Texas Instruments UCC27533DBVR

Overview

UCC27533DBVR from Texas Instruments is a single-channel, high-speed MOSFET/IGBT gate driver in a 5-pin SOT-23 (DBV) package, delivering 2.5-A source and 5-A sink peak output current at 18-V VDD, with 17-ns typical propagation delay and rail-to-rail drive capability-designed for high-efficiency switching in DC-DC converters and SiC FET power stages.

For engineers reviewing the UCC27533DBVR datasheet, UCC27533DBVR pinout, UCC27533DBVR application, or UCC27533DBVR equivalent, this device offers dual-input (inverting/non-inverting) logic compatibility, –5-V input tolerance below ground, undervoltage lockout (UVLO), and operation across –40°C to 140°C junction temperature-key for robust power stage control in automotive and industrial inverters.

Technical Context

The UCC27533DBVR implements dual complementary inputs (IN+ and IN−) enabling configurable inverting or non-inverting logic behavior without external components. Its asymmetrical drive architecture separates sourcing (2.5 A) and sinking (5 A) paths internally, enhancing immunity to Miller-induced false turn-on during high-dV/dt switching events.

It features TTL/CMOS-compatible input thresholds independent of VDD, UVLO with 8.9-V turn-on and 8.2-V turn-off thresholds, and output pins rated for continuous operation up to 35-V VDD. The device holds output low when inputs are floating or during UVLO, ensuring fail-safe gate control in power systems.

Key Specifications

Pinout & Package

UCC27533DBVR uses the 5-pin SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected. Pin 1 is VDD; pin 2 is GND; pins 3 and 4 are IN+ and IN− (differential inputs); pin 5 is OUT (combined source/sink output).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar gate driver applications.

Compared with UCC27537DBVR and UCC27536DBVR, the UCC27533DBVR uniquely delivers dual-input configurability without an enable pin, optimizing PCB layout and gate-drive robustness for high-reliability SiC/IGBT half-bridges where Miller immunity is critical.

Availability

UCC27533DBVR is available at Aetrix Electronics and suitable for switched-mode power supplies, solar inverters, and HEV/EV on-board chargers requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for UCC27533DBVR 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 decades of expertise in high-performance power IC design.

The UCC2753x family was developed specifically for high-efficiency, high-frequency power conversion systems-targeting SiC, GaN, and IGBT-based topologies in automotive, renewable energy, and industrial motor control.

FAQ

What is the maximum VDD voltage rating for UCC27533DBVR?

The UCC27533DBVR has an absolute maximum VDD rating of 35 V, with recommended operating range from 10 V to 32 V. Operation at 35 V is limited to short-duration transients per Absolute Maximum Ratings; sustained use above 32 V risks reliability degradation. The UCC27533DBVR UVLO remains active within its specified 8.2–8.9 V window regardless of VDD level.

Does UCC27533DBVR support both inverting and non-inverting logic configurations?

Yes, the UCC27533DBVR supports both modes using its dual-input structure: driving IN+ high while holding IN− low yields non-inverting behavior; driving IN− high while holding IN+ low yields inverting behavior. This eliminates external logic gates and simplifies control architecture in multi-topology power converters. The UCC27533DBVR datasheet confirms this in the Pin Functions and Device Comparison Table sections.

What is the purpose of the –5-V input tolerance on UCC27533DBVR's IN+ and IN− pins?

The –5-V DC input tolerance on UCC27533DBVR's IN+ and IN− pins allows the device to withstand negative voltage transients-common in isolated gate-drive circuits due to transformer leakage inductance or parasitic coupling-without damage or false triggering. This specification removes the need for external Schottky clamps in most industrial and automotive designs, reducing component count and board area. The UCC27533DBVR maintains functional integrity down to –5 V per JEDEC JESD78 guidelines.

How does UCC27533DBVR handle floating inputs?

When both IN+ and IN− are left floating, the UCC27533DBVR's internal circuitry pulls the output low-ensuring the driven power switch remains safely off during power-up, reset, or controller disconnection. This fail-safe behavior is explicitly documented in the UCC27533DBVR datasheet Description section and verified across –40°C to 140°C. It eliminates risk of unintended turn-on in unpowered or uninitialized states.

Can UCC27533DBVR drive SiC MOSFETs effectively?

Yes, the UCC27533DBVR is well-suited for SiC MOSFET gate driving: its 2.5-A source / 5-A sink capability enables fast turn-on and aggressive turn-off critical for minimizing switching losses in >100-kHz SiC topologies; 15-ns rise / 7-ns fall times preserve edge fidelity; and 17-ns propagation delay reduces timing uncertainty. TI application notes confirm successful use with 650-V and 1200-V SiC devices in solar and EV charger designs.