Texas Instruments UCC27423D

Overview

UCC27423D from Texas Instruments is a dual low-side MOSFET driver with dual inverting outputs, ±4-A peak source/sink current capability, 20-ns typical rise time and 15-ns typical fall time (1.8-nF load), 4-V to 15-V supply range, and –40°C to 125°C operating temperature - used to drive N-channel power MOSFETs in high-frequency switch-mode power supplies.

For engineers reviewing the UCC27423D datasheet, UCC27423D pinout, UCC27423D application, or UCC27423D equivalent, this page delivers verified technical context, SOIC-8 package mapping, real-world switching timing data, enable-controlled dual-channel operation, and validated alternative options for gate driver selection in DC/DC converters and motor control designs.

Technical Context

The UCC27423D implements a unique bipolar-MOSFET hybrid output stage that delivers ±4 A precisely at the Miller plateau region during MOSFET switching transitions, minimizing shoot-through risk while maintaining high efficiency. Its dual inverting logic configuration (OUTA and OUTB both invert input signals) enables direct interfacing with PWM controllers requiring inverted gate drive polarity.

Each channel features independent TTL/CMOS-compatible enable inputs (ENBA on Pin 1, ENBB on Pin 8), internally pulled up to VDD via 100-kΩ resistors for active-high operation. The device operates across 4–15 V supply voltage and supports parallel output operation for combined 8-A drive capability - confirmed in electrical characteristics and functional mode tables.

Key Specifications

Pinout & Package

UCC27423D is packaged in an 8-pin SOIC (D) body measuring 4.90 mm × 3.91 mm with standard industry footprint and thermal performance (R_θJA = 107.3°C/W). This package supports tape-and-reel delivery (UCC27423DR) and is compatible with automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27423DGN, the UCC27423D offers lower cost and broader PCB assembly compatibility but higher thermal resistance; versus LM5113SD, it provides superior system-level control via dedicated ENBA/ENBB pins and guaranteed dual inverting logic - critical for synchronous rectifier timing integrity.

Availability

UCC27423D is available at Aetrix Electronics and suitable for switch-mode power supplies, DC/DC converters, and motor controllers requiring stable component supply, long-term industrial lifecycle support, and consistent SOIC-8 sourcing.

Supply support for UCC27423D 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 50 years of innovation in high-reliability industrial and automotive components.

The UCC27423D belongs to TI's high-speed MOSFET driver product line, engineered specifically for efficient, robust gate driving in high-frequency power conversion systems - emphasizing Miller-region current delivery, thermal resilience, and noise-immune logic interface.

FAQ

What is the logic configuration of UCC27423D?

The UCC27423D features dual inverting outputs: OUTA inverts INA, and OUTB inverts INB. This configuration is explicitly defined in TI's SLUS545F device comparison table and truth table (Table 7-2), making UCC27423D suitable for topologies requiring inverted gate drive signals such as synchronous buck converters. It differs from UCC27424D (dual non-inverting) and UCC27425D (mixed inverting/non-inverting).

Does UCC27423D support independent channel enable control?

Yes, UCC27423D provides two dedicated enable inputs: ENBA (Pin 1) controls OUTA, and ENBB (Pin 8) controls OUTB. Both are active-high, internally pulled up to VDD via 100-kΩ resistors. When either enable pin is driven low, its corresponding output is forced low regardless of input state - enabling per-channel fault shutdown or phase management in multi-phase UCC27423D-based designs.

What is the maximum capacitive load UCC27423D can drive with specified timing?

The UCC27423D's 20-ns rise time and 15-ns fall time are characterized with a 1.8-nF load per output, as stated in the Features section and Table 6-5 of SLUS545F. While the device can drive larger loads (e.g., 10-nF), timing degrades linearly - rise/fall times exceed 40 ns above 4.7 nF. For reliable sub-25-ns switching, keep total gate capacitance ≤1.8 nF per channel, including PCB trace capacitance.

Can UCC27423D drive P-channel MOSFETs?

No - UCC27423D is a low-side driver optimized for N-channel MOSFETs. Its outputs swing from GND to VDD and lack high-side level-shifting capability. Although the inverting logic could theoretically interface with P-MOSFET sources tied to VDD, UCC27423D does not provide the required gate-to-source voltage margin or shoot-through protection for high-side use. TI explicitly states OUTA/OUTB are intended for N-channel devices in Section 7.3.3.

What thermal considerations apply to UCC27423D in SOIC-8 package?

UCC27423D in SOIC-8 (D) has a junction-to-ambient thermal resistance (R_θJA) of 107.3°C/W. At 15-V supply and 4-A peak current, power dissipation reaches ~0.65 W - raising junction temperature by ~70°C above ambient. To maintain T_J ≤125°C, ambient must stay ≤55°C with standard 2-layer PCB; adding copper pour under Pin 3 (GND) reduces R_θJA by up to 15°C/W per TI layout guidelines (Section 10.2).