Texas Instruments UCC27425P

Overview

UCC27425P from Texas Instruments is a dual low-side MOSFET driver with one inverting (OUTA) and one non-inverting (OUTB) output channel, ±4-A peak source/sink current capability, 20-ns rise / 15-ns fall time (1.8-nF load), 4–15-V supply range, and integrated enable inputs (ENBA/ENBB) for independent channel control - used in synchronous rectification and half-bridge gate drive stages of high-frequency DC/DC converters.

For engineers reviewing the UCC27425P datasheet, UCC27425P pinout, UCC27425P application, or UCC27425P equivalent, this page delivers verified electrical specs, thermal performance data, SOIC-8 package mapping, real-world switching behavior at Miller plateau, and validated alternative options for industrial power design.

Technical Context

The UCC27425P implements a unique bipolar-MOSFET hybrid output stage that delivers ±4 A simultaneously during the Miller plateau region, minimizing switching losses in N-channel and P-channel MOSFETs driven by its complementary logic outputs. Its enable inputs (ENBA/ENBB) are internally pulled up to VDD via 100-kΩ resistors and support active-high operation without external biasing.

It operates across –40°C to +125°C junction temperature with TTL/CMOS-compatible inputs independent of VDD, propagation delays of 25 ns (rising edge) and 35 ns (falling edge), and input thresholds (VIN_H = 2.2 V typ, VIN_L = 1.2 V typ) optimized for 3.3-V and 5-V controller interfaces.

Key Specifications

Pinout & Package

UCC27425P is housed in an 8-pin PDIP (Plastic Dual In-line Package) with 0.300-inch body width and through-hole mounting. Thermal resistance RθJA = 55.5°C/W enables operation up to 125°C ambient in properly vented PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27425P, the D variant trades thermal performance for SMT manufacturability, while the DGN variant delivers superior power handling in minimal area - all share identical logic function, timing, and drive strength, enabling direct substitution based on mechanical and thermal constraints rather than electrical redesign.

Availability

UCC27425P is available at Aetrix Electronics and suitable for switch mode power supplies, DC/DC converters, motor controllers, and Class D switching amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for UCC27425P 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 decades of expertise in high-reliability power IC design.

The UCC2742x family was engineered specifically for high-efficiency, high-frequency power conversion systems - delivering robust gate drive with minimized shoot-through risk, thermal resilience, and seamless integration into digital power architectures.

FAQ

What logic configuration does UCC27425P implement?

UCC27425P implements one inverting output (OUTA) and one non-inverting output (OUTB). This configuration allows direct drive of complementary MOSFET pairs - for example, OUTA controls a P-channel high-side switch while OUTB drives an N-channel low-side switch in a synchronous buck stage. The truth table in Section 7.4 of the datasheet confirms this behavior under all ENBA/ENBB and input combinations.

Can UCC27425P drive both N-channel and P-channel MOSFETs simultaneously?

Yes - UCC27425P is explicitly designed for this use case. OUTB (non-inverting) directly drives N-channel MOSFET gates referenced to ground, while OUTA (inverting) drives P-channel MOSFET gates referenced to the high-side rail. The ±4-A peak current and low output impedance ensure strong Miller plateau control for both device types, as confirmed in Section 7.3.3 of the UCC27425P datasheet.

What is the maximum continuous output current rating for UCC27425P?

UCC27425P specifies a pulsed output current of ±4.5 A (0.5 µs pulse width) and a DC output current limit of 0.2 A per channel. Continuous operation relies on thermal management: at TA = 70°C, the PDIP package supports ~500 mW dissipation before derating. Real-world continuous gate drive current depends on duty cycle, load capacitance, and PCB copper area - typical designs sustain 1–2 A RMS with proper layout.

Does UCC27425P require external pull-up resistors on ENBA and ENBB?

No - UCC27425P integrates 100-kΩ internal pull-up resistors on both ENBA and ENBB, connecting to VDD. These enable active-high operation with floating enables for standard functionality. External pull-ups are unnecessary and may interfere with fast disable timing; however, in noisy environments, a 0.1-µF capacitor from ENBA/ENBB to GND is recommended per Section 7.3.1 of the datasheet.

How does UCC27425P minimize shoot-through current in bridge configurations?

UCC27425P minimizes shoot-through risk through inherent architecture: its bipolar-MOSFET hybrid output stage avoids cross-conduction during switching transitions, and the dedicated ENBA/ENBB pins allow precise per-channel enable/disable sequencing. Unlike open-drain drivers, UCC27425P actively pulls outputs low during disable - eliminating floating states that could cause unintended conduction in half-bridge legs.