Texas Instruments UCC27531DBVR

Overview

UCC27531DBVR 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 high-efficiency DC-DC converters and SiC FET-based solar inverters.

For engineers reviewing the UCC27531DBVR datasheet, UCC27531DBVR pinout, UCC27531DBVR application, or UCC27531DBVR equivalent, key selection criteria include asymmetric drive capability for Miller immunity, –5-V input tolerance, UVLO with 8.9-V turn-on threshold, and SOT-23-6 package compatibility with layout-constrained power stages.

Technical Context

The UCC27531DBVR implements a non-inverting, enable-controlled gate driver topology with independent OUTH (source) and OUTL (sink) terminals, enabling discrete tuning of turn-on and turn-off slew rates via external resistors. Its TTL/CMOS-compatible input threshold is supply-independent, and internal UVLO holds outputs low until VDD exceeds 8.9 V.

Designed for high-side or low-side switching (with proper bias/isolation), it supports negative turn-off bias up to –5 V on IN/EN pins and features robust ESD protection (±4000-V HBM). The device operates across –40°C to 140°C junction temperature with 10–32-V recommended VDD range.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm max height, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27531DBVR, UCC27538DBVR adds dual-input flexibility but removes enable control, while TPS2828DBVR offers lower cost and footprint compatibility but sacrifices 5-A sink capability and Miller immunity tuning - making UCC27531DBVR optimal for high-reliability SiC/IGBT systems requiring robust turn-off control.

Availability

UCC27531DBVR is available at Aetrix Electronics and suitable for switched-mode power supplies, solar inverters, and EV on-board chargers requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for UCC27531DBVR 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 over 90 years of innovation in industrial, automotive, and communications markets.

The UCC2753x family was designed specifically for high-efficiency power conversion systems demanding fast, robust, and configurable gate driving of wide-bandgap and silicon power switches.

FAQ

What is the maximum allowable VDD voltage for UCC27531DBVR?

The absolute maximum VDD rating for UCC27531DBVR is 35 V, but the recommended operating range is 10 V to 32 V. Operation above 32 V risks exceeding internal voltage tolerances and may degrade long-term reliability, especially at elevated temperatures. TI specifies 18 V as the nominal test condition for key parameters like propagation delay and output current.

Does UCC27531DBVR support high-side gate driving without additional level-shifting circuitry?

UCC27531DBVR is not a floating high-side driver and does not integrate bootstrap or level-shift circuitry. It can be used in high-side configurations only when supplied with an isolated or level-shifted VDD/GND reference - such as via a dedicated isolated DC-DC converter or transformer-coupled gate drive. Its –5-V input tolerance helps tolerate ground offset during switching transitions.

How does the split-output configuration (OUTH/OUTL) improve system reliability in SiC applications?

The split outputs of UCC27531DBVR allow independent gate resistors on OUTH (turn-on) and OUTL (turn-off), enabling precise control of dV/dt during both edges. This suppresses parasitic Miller turn-on in SiC MOSFETs during high dv/dt commutation - a leading cause of shoot-through failure - thereby improving robustness without adding external active circuitry.

What happens to the outputs of UCC27531DBVR when the IN pin is left floating?

When the IN pin is left floating, the internal circuitry pulls the output low - both OUTH and OUTL remain inactive. This fail-safe behavior, combined with UVLO holding outputs low during VDD undervoltage, ensures the driven power switch stays off during undefined logic states or controller reset conditions, preventing unintended conduction.

Is UCC27531DBVR pin-compatible with any other TI gate drivers?

UCC27531DBVR is not pin-compatible with TPS2828/TPS2829 - those devices use a different pinout (e.g., VDD on Pin 5, GND on Pin 2). However, UCC27536DBVR and UCC27537DBVR share the same SOT-23-5 footprint but differ in functionality (single output, no split drive). For drop-in replacement, UCC27538DBVR matches the SOT-23-6 package and split-output structure but uses dual inputs instead of EN+IN.