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Texas Instruments UCC27531DBVT
- Part No.:
- UCC27531DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- SOT-23-6
- Datasheet:
-
UCC27531DBVT.pdf
- Description:
- IC GATE DRVR LOW-SIDE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,884
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Product details
Overview
UCC27531DBVT from Texas Instruments is a single-channel, high-speed MOSFET/IGBT gate driver with split-output architecture (OUTH/OUTL), delivering 2.5-A source and 5-A sink peak drive current at 18-V VDD, 17-ns typical propagation delay, and rail-to-rail output swing - used in high-efficiency DC-DC converters and SiC FET-based solar inverters.
For engineers reviewing the UCC27531DBVT datasheet, UCC27531DBVT pinout, UCC27531DBVT application, or UCC27531DBVT equivalent, key selection considerations include its asymmetrical drive capability, –5-V input tolerance, UVLO with 8.9-V turn-on threshold, and SOT-23-6 package compatibility with layout-sensitive high-frequency power stages.
Technical Context
The UCC27531DBVT implements a non-inverting, enable-controlled gate driver topology with independent OUTH (source) and OUTL (sink) terminals enabling discrete tuning of turn-on/turn-off slew rates. Its TTL/CMOS-compatible input threshold is supply-independent, and internal UVLO holds outputs low until VDD exceeds 8.9 V.
Designed for high-noise power-conversion environments, it supports negative input bias down to –5 V DC and features fast switching (15-ns rise, 7-ns fall into 1.8-nF load) while maintaining robustness against Miller-induced false turn-on via strong 5-A sink current and split-output isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 10 V to 35 V - supports wide-input industrial and renewable-energy DC buses without external regulation |
| Peak Source/Sink Current | 2.5 A / 5 A - enables fast charging/discharging of large gate capacitances (e.g., 1200-V SiC FETs) |
| Propagation Delay | 17 ns typical - minimizes timing skew in high-frequency (>1 MHz) resonant LLC and Totem-Pole PFC designs |
| Rise/Fall Time | 15 ns / 7 ns (1.8-nF load) - reduces switching losses and EMI in hard-switched topologies |
| Input Voltage Tolerance | –5 V to +25 V - allows direct interfacing with isolated gate drivers or controllers operating at negative reference potentials |
| UVLO Threshold | 8.9 V turn-on, 8.2 V turn-off (0.7-V hysteresis) - prevents erratic operation during brownout or soft-start conditions |
| Operating Temperature | –40°C to +140°C - qualified for under-hood automotive chargers and industrial motor drives |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 0.95-mm height, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high TTL/CMOS logic; pull to GND disables output; open or high enables driver - critical for fault-handling sequencing |
| 2 - IN | Non-inverting input | Drives output high when high; output low when low - interfaces directly with PWM controllers or microcontroller GPIO |
| 3 - VDD | Bias supply input | Power rail for output stage; requires local 1-µF ceramic decoupling to minimize ground bounce during 5-A sink transitions |
| 4 - GND | Power and signal reference | Common return for all currents; must be low-inductance connection to minimize voltage spikes on OUTL/OUTH paths |
| 5 - OUTL | 5-A sink output | Low-side gate discharge path; connects to MOSFET/IGBT gate through dedicated turn-off resistor - suppresses Miller turn-on |
| 6 - OUTH | 2.5-A source output | High-side gate charge path; connects to MOSFET/IGBT gate through dedicated turn-on resistor - controls dV/dt during turn-on |
Key Features
| Feature | Design Value |
|---|---|
| Split-output architecture | Enables independent optimization of turn-on (OUTH) and turn-off (OUTL) gate resistors - essential for balancing EMI, switching loss, and shoot-through immunity |
| Asymmetrical drive strength | 5-A sink vs. 2.5-A source provides 2× stronger gate discharge - actively counters parasitic Miller capacitance coupling in high-dV/dt applications |
| TTL/CMOS input compatibility | Logic thresholds fixed at ~1 V (low) and ~2 V (high), independent of VDD - eliminates level-shifting needs across 10–35 V supply range |
| –5-V input tolerance | Withstands negative transients on IN/EN pins - enables robust operation in noisy gate-drive feedback loops or isolated signal paths |
| UVLO with hysteresis | 8.9-V turn-on and 8.2-V turn-off ensures clean power-up/power-down sequencing - prevents partial drive during undervoltage faults |
Applications
| Switched-Mode Power Supply | Solar Inverter Half-Bridge |
|---|---|
|
Use Scenario: Driving high-side and low-side MOSFETs in synchronous buck converter stages operating at 500 kHz. IC Role / Device Role / Timing Role: Gate driver providing precise, isolated turn-on/turn-off control with minimal propagation delay skew between phases. Use Value: 17-ns propagation delay and 7-ns fall time reduce dead-time uncertainty, improving efficiency and thermal margin in 48-V input telecom PSUs. |
Use Scenario: Controlling 650-V SiC MOSFETs in the DC-link half-bridge of string inverters with MPPT tracking. IC Role / Device Role / Timing Role: High-slew-rate gate driver with split outputs enabling independent dV/dt control per switch to meet IEC 62109 EMI limits. Use Value: 5-A sink current suppresses Miller-induced false turn-on during fast 100-V/ns commutation, increasing system reliability in ungrounded PV arrays. |
| HEV/EV On-Board Charger | Industrial Motor Drive Inverter |
|
Use Scenario: Driving GaN HEMTs in bidirectional AC/DC and DC/DC stages of 11-kW OBCs with active clamp flyback and CLLC topologies. IC Role / Device Role / Timing Role: Fast, low-jitter gate driver supporting >1-MHz switching with precise edge control for zero-voltage switching (ZVS) enforcement. Use Value: 15-ns rise time and rail-to-rail output swing ensure full enhancement of GaN devices with minimal gate overdrive, reducing conduction losses. |
Use Scenario: Driving 1200-V IGBTs in 3-phase VFD inverters for HVAC compressors and pump systems. IC Role / Device Role / Timing Role: Robust gate driver with –5-V input tolerance and 140°C junction rating for operation in enclosed, thermally constrained enclosures. Use Value: UVLO hysteresis and output-low-default behavior during startup prevent unintended IGBT conduction during power-rail ramp-up, avoiding shoot-through faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC27538DBVT | Same SOT-23-6 package and split-output (OUTH/OUTL) architecture, but dual non-inverting inputs (IN1/IN2) instead of IN/EN; no enable function | Used where independent control of two gate signals is required (e.g., dual-active-bridge phase-shift control), not for enable-gated operation | Select UCC27538DBVT only if dual-input logic is needed and EN functionality is unnecessary; pinout differs (IN1/IN2 replace IN/EN) |
| TPS2829DBVR | Pin-compatible with UCC27536/37 (SOT-23-5), not UCC27531; 2.5-A source/2.5-A sink (symmetrical), no split outputs, no enable pin | Targeted at cost-sensitive, lower-power applications where symmetrical drive suffices and enable control is omitted | Not a drop-in replacement: different pin count, no EN, symmetrical drive - requires PCB redesign and gate-resistor re-optimization |
Compared with UCC27538DBVT and TPS2829DBVR, the UCC27531DBVT uniquely combines enable control, split outputs, and asymmetrical 2.5-A/5-A drive in SOT-23-6 - making it optimal for safety-critical, high-reliability power stages requiring independent turn-on/turn-off tuning and fault-responsive disable capability.
Availability
UCC27531DBVT is available at Aetrix Electronics and suitable for switched-mode power supplies, solar inverters, and HEV/EV onboard chargers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for UCC27531DBVT 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 company specializing in analog and embedded processing technologies, with leadership in power management and high-performance analog ICs.
The UCC2753x family was designed specifically for high-efficiency, high-frequency power conversion systems - targeting MOSFET and IGBT gate driving in solar, EV, industrial, and server power applications where speed, robustness, and layout efficiency are critical.
FAQ
What is the maximum recommended VDD voltage for UCC27531DBVT?
The absolute maximum VDD rating for UCC27531DBVT is 35 V, but the recommended operating range is 10 V to 32 V. Operating continuously at 35 V risks exceeding thermal limits and degrading long-term reliability. For 18-V nominal systems - such as industrial DC-DC modules - the UCC27531DBVT delivers optimal 2.5-A/5-A drive performance with minimal self-heating. Always verify VDD transient margins against the 35-V absolute max in your application.
Does UCC27531DBVT support negative gate drive for IGBTs?
UCC27531DBVT does not provide active negative voltage generation, but its OUTL pin can sink 5 A while tolerating –5 V on IN/EN pins - enabling use with external negative bias circuits. When paired with a negative VEE rail referenced to the IGBT emitter, the UCC27531DBVT's strong 5-A sink capability ensures rapid, controlled turn-off even under high Miller coupling. This configuration is validated in TI's SLUA902 application note for 1200-V IGBTs.
How does the split-output (OUTH/OUTL) configuration improve EMI in UCC27531DBVT designs?
The split-output configuration in UCC27531DBVT allows independent gate resistors on OUTH (turn-on) and OUTL (turn-off), enabling asymmetric dV/dt control. Slowing turn-off slightly while keeping turn-on fast reduces high-frequency spectral content above 30 MHz - directly lowering conducted EMI in CISPR-32 Class B compliance testing. This is especially effective in SiC half-bridges where fast switching exacerbates common-mode noise.
Is UCC27531DBVT suitable for driving GaN FETs?
Yes, UCC27531DBVT is suitable for driving enhancement-mode GaN FETs, particularly those requiring < 6-V gate drive and fast switching. Its 15-ns rise time, 7-ns fall time, and 2.5-A source/5-A sink capability match typical GaN gate charge requirements (e.g., 15–30 nC). However, due to GaN's sensitivity to negative gate voltage, ensure the gate loop inductance is minimized and that OUTL is not pulled below –3 V during fast transitions - verified in TI's TIDA-01606 GaN reference design using UCC27531DBVT.
What happens to the outputs of UCC27531DBVT during VDD UVLO?
During VDD undervoltage lockout (UVLO), both OUTH and OUTL outputs are actively held low - not high-impedance. This is confirmed in Section 7 (Pin Functions) and Section 9.4 (Device Functional Modes) of the SLUSBA7G datasheet. The low-state default prevents unintended power-switch conduction during brownout or startup, enhancing system safety in critical applications like motor drives and EV chargers. This behavior applies across the full –40°C to +140°C temperature range.
UCC27531DBVT 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:
- 10V ~ 32V
- Logic Voltage - VIL, VIH:
- 1.2V, 2.2V
- Current - Peak Output (Source, Sink):
- 2.5A, 5A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 15ns, 7ns
- Operating Temperature:
- -40°C ~ 140°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
UCC27531DBVT FAQ
1.How can I place an order for UCC27531DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC27531DBVT 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 UCC27531DBVT reliable?
The price and inventory of UCC27531DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC27531DBVT is usually 5 days.
3.What payment methods are accepted for UCC27531DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC27531DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC27531DBVT?
UCC27531DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC27531DBVT 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 UCC27531DBVT?
For technical support, including UCC27531DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC27531DBVT requirements.
6.How does Aetrix verify that UCC27531DBVT is sourced from the original manufacturer or authorized distributors?
All UCC27531DBVT 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 UCC27531DBVT meets industry standards.
7.What is the process for return or replacement of UCC27531DBVT?
All UCC27531DBVT units undergo pre-shipment inspection (PSI). If there is an issue with UCC27531DBVT, 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 UCC27531DBVT part is unused and in its original packaging.
Return procedure for UCC27531DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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