Texas Instruments UCC37325P

Overview

UCC37325P from Texas Instruments is a dual low-side MOSFET driver with one inverting (OUTA) and one noninverting (OUTB) output channel, delivering ±4-A peak gate drive current at the Miller plateau region, operating from 4.5 V to 15 V supply, and featuring TTL/CMOS-compatible inputs independent of VDD - used in high-frequency DC-DC converters and solar inverter half-bridge gate drive stages.

For engineers reviewing the UCC37325P datasheet, UCC37325P pinout, UCC37325P application, or UCC37325P equivalent, this page delivers verified package mapping (PDIP-8), confirmed switching specs (20 ns rise / 15 ns fall @ 1.8 nF), thermal resistance (R_θJA = 55.5°C/W), input hysteresis for noise immunity, and validated alternative part selection guidance.

Technical Context

The UCC37325P implements a Bi-CMOS hybrid output stage combining bipolar and MOSFET transistors in parallel to sustain ±4-A peak current even at low VDD (4.5 V), enabling robust Miller plateau drive without droop. Its input stage features fixed TTL/CMOS thresholds (V_{IN_H} = 1.6–2.5 V, V_{IN_L} = 0.8–1.5 V) with wide hysteresis and 500-mA reverse-current tolerance.

Functionally, it operates as a dual-channel gate driver with asymmetric logic: OUTA inverts INA, while OUTB follows INB - supporting synchronous rectification and complementary half-bridge control. It requires no external bootstrap components and avoids shoot-through via inherent design, with all inputs requiring tie-high or tie-low termination (no floating).

Key Specifications

Pinout & Package

UCC37325P is housed in an 8-pin PDIP (Plastic Dual In-line Package) measuring 9.27 mm × 6.35 mm, with through-hole mounting and internal ground plane connected to Pin 3 (GND). The PowerPAD™ thermal enhancement present in MSOP variants is absent in this PDIP version.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27325D, UCC37325P trades thermal performance and temperature range for through-hole assembly flexibility and legacy compatibility; versus TC4427ACPA, it delivers 2.7× higher peak current and 40% faster switching - making it essential for high-efficiency, high-frequency power conversion where gate drive strength directly impacts system efficiency.

Availability

UCC37325P is available at Aetrix Electronics and suitable for switch-mode power supplies, DC-DC converters, and solar inverter designs requiring stable component supply, long-term obsolescence mitigation, and consistent through-hole manufacturing support.

Supply support for UCC37325P 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 over 50 years of innovation in high-reliability power ICs.

The UCC37325P belongs to TI's UCCx732x dual MOSFET driver product line, engineered specifically for high-current, high-speed gate driving in commercial-temperature power conversion systems - emphasizing Miller plateau current delivery, noise-immune inputs, and layout-friendly pinout.

FAQ

What is the maximum operating junction temperature for UCC37325P?

The UCC37325P is rated for a junction temperature range of 0°C to +70°C, as specified in its Recommended Operating Conditions table. This distinguishes it from the industrial-grade UCC27325 variant (–40°C to +125°C). Exceeding +70°C risks parametric shift and accelerated wear-out; thermal design must ensure R_θJA × P_D + T_A ≤ 70°C under worst-case load.

Can UCC37325P drive both N-channel and P-channel MOSFETs simultaneously?

Yes - UCC37325P's asymmetric logic configuration (inverting OUTA, noninverting OUTB) enables direct drive of complementary pairs: OUTA controls a P-channel high-side switch (when referenced to its source), while OUTB drives an N-channel low-side switch. This supports active-clamp, synchronous buck, or half-bridge topologies without external inverters.

Is UCC37325P pin-compatible with UCC27325P?

No - while both share the PDIP-8 package and identical pin numbering, UCC27325P is not a valid TI part number. The correct industrial counterpart is UCC27325D (SOIC-8) or UCC27325P (PDIP-8), which *is* pin-compatible with UCC37325P electrically and physically. Always verify ordering codes against TI's official datasheet SLUS492K.

Does UCC37325P require external pull-up or pull-down resistors on INA and INB?

UCC37325P does not require external pull-up/pull-down resistors for normal operation - its inputs have defined TTL/CMOS thresholds and hysteresis. However, if either INA or INB is unused, it *must* be tied to VDD or GND with a direct connection (not via resistor) to prevent floating, which could cause erratic output behavior or increased supply current.

What is the purpose of the two N/C pins (Pins 1 and 8) on UCC37325P?

Pins 1 and 8 on UCC37325P are No Internal Connection terminals - they are electrically isolated from all internal circuitry and silicon die. These pins serve mechanical stability in the PDIP package and must remain unconnected on the PCB. Routing traces or applying solder to them may introduce parasitic capacitance or contamination risk without functional benefit.