TL780-05CKTTRG3 Equivalent & Substitute Parts

Part Overview

The TL780-05CKTTRG3 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 5V output at 1.5A maximum current in a TO-263 (DDPAK-3) surface mount package. The device features integrated protection against overcurrent, overtemperature, reverse polarity, and short circuit conditions, with a maximum input voltage of 25V and dropout voltage of 2V at 1A.

The TL780-05CKTTRG3 carries an Obsolete product status. Locating equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	1.5A
Input Voltage (Max)	25V
Dropout Voltage (Max)	2V @ 1A
Output Configuration	Positive Fixed
Package Type	TO-263 (DDPAK-3)
Mounting Type	Surface Mount
Operating Temperature Range	0°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TL780-05CKTTRG3 is determined by strict alignment of the following electrical and mechanical parameters:

Fixed output voltage of 5V
Output current capability of 1.5A minimum
Maximum input voltage of 25V or greater
Dropout voltage of 2V or less at 1A
Positive fixed output configuration
TO-263 (DDPAK-3) package compatibility
Surface mount mounting type
Operating temperature range of 0°C to 125°C
RoHS3 compliance

The substitute parts identified below meet all these criteria and are therefore electrically and mechanically interchangeable with the TL780-05CKTTRG3 in applications where these parameters define the design requirements.

Parameter Comparison

Parameter	TL780-05CKTTRG3	UA7805CKTTR	LM340S-5.0/NOPB	LM340SX-5.0/NOPB	TL780-05CKTTR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	5V	5V	5V	5V	5V
Output Current	1.5A	1.5A	1.5A	1.5A	1.5A
Input Voltage (Max)	25V	25V	35V	35V	25V
Dropout Voltage (Max)	2V @ 1A	2V @ 1A	2V @ 1A	2V @ 1A	2V @ 1A
Package Type	TO-263 (DDPAK-3)	TO-263 (DDPAK-3)	TO-263 (DDPAK-3)	TO-263 (DDPAK-3)	TO-263 (DDPAK-3)
Operating Temperature	0°C to 125°C	0°C to 125°C	0°C to 125°C	0°C to 125°C	0°C to 125°C
Product Status	Obsolete	Last Time Buy	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the TL780-05CKTTRG3, the following selection criteria apply based on product status and compliance:

Primary Recommendation: LM340S-5.0/NOPB or LM340SX-5.0/NOPB. Both parts carry Active product status, ensuring long-term availability and supply chain stability. These parts provide identical electrical performance with higher maximum input voltage ratings (35V versus 25V), offering additional design margin. Both are ROHS3 compliant with equivalent moisture sensitivity levels.

Secondary Recommendation: UA7805CKTTR. This part maintains Last Time Buy status, indicating limited future availability. It is electrically equivalent to the TL780-05CKTTRG3 with identical input voltage and protection feature specifications. Use this option only when inventory constraints or design-specific requirements necessitate it.

Tertiary Option: TL780-05CKTTR. This part shares the same base product number as the main part and carries Obsolete status. It is electrically and mechanically equivalent but offers no supply chain advantage over the primary recommendations.

Frequently Asked Questions (FAQ)

Q: Can LM340S-5.0/NOPB or LM340SX-5.0/NOPB be used as direct replacements for TL780-05CKTTRG3?

A: Yes. Both parts meet all electrical and mechanical substitution criteria: identical 5V fixed output, 1.5A current capability, 2V dropout voltage at 1A, TO-263 (DDPAK-3) package, and 0°C to 125°C operating range. The higher maximum input voltage (35V) of these parts provides additional design margin without affecting compatibility.

Q: What is the difference between UA7805CKTTR and the LM340 series?

A: UA7805CKTTR and LM340S-5.0/NOPB are electrically equivalent for the specified parameters. The primary difference is product status: UA7805CKTTR is Last Time Buy, while LM340S-5.0/NOPB is Active. For new designs or long-term production, LM340S-5.0/NOPB is preferred due to ongoing availability.

Q: Are there packaging differences between these substitute parts?

A: All substitute parts use the TO-263 (DDPAK-3) surface mount package. Packaging format differs: LM340S-5.0/NOPB is supplied in Tube, UA7805CKTTR and LM340SX-5.0/NOPB are supplied in Cut Tape & Digi-Reel. These differences do not affect electrical or mechanical compatibility; they reflect supplier distribution methods.

Q: Why does LM340S-5.0/NOPB have a higher maximum input voltage than TL780-05CKTTRG3?

A: The LM340 series is rated for 35V maximum input versus 25V for the TL780 series. This difference reflects the device design and testing specifications. Both parts operate identically within the 25V input range, making them fully compatible for applications designed around the TL780-05CKTTRG3 specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification with identical moisture sensitivity levels (MSL 3, 168 Hours), ensuring regulatory and environmental compatibility with the original TL780-05CKTTRG3.

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