Texas Instruments TL750L05CKCSE3

Overview

TL750L05CKCSE3 from Texas Instruments is a 5-V fixed-output, low-dropout linear voltage regulator in TO-220 (KCS) package with 3-pin configuration. It delivers up to 150 mA output current with dropout voltage ≤0.6 V at full load, reverse transient protection down to –50 V, and integrated thermal/overcurrent protection. It is designed for battery-powered systems requiring stable 5-V supply under harsh automotive or industrial conditions.

For engineers reviewing the TL750L05CKCSE3 datasheet, TL750L05CKCSE3 pinout, TL750L05CKCSE3 application, or TL750L05CKCSE3 equivalent, key selection criteria include dropout performance at 150 mA, 60-V load-dump immunity, quiescent current ≤2 mA across 0°C–125°C, and TO-220 thermal resistance (θ_JA = 19°C/W).

Technical Context

The TL750L05CKCSE3 implements a PNP pass transistor architecture enabling ultra-low dropout operation without external compensation. Its internal circuitry integrates reverse-battery protection, overvoltage clamping, and thermal shutdown-enabling direct use in 12-V automotive battery systems without external diodes or fuses.

Unlike the TL751L series, TL750L05CKCSE3 lacks an ENABLE input and operates continuously when input voltage is applied within 6 V–26 V. Its stability relies on a minimum 10-μF tantalum output capacitor with ESR between 0.024 Ω and 0.9 Ω across –40°C to 125°C.

Key Specifications

Pinout & Package

TL750L05CKCSE3 uses a TO-220 (KCS) 3-pin package with exposed metal tab for thermal conduction. Pin 1 is COMMON (GND), Pin 2 is OUTPUT, Pin 3 is INPUT. The tab is electrically connected to COMMON and must be thermally anchored to PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL750L05CKC and LM2931AZ-5.0/NOPB, TL750L05CKCSE3 uniquely combines 0.6-V dropout, 60-V load-dump immunity, and –50-V reverse transient tolerance in a single TO-220 device-reducing system-level protection components and validation effort for automotive and industrial designs.

Availability

TL750L05CKCSE3 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power supplies, portable medical monitors, and smart energy meters requiring stable component supply with guaranteed long-term availability.

Supply support for TL750L05CKCSE3 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, specializing in analog and embedded processing technologies with over 90 years of innovation in power management ICs.

The TL750L series was engineered specifically for battery-powered automotive and industrial systems requiring robust transient immunity, low dropout, and high reliability across –40°C to 125°C-addressing design challenges in engine control units, telematics, and factory automation.

FAQ

What is the maximum input voltage rating for TL750L05CKCSE3?

The TL750L05CKCSE3 has a continuous input voltage rating of 26 V and a transient input voltage rating of 60 V for ≤100 ms per ISO 7637-2 Pulse 5a. This allows direct connection to 12-V automotive batteries without external clamping components. Exceeding 60 V-even briefly-may cause permanent damage to the TL750L05CKCSE3.

Does TL750L05CKCSE3 require an external enable circuit?

No, TL750L05CKCSE3 does not have an ENABLE pin and operates continuously when input voltage is applied within its 6 V–26 V range. Unlike the TL751L series, it lacks TTL/CMOS-compatible enable functionality. To implement controlled power-up, an external MOSFET switch must be placed on the input or output side of the TL750L05CKCSE3.

What output capacitor is required for stable operation of TL750L05CKCSE3?

TL750L05CKCSE3 requires a minimum 10-μF tantalum capacitor on the output with ESR between 0.024 Ω and 0.9 Ω for stability across –40°C to 125°C. Ceramic capacitors alone are insufficient due to their near-zero ESR; a parallel RC network or polymer capacitor may be used if tantalum is unavailable. The TL750L05CKCSE3 will oscillate without proper ESR compliance.

Can TL750L05CKCSE3 replace a standard 78L05 regulator in existing designs?

TL750L05CKCSE3 can replace 78L05 in many applications but requires layout verification: its TO-220 KCS package has different pinout (COMMON–OUTPUT–INPUT vs INPUT–GND–OUTPUT) and superior thermal performance (θ_JA = 19°C/W vs ~100°C/W). Also, TL750L05CKCSE3 provides 60-V load-dump immunity and –50-V reverse protection-features absent in 78L05-so external protection components may be removed.

What is the thermal performance of TL750L05CKCSE3 in a typical PCB layout?

In a standard 4-layer PCB with 2 cm² copper pour connected to the TO-220 tab, TL750L05CKCSE3 achieves θ_JA = 19°C/W. At 150 mA output and 12 V input, power dissipation is 1.05 W, resulting in ~20°C junction-to-ambient rise above board temperature. This allows full-load operation at 105°C ambient without thermal shutdown-exceeding the 125°C max TJ rating only under extreme conditions.