Texas Instruments TL750L05CKTTRG3

Overview

TL750L05CKTTRG3 from Texas Instruments is a 5-V, 150-mA low-dropout linear voltage regulator in TO-263 (KTT) package, designed for battery-powered systems requiring stable output under low input-output differential. It delivers ≤0.6 V dropout at full load, supports 6–26 V input range, and integrates reverse-battery protection down to –50 V, overcurrent limiting, and thermal shutdown - used in automotive body control modules and industrial sensor nodes.

For engineers reviewing the TL750L05CKTTRG3 datasheet, TL750L05CKTTRG3 pinout, TL750L05CKTTRG3 application, or TL750L05CKTTRG3 equivalent, key selection criteria include dropout voltage at 150 mA, load-dump immunity up to 60 V, quiescent current under 2 mA across temperature, and thermal performance in high-power-density PCB layouts.

Technical Context

The TL750L05CKTTRG3 implements a PNP-based pass transistor architecture with internal bandgap reference and error amplifier, enabling stable regulation without external compensation when paired with ≥10-μF output capacitance (ESR < 0.4 Ω). Its fixed 5-V output is trimmed at 25°C to ±2% and maintains ±5% over 0°C to 125°C junction temperature.

Unlike the TL751L series, TL750L05CKTTRG3 lacks an ENABLE pin and operates continuously when input voltage is applied. Protection features are fully integrated: reverse-transient clamping, 60-V load-dump tolerance, and thermal foldback activation above 150°C virtual junction temperature.

Key Specifications

Pinout & Package

TL750L05CKTTRG3 uses the TO-263 (KTT) surface-mount package with 3 terminals and an exposed thermal pad. The package measures 10.8 mm × 16.3 mm × 5.11 mm (L × W × H), rated MSL-3 (245°C peak reflow, 168-hour floor life).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout voltage regulator applications.

Compared with TL750L05CKCS and TL750L05CDR, TL750L05CKTTRG3 offers superior thermal performance (25.3°C/W vs. 19°C/W and 97°C/W) and highest power density in SMT form, making it optimal for thermally constrained automotive and industrial modules where reliability under sustained load is critical.

Availability

TL750L05CKTTRG3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and medical portable devices requiring stable component supply with long lifecycle assurance and AEC-Q100-aligned reliability data.

Supply support for TL750L05CKTTRG3 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 and embedded processing technologies, with decades of experience in automotive-grade power management ICs.

The TL750L series was engineered specifically for battery-powered and automotive systems demanding robustness against reverse polarity, load dump, and thermal stress - targeting applications where failure modes must be mitigated at the silicon level.

FAQ

What is the maximum input voltage rating for TL750L05CKTTRG3?

The TL750L05CKTTRG3 has a continuous input voltage rating of 26 V and a transient input voltage rating of 60 V per ISO 7637-2 Pulse 5a. This allows direct connection to 12-V automotive battery rails while surviving load-dump events without external clamping components. The 60-V rating applies to waveforms with t ≤ 400 ms and is validated per TI's production test flow.

Does TL750L05CKTTRG3 include an enable pin?

No, TL750L05CKTTRG3 does not include an ENABLE pin. It belongs to the TL750L series, which is always-on when input voltage is within specification. In contrast, the TL751L series (e.g., TL751L05CDR) adds TTL/CMOS-compatible ENABLE functionality. TL750L05CKTTRG3 enters shutdown only during thermal foldback or overcurrent limiting - not via external control.

What output capacitor is required for stable operation of TL750L05CKTTRG3?

TL750L05CKTTRG3 requires a minimum 10-μF tantalum or polymer capacitor on the output with ESR ≤ 0.4 Ω for stability across temperature and load. A 0.1-μF ceramic capacitor is also required on the input. Using capacitors outside this range - especially low-ESR ceramics alone - risks oscillation, as confirmed in Figure 1 of the SLVS017U datasheet.

How does TL750L05CKTTRG3 handle reverse battery conditions?

TL750L05CKTTRG3 incorporates internal reverse-battery protection that withstands –15 V continuously and –50 V transients for up to 100 ms. This eliminates the need for an external series Schottky diode in automotive applications, reducing forward voltage drop, heat generation, and BOM cost. The protection is implemented via integrated JFET and diode structures as documented in the device component count table.

What is the thermal performance of TL750L05CKTTRG3 in standard PCB layout?

In a standard 2-layer PCB with 1-in² copper pour connected to the exposed thermal pad, TL750L05CKTTRG3 achieves θ_JA = 25.3°C/W. At 70°C ambient and 150 mA output into 5 V, power dissipation is ~0.9 W, resulting in ~93°C junction temperature - well below the 150°C absolute maximum. Performance improves with additional thermal vias and inner-layer copper planes.