Texas Instruments UCC37324D

Overview

UCC37324D from Texas Instruments is a dual noninverting low-side MOSFET driver IC delivering ±4-A peak gate drive current at the Miller plateau region, with 20-ns rise and 15-ns fall times into 1.8-nF load, operating from 4.5 V to 15 V supply, and designed for high-frequency switch-mode power supplies requiring robust, thermally efficient gate driving.

For engineers reviewing the UCC37324D datasheet, UCC37324D pinout, UCC37324D application, or UCC37324D equivalent, this page delivers verified electrical specs, SOIC-8 package layout, dual-channel noninverting logic behavior, thermal resistance (107.3°C/W), and real-world selection guidance against comparable drivers - all grounded in TI's SLUS492K production data sheet.

Technical Context

The UCC37324D implements a Bi-CMOS hybrid output stage-parallel bipolar and MOSFET transistors-that sustains ±4-A peak sourcing/sinking capability even at low VDD (4.5 V), enabling strong Miller plateau drive without voltage droop. Its TTL/CMOS-compatible inputs feature wide hysteresis (VIN_H = 1.6–2.5 V, VIN_L = 0.8–1.5 V) and are supply-independent, ensuring noise immunity across 0–15-V input swing.

Functionally, both channels are noninverting: INA → OUTA, INB → OUTB. The device operates over 0°C to +70°C ambient (UCC3732x grade), supports output paralleling for up to 8-A drive, and uses dedicated GND and VDD pins with two no-connect (N/C) terminals-optimized for low-inductance PCB layout and minimal shoot-through risk during MOSFET switching transitions.

Key Specifications

Pinout & Package

UCC37324D is housed in an industry-standard SOIC-8 (D) package (4.90 mm × 3.91 mm), featuring exposed pad-less construction and optimized thermal path through leads. Pin 1 and Pin 8 are no-connect (N/C); Pin 3 is GND; Pin 6 is VDD; Pins 2 and 4 are logic inputs (INA, INB); Pins 5 and 7 are outputs (OUTB, OUTA).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27324D, UCC27324D offers wider temperature capability but identical performance and layout; TC4427ACOA provides pin-compatible fallback at reduced drive strength and thermal margin-neither is drop-in, but both require validation for gate charge and thermal design.

Availability

UCC37324D is available at Aetrix Electronics and suitable for switch-mode power supplies, DC-DC converters, and solar inverters requiring stable component supply, long-term industrial lifecycle support, and consistent SOIC-8 packaging across production batches.

Supply support for UCC37324D 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 decades of expertise in high-speed gate driver design and industrial-grade reliability validation.

The UCC3732x product line was engineered specifically for high-efficiency, high-frequency power conversion systems-delivering robust ±4-A Miller plateau drive in compact SOIC-8 and MSOP-PowerPAD packages to replace discrete transistor-based gate buffers.

FAQ

What is the maximum operating temperature for UCC37324D?

The UCC37324D is rated for 0°C to +70°C ambient operating temperature (commercial grade). Its junction temperature must not exceed +150°C under any condition. Thermal design must account for θJA = 107.3°C/W in SOIC-8; for higher ambient or continuous 4-A operation, use thermal vias and copper pour. The UCC37324D does not support extended temperature ranges like the –40°C to +125°C UCC27324D variant.

Can UCC37324D drive SiC MOSFETs effectively?

Yes, the UCC37324D can drive SiC MOSFETs due to its ±4-A peak current, fast 20/15-ns edges, and ability to sustain drive strength down to 4.5-V VDD-critical for low-Vth SiC devices during cold startup. However, verify gate resistor selection to limit dV/dt and avoid overshoot; SiC gate charge (Qg) typically exceeds 100 nC, so ensure total gate loop inductance remains <10 nH for stable switching with UCC37324D.

Is UCC37324D pin-compatible with UCC27324D?

Yes, UCC37324D and UCC27324D share identical SOIC-8 (D) pinout, pin functions, and logic configuration (dual noninverting). The sole functional difference is temperature grade: UCC37324D is 0°C to +70°C, while UCC27324D is –40°C to +125°C. No PCB changes are required for substitution-but thermal and reliability validation is mandatory if operating above 70°C ambient.

How do I configure UCC37324D for single-output 8-A drive?

To achieve 8-A peak drive, parallel OUTA and OUTB by shorting them together at the driver output pad (not at the MOSFET gate), and tie INA and INB together at the input pad-both connections must be made with minimal trace length and symmetry to prevent channel mismatch. Do not add series gate resistors on individual outputs; instead, place one shared resistor between the paralleled outputs and the MOSFET gate to maintain balance and reduce ringing.

Does UCC37324D require external pull-up or pull-down resistors on INA/INB?

No-UCC37324D inputs have built-in hysteresis and rail-to-rail compatibility, but unused inputs (INA or INB) must be hard-wired to either VDD or GND; floating inputs are prohibited and may cause erratic output behavior or increased supply current. If both channels are used, no external resistors are needed-the UCC37324D accepts direct PWM or logic-level signals without conditioning.