Texas Instruments UCC27538DBVR

Overview

UCC27538DBVR 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 - deployed in SiC FET converters, solar inverters, and motor control systems.

For engineers reviewing the UCC27538DBVR datasheet, UCC27538DBVR pinout, UCC27538DBVR application, or UCC27538DBVR equivalent, key selection criteria include its dual non-inverting inputs (IN1/IN2), SOT-23-6 package, –5-V input tolerance, UVLO with 8.9-V turn-on threshold, and asymmetric drive capability enabling independent turn-on/turn-off slew rate control.

Technical Context

The UCC27538DBVR implements a split-output gate driver topology where OUTH provides dedicated 2.5-A sourcing and OUTL delivers 5-A sinking, decoupling turn-on and turn-off paths to suppress Miller-induced false triggering. Its dual non-inverting inputs (IN1, IN2) support OR-gate logic behavior - output activates when either input is high - with TTL/CMOS-compatible thresholds independent of VDD.

Internal undervoltage lockout (UVLO) holds outputs low until VDD reaches 8.9 V (typical), and input pins tolerate –5 V DC below GND. The device operates across –40°C to 140°C junction temperature and supports 10 V to 35 V VDD, making it suitable for high-reliability industrial power stages.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27531DBVR and UCC27537DBVR, the UCC27538DBVR uniquely combines dual non-inverting inputs with split outputs - enabling both fault-tolerant control logic and independent gate resistance tuning in the same compact SOT-23-6 package, without requiring external logic or layout compromises.

Availability

UCC27538DBVR is available at Aetrix Electronics and suitable for solar inverters, SiC motor drives, and HEV/EV DC-DC converters requiring stable component supply, long-term lifecycle support, and automotive-grade thermal performance.

Supply support for UCC27538DBVR 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, embedded processing, and power management technologies, with leadership in high-reliability industrial and automotive ICs.

The UCC2753x family was designed specifically for high-efficiency, high-frequency power conversion systems using wide-bandgap devices - emphasizing Miller immunity, thermal robustness, and flexible interface options for next-generation inverters and converters.

FAQ

What is the logic behavior of the dual inputs on the UCC27538DBVR?

The UCC27538DBVR implements OR logic across IN1 and IN2: the output goes high when either input is driven high (≥2.0 V), and remains low when both inputs are low (≤1.0 V) or floating. This behavior is confirmed in the device truth table and timing diagrams of the SLUSBA7G datasheet, and enables redundant control or fault-bypass configurations without external logic gates. The UCC27538DBVR does not support AND or XOR functions.

Does the UCC27538DBVR support negative gate drive for improved IGBT turn-off?

Yes - the UCC27538DBVR's OUTL pin can sink 5 A and tolerate –2 V (pulse) or –0.3 V (continuous) below GND, enabling implementation of negative turn-off bias when the GND node is referenced to a negative voltage rail. This capability is explicitly documented in Section 8.1 Absolute Maximum Ratings and supports robust IGBT turn-off in high-noise industrial environments. The UCC27538DBVR does not integrate a negative charge pump; external biasing is required.

What is the recommended minimum VDD bypass capacitance for stable operation of the UCC27538DBVR?

The UCC27538DBVR requires a minimum 1-µF ceramic capacitor placed directly between VDD and GND, as specified in Section 8.5 Electrical Characteristics test conditions and Figure 10 layout guidance. This value ensures low-impedance local energy storage for peak 5-A sink current transients and suppresses supply rail collapse during fast switching. Additional bulk capacitance (e.g., 10 µF tantalum) may be added upstream, but the 1-µF ceramic must be placed within 2 mm of the UCC27538DBVR pins.

How does the UCC27538DBVR handle floating inputs, and what is the default output state?

When both IN1 and IN2 are left floating or unconnected, internal weak pull-down circuitry forces the output low - a safety feature confirmed in Section 5 Description and Section 7 Pin Functions of the datasheet. This behavior prevents unintended power switch activation during startup, reset, or open-circuit faults. The UCC27538DBVR does not require external pull-down resistors to guarantee safe default state.

Can the UCC27538DBVR drive both N-channel and P-channel MOSFETs in high-side configurations?

The UCC27538DBVR is optimized for N-channel MOSFET/IGBT high-side driving when used with external bootstrap or isolated bias supplies - its rail-to-rail OUTH/OUTL outputs swing from GND to VDD, matching standard N-channel gate requirements. It is not designed for direct P-channel high-side drive, as its outputs lack true high-voltage level-shifting capability beyond VDD. For P-channel applications, a dedicated high-side driver with integrated level shifter (e.g., UCC272xx) is recommended instead of the UCC27538DBVR.