Texas Instruments UCC27512MDRSTEP

Overview

UCC27512MDRSTEP from Texas Instruments is a single-channel, high-speed, low-side gate driver IC designed for driving MOSFETs and IGBTs in power conversion circuits. It delivers 4-A peak source and 8-A peak sink current, features 13-ns typical propagation delay, operates from 4.5 V to 18 V supply, and supports –55°C to 125°C industrial/military temperature range - enabling robust GaN-based DC-DC converter designs.

For engineers reviewing the UCC27512MDRSTEP datasheet, UCC27512MDRSTEP pinout, UCC27512MDRSTEP application, or UCC27512MDRSTEP equivalent, key selection considerations include asymmetrical drive strength, UVLO behavior during power-up/down, dual-input logic flexibility (IN+/IN−), thermal performance in the 3 mm × 3 mm WSON package, and compatibility with 3.3-V/5-V digital controllers.

Technical Context

The UCC27512MDRSTEP employs a split-output architecture (OUTH/OUTL) enabling independent optimization of turn-on and turn-off dynamics. Its TTL/CMOS-compatible input stage features voltage-independent thresholds (typical 2.2 V high / 1.2 V low) with 1-V hysteresis for noise immunity.

An internal under-voltage lockout (UVLO) circuit holds the output low when VDD falls below 3.9 V (typical turn-off) and releases at 4.2 V (typical turn-on), ensuring glitch-free startup and shutdown. The device uses a P-channel pull-up and N-channel pull-down output stage, yielding 0.375 Ω typical pull-down resistance and strong Miller immunity.

Key Specifications

Pinout & Package

UCC27512MDRSTEP is housed in a thermally enhanced 6-pin DRS (3 mm × 3 mm WSON) package with exposed thermal pad for PCB heat dissipation. Pin 2 and Pin 5 are both GND terminals - recommended to be connected to a common ground plane near the device.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27512MDRSTEP, UCC27511MDRSTEP trades Miller immunity for symmetrical drive simplicity, while LM5113SDX/NOPB adds channel integration at the expense of package size and temperature qualification - making UCC27512MDRSTEP optimal for compact, high-reliability GaN/SiC low-side drive.

Availability

UCC27512MDRSTEP is available at Aetrix Electronics and suitable for switch-mode power supplies, solar microinverters, and GaN-based DC-DC converters requiring stable component supply across extended temperature and long product lifecycles.

Supply support for UCC27512MDRSTEP 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 heritage in high-reliability analog IC design.

The UCC27512MDRSTEP belongs to TI's UCC275xx family of high-speed gate drivers, engineered specifically for demanding power conversion applications involving wide-bandgap devices, high-frequency switching, and ruggedized industrial/military environments.

FAQ

What is the maximum operating junction temperature for UCC27512MDRSTEP?

The UCC27512MDRSTEP is rated for a junction temperature range of –55°C to 125°C, with absolute maximum junction temperature specified at 150°C. Its 3 mm × 3 mm WSON package with exposed thermal pad enables efficient heat transfer to the PCB, supporting sustained operation at 125°C ambient in properly designed layouts with adequate copper area and airflow.

Does UCC27512MDRSTEP support both inverting and non-inverting configurations?

Yes, UCC27512MDRSTEP supports both configurations via its dual-input architecture. For non-inverting operation, apply PWM to IN+ and tie IN− to GND; for inverting operation, apply PWM to IN− and tie IN+ to VDD. Unused inputs can also serve as enable/disable controls - for example, pulling IN− high disables output in non-inverting mode. This flexibility eliminates need for external logic gates.

How does the UVLO feature behave during power-up in UCC27512MDRSTEP?

In UCC27512MDRSTEP, the UVLO circuit holds the OUT pin low until VDD rises above 4.2 V (typical turn-on threshold). Once enabled, output follows input logic. During power-down, output remains active until VDD drops below 3.9 V (typical turn-off threshold), then reverts to low state. This hysteresis prevents oscillation during supply droop and ensures deterministic startup in systems with slow-ramping rails.

Can UCC27512MDRSTEP drive GaN power devices effectively?

Yes, UCC27512MDRSTEP is explicitly optimized for GaN devices: its 4.5-V minimum VDD supports 5-V gate drive rails used with eGaN® FETs, its 8-A sink current combats Miller turn-on in high-dV/dt GaN switching, and its 13-ns propagation delay enables precise timing control at >1 MHz frequencies. TI's datasheet cites "Gate Driver for Emerging Wide Band-Gap Power Devices (such as GaN)" as a primary application.

What is the purpose of the dual GND pins (pins 2 and 5) on UCC27512MDRSTEP?

Pins 2 and 5 on UCC27512MDRSTEP are separate GND terminals intended to minimize ground path inductance and improve high-frequency stability. Pin 2 serves as signal ground reference for inputs, while Pin 5 provides dedicated return path for output current. Both must be connected to a low-impedance ground plane using short, wide traces - ideally joined near the device with a thermal pad connection - to reduce noise coupling and ensure clean switching edges.