Texas Instruments UCC37324P

Overview

UCC37324P 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 / 15 ns fall time (1.8 nF load), 35 ns/25 ns propagation delay, and operation across 4.5–15 V supply voltage - used to drive N-channel power MOSFETs in high-frequency switch-mode power supplies.

For engineers reviewing the UCC37324P datasheet, UCC37324P pinout, UCC37324P application, or UCC37324P equivalent, this page delivers verified functional identity, SOIC-8 package mapping, confirmed dual noninverting logic behavior, thermal resistance (R_θJA = 107.3°C/W), and real-world gate-drive timing under load - critical for synchronous rectification, DC-DC converter layout, and thermal reliability validation.

Technical Context

The UCC37324P implements a Bi-CMOS hybrid output stage combining bipolar and MOSFET transistors in parallel to sustain ±4 A peak current even at low V_DD (4.5 V), enabling robust Miller plateau charging/discharging. 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-voltage independent.

It operates over 0°C to +70°C ambient temperature, supports paralleling of OUTA/OUTB for higher drive current, and uses industry-standard SOIC-8 pinout with two no-connect pins (1 and 8). Input logic states directly control noninverting outputs: INA → OUTA, INB → OUTB, with GND-referenced return path and V_DD-referenced supply.

Key Specifications

Pinout & Package

UCC37324P is housed in an 8-pin SOIC (D) package (4.90 mm × 3.91 mm), thermally optimized for PCB-mounted power applications. Pin 1 and Pin 8 are no-connect (N/C); GND (Pin 3) must be tied directly to MOSFET source ground; V_DD (Pin 6) requires local 0.1 µF ceramic bypassing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27324P, UCC27324D offers wider temperature range and identical drive capability - making it a direct upgrade for harsh environments; TC4427ACOA provides lower-cost, lower-drive alternative but cannot replace UCC37324P in high-current, high-frequency power stages.

Availability

UCC37324P is available at Aetrix Electronics and suitable for switch-mode power supplies, DC-DC converters, and uninterruptible power supplies requiring stable component supply and long-term industrial availability.

Supply support for UCC37324P 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 drivers and power system solutions.

The UCC37324P belongs to the UCCx732x dual MOSFET driver product line, designed specifically for high-efficiency, high-frequency power conversion where precise, high-current gate drive is essential to minimize switching losses.

FAQ

What is the logic configuration of the UCC37324P?

The UCC37324P features dual noninverting outputs: INA controls OUTA with identical logic polarity, and INB controls OUTB with identical logic polarity. This configuration eliminates need for external inverters in synchronous rectifier or dual-phase buck designs. The UCC37324P truth table confirms both outputs go high when respective inputs go high - verified in TI SLUS492K datasheet Section 7.4.

Can the UCC37324P drive P-channel MOSFETs?

No - the UCC37324P is a low-side driver with outputs referenced to GND and swinging from GND to V_DD; it cannot drive P-channel high-side MOSFETs requiring negative gate-source voltage. For P-channel drive, use UCC37323P (dual inverting) or dedicated high-side drivers like UCC27531. The UCC37324P datasheet explicitly states its outputs are intended for N-channel MOSFETs.

What is the maximum capacitive load the UCC37324P can drive reliably?

The UCC37324P is characterized up to 10 nF load in TI application notes (Figure 8-5), delivering linear rise/fall edges due to constant-current output behavior. At 1.8 nF, it achieves 20 ns/15 ns rise/fall; at 10 nF, rise/fall extends to ~60 ns but remains monotonic. Driving >15 nF risks excessive power dissipation - confirmed by Equation 6 (P = V × Q_g × f) in SLUS492K Section 8.2.2.4.

Does the UCC37324P require external gate resistors?

External gate resistors are optional but recommended for EMI control and shoot-through mitigation. The UCC37324P drives gates directly without series resistance; however, TI recommends adding matched resistors (e.g., 5–10 Ω each) in series with OUTA/OUTB when paralleling channels or driving large Q_g devices - per Figure 8-4 and Section 8.2.2.2 of the UCC37324P datasheet.

Is the UCC37324P pin-compatible with other UCCx732x variants?

Yes - all UCCx732x devices (UCC27323/4/5, UCC37323/4/5) share identical SOIC-8 (D) and MSOP-PowerPAD (DGN) packages and pinout, including N/C pins at 1 and 8. The UCC37324P can replace UCC27324D electrically and mechanically, though temperature rating differs. Pin compatibility is confirmed in TI SLUS492K Table 4 and Figure 5-1.