Texas Instruments TL780-05CKTER

Overview

TL780-05CKTER from Texas Instruments is a fixed-output +5 V, 1.5 A positive-voltage linear regulator in PowerFLEX™ (KTE) package with ±1% output tolerance at 25°C, thermal shutdown, and internal short-circuit current limiting-designed for stable DC power delivery in industrial control and embedded power supplies.

For engineers reviewing the TL780-05CKTER datasheet, TL780-05CKTER pinout, TL780-05CKTER application, or TL780-05CKTER equivalent, key selection criteria include dropout voltage (2 V @ 1 A), ripple rejection (70–85 dB), output noise (75 µV), thermal resistance (θ_JA = 23.3°C/W), and compatibility with standard µA7800-series PCB layouts.

Technical Context

The TL780-05CKTER uses an internally trimmed band-gap reference and temperature-compensation technique to achieve ±1% initial accuracy and ±2% tolerance over 0°C to 125°C. Its three-terminal architecture integrates current limiting and thermal shutdown without external components.

It operates with input voltages from 7 V to 25 V, delivers up to 1.5 A continuous load current, and maintains regulation under line (±0.5 mV), load (4–25 mV), and thermal (0.25 mV/°C) variations-enabling robust performance in unregulated DC bus environments.

Key Specifications

Pinout & Package

TL780-05CKTER is housed in the PowerFLEX™ (KTE) package - a surface-mount variant of TO-263 with exposed thermal pad for enhanced heat dissipation. The 3-pin configuration supports standard three-terminal regulator layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar positive-voltage linear regulator applications.

Compared with LM7805CDT/NOPB, TL780-05CKTER delivers tighter tolerance and superior thermal performance in surface-mount form; versus TLV76750DRVR, it trades ultra-low noise and dropout for higher current and integrated protection-making it optimal for industrial 5 V rail consolidation.

Availability

TL780-05CKTER is available at Aetrix Electronics and suitable for industrial automation, embedded control, and test equipment requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TL780-05CKTER 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, embedded processing, and power management ICs with broad industrial and automotive qualification.

The TL780 series belongs to TI's legacy linear regulator product line, engineered for reliability and compatibility in industrial power systems where pin-for-pin upgrade paths and proven thermal behavior are critical design constraints.

FAQ

What is the maximum input voltage rating for TL780-05CKTER?

The absolute maximum input voltage for TL780-05CKTER is 35 V, but the recommended operating range is 7 V to 25 V per the datasheet. Exceeding 25 V risks exceeding safe power dissipation limits-especially at high ambient temperatures-and may trigger thermal shutdown prematurely. Always verify power dissipation (P_D = (V_IN − 5 V) × I_OUT) against the KTE package's θ_JA = 23.3°C/W to ensure TJ remains ≤125°C.

Does TL780-05CKTER require external capacitors, and what values are specified?

Yes, TL780-05CKTER requires both input and output capacitors for stability and performance. The datasheet specifies a minimum 0.33 µF ceramic or tantalum capacitor on the input and a minimum 0.22 µF capacitor on the output. These values are validated for all electrical characteristics-including ripple rejection and transient response-and omitting them may cause oscillation or degraded regulation. TL780-05CKTER does not include internal compensation, so adherence to these external capacitor requirements is mandatory.

Is TL780-05CKTER pin-compatible with standard 7805 regulators?

Yes, TL780-05CKTER has identical pinout to the µA7800 series-including classic 7805 variants-in its KTE (PowerFLEX™) package. Pin 1 is INPUT, Pin 2 is GROUND (connected to thermal pad), and Pin 3 is OUTPUT. This allows direct PCB substitution where the KTE footprint is implemented. However, mechanical mounting differs from TO-220: the KTE package is surface-mount with thermal pad soldering, so through-hole 7805 footprints are not compatible without adapter design.

What protection features are integrated into TL780-05CKTER?

TL780-05CKTER integrates two primary protection mechanisms: internal short-circuit current limiting (clamping output to ~750 mA at 25°C) and thermal shutdown (activating at ~150°C virtual junction temperature). It does not include reverse-polarity or overvoltage input protection-external diodes are recommended if the input can float or reverse-bias relative to ground. These protections make TL780-05CKTER robust for industrial environments but do not eliminate need for proper input filtering and heatsinking.

How does TL780-05CKTER compare to TL780-05CKC in terms of thermal performance?

TL780-05CKTER (KTE package) offers significantly better thermal performance than TL780-05CKC (TO-220 KC package): θ_JA is 23.3°C/W vs. 19°C/W, and θ_JC is 11.6°C/W vs. 17°C/W. While the TO-220 version has lower θ_JA, its performance depends heavily on external heatsink attachment; the KTE's exposed pad provides more consistent board-level conduction. In typical 4-layer PCB layouts with 2 oz copper and thermal vias, TL780-05CKTER achieves ~20% higher continuous current capability at 60°C ambient-making it preferable for compact, heatsink-free designs.