Texas Instruments UCC27424D

Overview

UCC27424D from Texas Instruments is a dual-channel, non-inverting, low-side MOSFET driver IC delivering ±4 A peak output current per channel, 20-ns rise/15-ns fall times (1.8-nF load), and 4–15 V supply operation - designed for high-efficiency gate driving in synchronous buck converters and half-bridge topologies.

For engineers reviewing the UCC27424D datasheet, UCC27424D pinout, UCC27424D application, or UCC27424D equivalent, this page delivers verified package mapping (SOIC-8), confirmed dual non-inverting logic, validated enable functionality on pins 1/8, thermal resistance (R_θJA = 107.3°C/W), and real-world switching performance metrics under 1.8-nF load conditions.

Technical Context

The UCC27424D implements a unique bipolar-MOSFET hybrid output stage that concurrently sources and sinks high current at the Miller plateau region, minimizing switching losses during MOSFET transition. Its dual non-inverting architecture ensures direct logic alignment with PWM controllers driving N-channel MOSFETs.

Each channel features independent active-high enable inputs (ENBA/ENBB) with internal 100-kΩ pull-up resistors and 0.15–0.90 V hysteresis, enabling precise sequencing control without external biasing. Input thresholds remain TTL/CMOS-compatible across the full 4–15 V V_DD range, supporting 3.3 V and 5 V logic interfaces.

Key Specifications

Pinout & Package

UCC27424D uses the standard SOIC-8 (D) package (4.90 mm × 3.91 mm), thermally rated for 650 mW at T_A = 25°C and R_θJA = 107.3°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27424DGN, the UCC27424D offers identical drive strength and logic but higher thermal resistance - making it optimal for moderate-power, cost-sensitive designs where SOIC-8 placement and rework compatibility are prioritized. Compared with LM5112MG/NOPB, UCC27424D provides dual-channel control and enable functionality essential for multi-phase topologies, despite slightly slower edge rates.

Availability

UCC27424D is available at Aetrix Electronics and suitable for switch mode power supplies, DC/DC converters, and motor controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for UCC27424D 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 ICs, with over 50 years of innovation in high-reliability power conversion solutions.

The UCC27424D belongs to TI's UCC2742x family of high-speed MOSFET drivers - engineered specifically for efficient, low-loss gate driving in high-frequency power topologies including synchronous rectifiers, LLC resonant converters, and multi-phase VRMs.

FAQ

What is the maximum capacitive load the UCC27424D can drive while maintaining specified rise/fall times?

The UCC27424D is characterized for 20 ns rise / 15 ns fall times with a 1.8-nF load, per the official datasheet (SLUS545F). While it can drive larger loads (e.g., 10 nF), measured rise/fall times increase to ~40 ns. For designs requiring sub-25 ns edges, keep total gate capacitance ≤2.2 nF - including MOSFET C_iss, PCB trace capacitance, and any added gate resistor parasitics. The UCC27424D remains functional beyond 1.8 nF, but timing margins must be re-verified in-system.

Can the UCC27424D drive both N-channel and P-channel MOSFETs simultaneously?

No - the UCC27424D has dual non-inverting outputs, meaning both OUTA and OUTB follow their respective inputs (INA and INB) with identical polarity. It is designed exclusively for low-side N-channel MOSFET driving. To drive a P-channel high-side device, a dedicated high-side driver (e.g., UCC27524) or level-shifting circuit is required. Attempting to use UCC27424D for high-side P-MOSFET gate control will result in incorrect logic inversion and potential shoot-through.

Is the UCC27424D pin-compatible with the older UCC27324?

Yes - the UCC27424D maintains industry-standard SOIC-8 pinout compatibility with the UCC27324, including identical pin assignments for V_DD, GND, INA, INB, OUTA, and OUTB. Pins 1 (ENBA) and 8 (ENBB) are repurposed as enable inputs (internally pulled up), whereas they were no-connects on UCC27324. Leaving ENBA/ENBB unconnected preserves full functional compatibility, making UCC27424D a direct drop-in upgrade with added control capability.

What happens to the outputs of the UCC27424D when the enable pins are left floating?

When ENBA and ENBB are left floating, the internal 100-kΩ pull-up resistors bias them to V_DD, placing both drivers in enabled state - matching standard operation. However, TI strongly recommends minimizing PCB trace length to these pins and avoiding long stubs, as floating enables are susceptible to noise-induced false disabling. For noise-critical applications, tie ENBA/ENBB directly to V_DD or add a 0.1-μF bypass capacitor to GND - both methods ensure deterministic behavior in the UCC27424D.

Does the UCC27424D support paralleling of its two outputs for higher current drive?

Yes - the UCC27424D datasheet explicitly states "Dual Outputs Can Be Paralleled for Higher Drive Current." When OUTA and OUTB are shorted together and driven by the same input (INA = INB), the combined peak current capability reaches ±8 A. This configuration requires matched layout (equal trace lengths, shared ground plane) and a single 0.1-μF ceramic decoupling cap near the paralleled outputs. Note: ENBA and ENBB must both be asserted (high) to activate both channels simultaneously in this mode.