Texas Instruments TL751M05QKVURQ1

Overview

TL751M05QKVURQ1 from Texas Instruments is an automotive-grade 5-V low-dropout linear voltage regulator in TO-252-5 (KVU) package, featuring enable control, <0.65 V dropout at 750 mA, ±2% output voltage accuracy over –40°C to 125°C, and integrated load-dump protection up to 60 V - designed for permanent-battery-connected vehicle subsystems such as body control modules and infotainment power rails.

For engineers reviewing the TL751M05QKVURQ1 datasheet, TL751M05QKVURQ1 pinout, TL751M05QKVURQ1 application, or TL751M05QKVURQ1 equivalent, key selection criteria include its AEC-Q100 qualification, TTL/CMOS-compatible ENABLE input with 50 µs startup response, thermal shutdown, reverse-battery tolerance, and compatibility with 10-µF tantalum output capacitors.

Technical Context

The TL751M05QKVURQ1 implements a PNP pass transistor architecture with internal bandgap reference, current-limiting, overvoltage protection, and thermal overload circuitry. Its ENABLE input directly controls the output stage, placing the regulator in high-impedance shutdown mode when logic-low (≤0.8 V), drawing only 200 µA quiescent current.

It operates across 6 V to 26 V input range with guaranteed 750 mA output current, maintains 5 V ±2% regulation under line/load transients, and sustains stability with output capacitor ESR between 0.13 Ω and 2 Ω - validated for automotive environments including load-dump (60 V transient) and reverse-battery (–50 V, 100 ms) stress conditions.

Key Specifications

Pinout & Package

TL751M05QKVURQ1 uses the TO-252-5 (KVU) surface-mount package with exposed thermal pad. The package features 5 leads in a single-row configuration, with Pin 1 (INPUT) and Pin 5 (COMMON) electrically connected to the exposed pad for optimal thermal performance and ground integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO regulator applications.

Compared with TL751M05QKTTRQ1, the TL751M05QKVURQ1 offers identical regulation performance in a smaller, lower-cost TO-252 package with adequate thermal capability for most under-dash applications; versus TPS7B6750QDDARQ1, it trades off quiescent current for built-in load-dump robustness - eliminating design risk in uncontrolled battery environments.

Availability

TL751M05QKVURQ1 is available at Aetrix Electronics and suitable for automotive body electronics, infotainment subsystems, and telematics modules requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for TL751M05QKVURQ1 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 automotive-grade power management solutions.

The TL751Mxx-Q1 series was developed specifically for automotive power rails requiring high reliability, integrated fault protection, and seamless integration into battery-permanently-connected systems.

FAQ

What is the maximum input voltage the TL751M05QKVURQ1 can withstand during load-dump events?

The TL751M05QKVURQ1 is rated for transient input voltages up to 60 V per ISO 7637-2 Pulse 5a, with no external components required. This specification is verified across the full operating temperature range and forms part of its AEC-Q100 qualification. The device automatically clamps and recovers without latch-up or degradation, making TL751M05QKVURQ1 suitable for direct connection to vehicle battery lines in engine compartments and other high-stress locations.

Does the TL751M05QKVURQ1 require an external capacitor on the ENABLE pin?

No, the TL751M05QKVURQ1 does not require an external capacitor on the ENABLE pin. Its ENABLE input is internally buffered and compatible with standard CMOS/TTL logic drive levels (VIH ≥2 V, VIL ≤0.8 V). The 50 µs typical startup time is achieved without external timing components, and the pin exhibits negligible input capacitance - simplifying layout and eliminating risk of false triggering from noise or slow edges.

Can the TL751M05QKVURQ1 operate with ceramic output capacitors?

The TL751M05QKVURQ1 is characterized and stabilized for use with 10-µF tantalum capacitors having ESR between 0.13 Ω and 2 Ω. While some ceramic capacitors may work in specific layouts, TI does not guarantee stability with low-ESR ceramics due to potential phase-margin reduction. For ceramic-based designs, additional series resistance (per Table 1 in the datasheet) or alternative regulators like TPS7B6950QDBVRQ1 are recommended - TL751M05QKVURQ1's validation is strictly for tantalum or polymer types meeting ESR specifications.

What is the thermal resistance (θJA) of the TL751M05QKVURQ1 in its TO-252-5 package?

The TL751M05QKVURQ1 in the TO-252-5 (KVU) package has a junction-to-ambient thermal resistance (θJA) of 38.6°C/W under JEDEC-standard high-K board conditions. This value assumes proper soldering of the exposed thermal pad to ≥1 in² of 2-oz copper with ≥6 thermal vias. Real-world θJA will vary with PCB layout; derating is required above 125°C ambient to maintain TJ ≤150°C absolute maximum.

Is the NC pin on the TL751M05QKVURQ1 required to be grounded or left floating?

The NC (No Connection) pin on the TL751M05QKVURQ1 is not internally bonded and carries no electrical function. It may be left floating or connected to COMMON (Pin 4) for mechanical reinforcement and improved thermal conduction - TI confirms neither choice affects regulation performance, stability, or reliability. No current flows through this pin under any operating condition, and TL751M05QKVURQ1 functionality remains unchanged regardless of NC pin treatment.