plateau transitions while maintaining low output resistance (0.6 Ω high-side, 0.4 Ω low-side). Its inverting logic function enables direct interface with PWM controllers requiring inverted gate signals for N-channel synchronous rectifiers.
It features separate AGND and PGND pins to isolate control and power ground paths, minimizing noise coupling; ENBL is internally pulled up to VDD and forces output low when disabled. Input thresholds (VIH = 1.6–2.5 V, VIL = 1.1–2.0 V) and hysteresis (0.18–0.9 V) ensure robust noise immunity across temperature and supply voltage variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | ±9 A at Miller plateau - enables fast switching of large Qg MOSFETs under high dV/dt conditions without external boost circuits. |
| Rise/Fall Time | 20 ns / 15 ns (10-nF load) - supports >10 MHz effective switching frequencies in hard-switched topologies. |
| Propagation Delay | 25 ns (rising input), 35 ns (falling input) - ensures tight timing control in high-frequency PWM systems with minimal skew. |
| Supply Voltage Range | 4.5 V to 15 V - compatible with 5-V, 12-V, and wide-input industrial/automotive rails without level-shifting. |
| Input Threshold | VIH = 1.6–2.5 V, VIL = 1.1–2.0 V - guarantees reliable TTL/CMOS logic compatibility across full VDD and temperature range. |
| Enable Threshold | VEN_H = 1.5–2.7 V, VEN_L = 1.1–2.0 V with hysteresis - prevents false triggering during noisy supply ramp-up or brownout conditions. |
| Thermal Resistance | RθJA = 113°C/W (SOIC-8) - defines maximum power dissipation (650 mW at TA = 25°C) for board-level thermal design. |
Pinout & Package
UCC27321QDRQ1 is packaged in an 8-pin SOIC (D) package with 6.00 mm × 4.90 mm body size and standard industry footprint. The PowerPAD™ thermal enhancement is not present in this SOIC variant (D package); that feature applies only to the MSOP-PowerPAD (DGN) variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 VDD | Power supply input | Must be externally tied together; requires local 0.1-µF ceramic + bulk capacitor for high di/dt transient response. |
| 2 IN | Inverting digital input | TTL/CMOS-compatible; drives internal logic to produce inverted output - used for synchronous rectifier gate control. |
| 3 ENBL | Active-high enable input | Internally pulled up to VDD; drives output low when disabled - enables system-level power sequencing and fault shutdown. |
| 4 AGND | Analog ground reference | Reference for input circuitry and control logic; must connect to controller ground via low-impedance trace. |
| 5 PGND | Power ground return | Return path for output stage; must tie directly to MOSFET source to minimize switching loop inductance and ringing. |
| 6, 7 OUT | Driver output terminals | Parallel-connected outputs delivering ±9 A; must be wired together externally to drive single MOSFET gate. |
Key Features
| Feature | Design Value |
|---|---|
| TrueDrive™ hybrid output | Bipolar + MOSFET parallel stage delivers 9-A peak current precisely where needed - at Miller plateau - improving turn-on/turn-off efficiency without external components. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation with HBM ESD Level 2 (2 kV) and CDM Level C6 (1 kV) - meets automotive reliability requirements. |
| Separated AGND/PGND | Minimizes ground bounce and input threshold disturbance caused by high di/dt switching currents - critical for stable operation in noisy power stages. |
| Industry-standard SOIC-8 pinout + ENBL | Adds enable functionality on unused pin 3 without altering PCB layout - enables drop-in upgrade from legacy 7-pin drivers. |
| Input overvoltage tolerance | Withstands 500-mA reverse input current without damage or logic upset - protects against signal overshoot in high-noise environments. |
Applications
| Synchronous Buck Converter | Automotive Motor Controller |
|---|---|
|
Use Scenario: Driving N-channel synchronous rectifier MOSFET in a 48-V to 5-V DC-DC converter for ADAS camera module power rail. IC Role / Device Role / Timing Role: Inverting low-side driver providing precise, high-current gate control synchronized to primary-side PWM, enabling zero-voltage switching and <1% conduction loss. Use Value: ±9-A Miller-region drive reduces gate charge time by >40% vs. 4-A drivers, lowering MOSFET switching losses and enabling 500-kHz operation with <15°C junction rise. |
Use Scenario: Gate driving dual N-channel half-bridge for 12-V BLDC fan in engine bay HVAC system. IC Role / Device Role / Timing Role: Low-side driver with ENBL enabling safe startup/shutdown sequencing and overcurrent fault response within <100 ns. Use Value: AEC-Q100 qualification and 125°C ambient rating ensure uninterrupted operation under hood temperatures; separated AGND/PGND eliminates commutation-induced logic glitches. |
| Class-D Audio Amplifier | Pulse Transformer Driver |
|
Use Scenario: Driving gate of high-side/N-channel complementary pair in 100-W automotive Class-D amplifier output stage. IC Role / Device Role / Timing Role: Fast-switching inverting driver delivering clean 20-ns edges to minimize dead-time distortion and EMI generation. Use Value: 25-ns propagation delay matching and sub-35-ns total edge transition support >300-kHz PWM carrier frequency with <0.05% THD+N at full power. |
Use Scenario: Driving primary winding of gate-drive pulse transformer in isolated IGBT inverter for electric power steering. IC Role / Device Role / Timing Role: High-current, low-jitter driver ensuring consistent transformer magnetization and minimal pulse width distortion across temperature. Use Value: ±9-A peak current sustains transformer primary current during full saturation, eliminating pulse droop and enabling <50-ns minimum pulse width fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-side MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC27322QDRQ1 | Noninverting logic function; identical pinout, specs, and packaging - same SOIC-8 footprint and TrueDrive architecture. | Used where controller output polarity matches MOSFET gate requirement without inversion - e.g., high-side driver bootstrap circuits or non-inverted PWM interfaces. | Select UCC27322QDRQ1 only when inverting logic is not required; otherwise UCC27321QDRQ1 is mandatory for synchronous rectifier control. |
| TPS2811QDRQ1 | Dual-channel, 2-A per channel, integrated 5-V regulator; SOIC-8 package but no ENBL pin and lower peak current (2 A vs. 9 A). | Suitable for low-power, space-constrained dual-gate applications (e.g., half-bridge pre-driver), not high-Qg MOSFETs or Miller-critical designs. | Choose TPS2811QDRQ1 only for cost-sensitive dual low-current drivers; UCC27321QDRQ1 remains superior for single-channel, high-current, automotive-grade gate driving. |
Compared with UCC27322QDRQ1, UCC27321QDRQ1 provides essential inverting logic for synchronous rectification, while TPS2811QDRQ1 trades peak current and enable control for dual-channel integration - making UCC27321QDRQ1 the only qualified solution for demanding single-channel, high-Miller-current automotive gate drive.
Availability
UCC27321QDRQ1 is available at Aetrix Electronics and suitable for automotive power conversion, motor control, and Class-D audio amplifier designs requiring stable component supply, AEC-Q100 compliance, and high-reliability gate driving under extreme thermal conditions.
Supply support for UCC27321QDRQ1 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 automotive ICs, with decades of expertise in high-reliability power management solutions.
The UCC27321QDRQ1 belongs to TI's automotive-qualified gate driver product line, engineered specifically for high-speed, high-current, low-side MOSFET/IGBT interfacing in safety-critical power systems such as ADAS, EPS, and onboard chargers.
FAQ
What is the logic function of UCC27321QDRQ1?
UCC27321QDRQ1 is an inverting low-side MOSFET driver: when the IN pin is driven high, the OUT pin goes low, and vice versa. This behavior is confirmed in the functional block diagram and input/output table of the official datasheet (SLUSA13E), and distinguishes it from the noninverting UCC27322QDRQ1. The inverting function is essential for driving N-channel synchronous rectifiers in buck-derived topologies.
Does UCC27321QDRQ1 support 3.3-V logic inputs?
Yes, UCC27321QDRQ1 supports 3.3-V logic inputs reliably: its VIH threshold ranges from 1.6 V to 2.5 V and VIL from 1.1 V to 2.0 V across temperature and supply voltage, ensuring robust recognition of 3.3-V CMOS/TTL signals regardless of VDD level. This is explicitly verified in Section 7.5 of the datasheet under "INPUT (IN)" specifications.
What package type is UCC27321QDRQ1 supplied in?
UCC27321QDRQ1 is supplied in an 8-pin SOIC (D) package with 6.00 mm × 4.90 mm body size and standard industry footprint. It does not include the PowerPAD™ thermal enhancement - that feature is exclusive to the MSOP-PowerPAD (DGN) variant (e.g., UCC27321QDGNRQ1). Pin configuration matches Figure 6-1 in the datasheet.
How is the ENBL pin configured on UCC27321QDRQ1?
The ENBL pin (pin 3) on UCC27321QDRQ1 is internally pulled up to VDD and operates as an active-high enable: when ENBL ≥ VEN_H (1.5–2.7 V), the driver functions normally; when ENBL ≤ VEN_L (1.1–2.0 V), the output is forced low regardless of IN state. This behavior is documented in Table 6-1 and Section 8.3.4 of the SLUSA13E datasheet.
Is UCC27321QDRQ1 pin-compatible with older non-automotive UCC27321 variants?
Yes, UCC27321QDRQ1 maintains identical pinout, electrical characteristics, and SOIC-8 package dimensions as the commercial-grade UCC27321DR, enabling direct PCB replacement. However, it adds AEC-Q100 qualification, enhanced ESD protection (HBM 2 kV, CDM 1 kV), and extended temperature validation - all without altering pin assignment or footprint.
UCC27321QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 4V ~ 15V
- Logic Voltage - VIL, VIH:
- 1.1V, 2.7V
- Current - Peak Output (Source, Sink):
- 9A, 9A
- Input Type:
- Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 20ns, 20ns
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
UCC27321QDRQ1 FAQ
1.How can I place an order for UCC27321QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC27321QDRQ1 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 UCC27321QDRQ1 reliable?
The price and inventory of UCC27321QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC27321QDRQ1 is usually 5 days.
3.What payment methods are accepted for UCC27321QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC27321QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC27321QDRQ1?
UCC27321QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC27321QDRQ1 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 UCC27321QDRQ1?
For technical support, including UCC27321QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC27321QDRQ1 requirements.
6.How does Aetrix verify that UCC27321QDRQ1 is sourced from the original manufacturer or authorized distributors?
All UCC27321QDRQ1 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 UCC27321QDRQ1 meets industry standards.
7.What is the process for return or replacement of UCC27321QDRQ1?
All UCC27321QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with UCC27321QDRQ1, 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 UCC27321QDRQ1 part is unused and in its original packaging.
Return procedure for UCC27321QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCC27321QDRQ1 Tags
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ZXGD3009E6TA
Diodes Incorporated
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1EDN7512BXTSA1
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UCC27517DBVR
Texas Instruments
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MCP1415T-E/OT
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IX4428NTR
Littelfuse Inc.
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IRS2005STRPBF
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IRS2008STRPBF
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IX4310TTR
Littelfuse Inc.
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2EDN7524RXTMA1
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