Texas Instruments UCC37323P

Overview

UCC37323P from Texas Instruments is a dual low-side MOSFET driver IC with dual-inverting logic configuration, delivering ±4-A peak gate drive current at the Miller plateau region, 20-ns rise/15-ns fall time (1.8-nF load), and operation across 4.5–15-V supply voltage - used to drive high-speed power switches in DC-DC converters and UPS systems.

For engineers reviewing the UCC37323P datasheet, UCC37323P pinout, UCC37323P application, or UCC37323P equivalent, this page delivers verified electrical specs, thermal performance data, input threshold behavior across VDD, parallel-output implementation guidance, and validated alternatives for industrial power design validation.

Technical Context

The UCC37323P implements a Bi-CMOS hybrid output stage-combining bipolar and MOSFET transistors in parallel-to sustain ±4-A peak sourcing/sinking capability even at low VDD (4.5 V), while maintaining constant-current drive during Miller plateau transitions. Its TTL/CMOS-compatible inputs feature wide hysteresis (VIN_H = 1.6–2.5 V, VIN_L = 0.8–1.5 V) and are fully independent of supply voltage.

It operates in the 0°C to +70°C ambient temperature range and uses an industry-standard 8-pin PDIP package with two no-connect pins (Pin 1 and Pin 8). The device supports paralleling of OUTA and OUTB for combined 8-A drive, provided INA and INB are shorted at the IC pad with fast-rising input edges (>20 V/µs) to minimize channel skew.

Key Specifications

Pinout & Package

UCC37323P uses an 8-pin PDIP (Plastic Dual In-line Package) measuring 9.27 mm × 6.35 mm, with exposed substrate ground connection via internal die attach (no thermal pad). Pins 1 and 8 are internally unconnected and must remain floating or tied to GND per layout best practice.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC37323D and TC4427ACPA, the UCC37323P uniquely combines PDIP manufacturability, ±4-A Miller-plateau current, and 0°C–70°C commercial rating - making it optimal for lab validation, low-volume industrial UPS modules, and legacy through-hole power board upgrades.

Availability

UCC37323P is available at Aetrix Electronics and suitable for switch-mode power supplies, DC-DC converters, and uninterruptible power supplies requiring stable component supply across commercial temperature ranges and through-hole assembly compatibility.

Supply support for UCC37323P 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 company headquartered in Dallas, Texas, designing analog, embedded processing, and power management ICs for industrial, automotive, and communications markets.

The UCC37323P belongs to TI's UCCx732x dual MOSFET driver product line, engineered specifically for high-efficiency, high-frequency power conversion systems requiring robust gate drive with minimal propagation delay and Miller-region current boost.

FAQ

What is the maximum operating junction temperature for UCC37323P?

The UCC37323P has a maximum junction temperature of +150°C per absolute maximum ratings, but its recommended operating junction temperature is limited to 0°C to +70°C ambient due to its commercial-grade qualification. Derating is required above 50°C ambient to maintain reliability; thermal design must ensure RθJA ≤ 55.5°C/W with adequate PCB copper area.

Can UCC37323P drive P-channel MOSFETs directly?

No - the UCC37323P is a low-side driver with outputs referenced to GND; it cannot directly drive P-channel high-side switches. Its dual-inverting logic is intended for N-channel MOSFETs configured as low-side switches or synchronous rectifiers. For P-channel high-side drive, a level-shifting circuit or dedicated high-side driver like the UCC27201 is required.

Does UCC37323P support paralleling of both channels for higher current?

Yes - UCC37323P supports paralleling of OUTA and OUTB to achieve up to ±8-A peak drive. This requires shorting INA and INB together at the IC pad (not at the controller), tying OUTA and OUTB directly, and using matched external gate resistors if present. Input edge rate must exceed 20 V/µs to prevent channel skew.

What bypass capacitors are required for stable UCC37323P operation?

UCC37323P requires two VDD bypass capacitors: a 0.1-µF X7R ceramic capacitor placed within 2 mm of Pin 6 (VDD) to GND, and a ≥1-µF low-ESR tantalum or ceramic capacitor in parallel. This dual-capacitor network maintains low impedance across 100 kHz–100 MHz, suppressing supply rail collapse during ±4-A current transients.

Is UCC37323P pin-compatible with UCC27323P?

No - UCC37323P and UCC27323P share identical pinout and logic function, but differ in temperature rating: UCC37323P is rated for 0°C to +70°C ambient, while UCC27323P supports –40°C to +125°C. Electrical specs are otherwise identical; substitution is possible only if the application stays within the narrower UCC37323P temperature range.