Texas Instruments UCC27523DR

Overview

UCC27523DR from Texas Instruments is a dual-channel, low-side gate driver IC designed for high-frequency switching power stages. It delivers 5A peak source/sink current per channel, features 13ns typical propagation delay and 1ns typical inter-channel delay matching, and operates across 4.5V–18V VDD with –40°C to 140°C junction temperature range - enabling robust drive of Si MOSFETs and GaN power switches in synchronous rectifier circuits.

For engineers reviewing the UCC27523DR datasheet, UCC27523DR pinout, UCC27523DR application, or UCC27523DR equivalent, key selection considerations include independent enable control per channel, TTL/CMOS-compatible logic thresholds independent of VDD, UVLO-protected glitch-free startup, and SOIC-8 package compatibility with industrial and high-efficiency DC-DC converter designs.

Technical Context

The UCC27523DR implements two independent low-side driver channels with inverting input logic for both outputs, each featuring internal pull-up resistors on INA and INB and dedicated enable pins (ENA/ENB) that default to active-high operation when floating. Its architecture inherently minimizes shoot-through current and holds outputs low during VDD undervoltage lockout or input floating conditions.

Propagation delays are tightly matched (1ns typical) and stable across temperature and supply voltage, supporting precise timing-critical applications like synchronous rectification and paralleled switch configurations. Input thresholds (1.2V low / 2.1V high) and enable thresholds (1.15V low / 2.1V high) maintain hysteresis (0.9V typical) for noise immunity without dependency on VDD level.

Key Specifications

Pinout & Package

UCC27523DR is packaged in an 8-pin SOIC (D) body measuring 4.90mm × 3.91mm with standard industry footprint and thermal pad omitted (non-PowerPAD variant). Pin 1 is ENA, pin 2 is INA (inverting), pin 3 is GND, pin 4 is INB (inverting), pin 5 is OUTB, pin 6 is VDD, pin 7 is OUTA, and pin 8 is ENB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27524DR, UCC27523DR provides native inverting logic for direct use with standard PWM controllers; compared with LM5113SD/NOPB, it offers true dual-channel integration with per-channel enable - reducing component count and improving timing consistency in multi-FET systems.

Availability

UCC27523DR is available at Aetrix Electronics and suitable for switched-mode power supplies, motor control inverters, and GaN-based DC-DC converters requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for UCC27523DR 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 delivering analog, embedded processing, and connectivity solutions with over 90 years of innovation in power management and signal chain technologies.

The UCC2752x product line was engineered specifically for high-efficiency, high-frequency power conversion systems - emphasizing timing precision, noise immunity, and robust gate drive capability for Si, SiC, and GaN power devices.

FAQ

What is the logic configuration of the UCC27523DR inputs?

The UCC27523DR features dual inverting inputs: INA controls OUTA and INB controls OUTB, both with active-high logic that produces low output when the input is high. This matches standard PWM controller output polarity for synchronous rectifiers and half-bridge low-side drivers without external inversion. The UCC27523DR datasheet confirms this configuration in Figure 5-1 and Table 5-1.

Does the UCC27523DR support parallel operation of its two channels?

Yes, the UCC27523DR supports parallel operation: its matched 1ns typical delay and identical output structure allow OUTA and OUTB to be tied together for 10A total peak drive current. This is explicitly supported in the UCC27523DR datasheet Section 3 and validated by rail-to-rail drive capability and minimized shoot-through design.

What happens to UCC27523DR outputs when input pins are left unconnected?

When INA or INB are floating, internal VDD pull-up resistors force the respective output (OUTA or OUTB) low - a built-in safety feature confirmed in UCC27523DR datasheet Section 4 and Table 5-1. This prevents unintended switch turn-on during startup, fault, or debug conditions and aids compliance with safety standards.

Is the UCC27523DR pin-compatible with earlier TI gate drivers?

Yes, the UCC27523DR maintains pin compatibility with the UCC2732X family: ENA and ENB pins are internally pulled up, allowing them to float for standard operation - matching the NC pins of UCC2732X. This is documented in UCC27523DR datasheet Table 5-1 and Section 4, enabling drop-in replacement in legacy designs.

What is the minimum VDD voltage required for reliable operation of the UCC27523DR?

The UCC27523DR requires VDD ≥ 4.5V for normal operation, with undervoltage lockout releasing at 4.2V (typical) and re-engaging at 3.9V (typical). Below 4.5V, outputs remain low and internal logic is disabled - ensuring glitch-free behavior during brownout. This is specified in UCC27523DR Section 6.3 and Figure 6-8.