Texas Instruments UCC27525D

Overview

UCC27525D from Texas Instruments is a dual-channel, low-side gate driver IC with one inverting and one non-inverting input configuration, delivering 5A peak source/sink current per channel, 13ns typical propagation delay, and rail-to-rail output drive - used to control MOSFETs/IGBTs in high-frequency power stages of DC-DC converters and GaN-based power supplies.

For engineers reviewing the UCC27525D datasheet, UCC27525D pinout, UCC27525D application, or UCC27525D equivalent, key selection criteria include independent enable control per channel, TTL/CMOS-compatible logic thresholds independent of VDD, 4.5–18V supply range, –40°C to 140°C operation, and SOIC-8 package compatibility with industry-standard layout footprints.

Technical Context

The UCC27525D implements two independent low-side driver channels with separate ENA/ENB enable inputs and distinct input polarities: INA is inverting, INB is non-inverting. Its internal UVLO circuit holds both outputs low until VDD exceeds 4.2V (typ), ensuring glitch-free startup and shutdown.

Input thresholds are fixed at ~2.1V (high) and ~1.2V (low) with 0.9V hysteresis, decoupled from VDD voltage - enabling direct interfacing with 3.3V or 5V controllers. Propagation delays are tightly matched (1ns typ), supporting synchronous rectifier timing and parallel-output configurations for increased drive strength.

Key Specifications

Pinout & Package

UCC27525D is packaged in an 8-pin SOIC (D) body measuring 4.90mm × 3.91mm with standard lead pitch and exposed thermal pad option not present in this variant. Pin functions are validated per TI SLUSAQ3H datasheet Section 5.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27524D and LM5113SD, the UCC27525D uniquely combines mixed-polarity inputs (INA inverting, INB non-inverting) with independent enable pins in a single SOIC-8 package - enabling compact, flexible, and timing-critical dual-switch control without external logic or duplication.

Availability

UCC27525D is available at Aetrix Electronics and suitable for switched-mode power supplies, DC-DC converters, and motor control systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for UCC27525D 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 and manufacturing analog, embedded processing, and power management ICs for industrial, automotive, and communications markets.

The UCC2752x family was developed specifically for high-efficiency, high-frequency power conversion systems - targeting GaN/SiC gate drive, synchronous rectification, and isolated DC-DC modules where timing precision, drive strength, and robustness are critical.

FAQ

What is the input logic configuration of the UCC27525D?

The UCC27525D features one inverting input (INA) and one non-inverting input (INB), with independent enable pins (ENA and ENB) for each channel. This configuration allows asymmetric control - for example, using INA to invert a PWM signal for high-side referenced low-side switches while driving INB directly for standard low-side FETs. The UCC27525D datasheet confirms this topology in Figure 5-1 and Table 5-1.

Does the UCC27525D support 3.3V logic inputs?

Yes, the UCC27525D supports 3.3V logic inputs directly: its input thresholds are fixed at ~2.1V (high) and ~1.2V (low), independent of VDD voltage, with 0.9V hysteresis for noise immunity. This allows reliable interfacing with 3.3V microcontrollers or digital PWM controllers without level shifters - a key feature confirmed in Section 7.3.3 of the UCC27525D datasheet.

What happens to the outputs of the UCC27525D when the inputs are left floating?

When INA or INB are left floating, the UCC27525D internally pulls INA high (via VDD) and INB low (via GND), forcing OUTA and OUTB into a defined low state. This fail-safe behavior prevents unintended power switch turn-on during signal loss or initialization - explicitly documented in Section 4 and Table 5-1 of the UCC27525D datasheet.

Can the two outputs of the UCC27525D be paralleled for higher current drive?

Yes, the UCC27525D supports paralleling OUTA and OUTB to deliver up to 10A peak drive current, enabled by its 1ns typical inter-channel delay matching and rail-to-rail output capability. This configuration is recommended in the UCC27525D datasheet Section 4 for driving high-gate-charge GaN FETs or paralleled MOSFETs in high-power density applications.

What is the thermal performance of the UCC27525D in SOIC-8 package?

The UCC27525D in SOIC-8 (D) package has a junction-to-ambient thermal resistance (R_θJA) of 130.9°C/W, as specified in Section 6.4 of the UCC27525D datasheet. With proper PCB copper area (≥1 in² 2-oz copper) and thermal vias, it sustains continuous 5A pulsed operation at 140°C junction temperature - validated across –40°C to 140°C ambient per Recommended Operating Conditions.