LMS1585ACT-1.5 Equivalent & Substitute Parts

Part Overview

The LMS1585ACT-1.5 is a linear voltage regulator IC from Texas Instruments, designed for positive fixed 1.5V output applications requiring 5A current capacity in a TO-220-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device provides over-current and over-temperature protection suitable for power management applications in the 0°C to 125°C operating range.

Key Parameters

Parameter	Value
Manufacturer Part Number	LMS1585ACT-1.5
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Package / Case	TO-220-3
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	1.5V
Voltage - Input (Max)	13V
Current - Output	5A
Voltage Dropout (Max)	1.4V @ 5A
Operating Temperature	0°C ~ 125°C
Protection Features	Over Current, Over Temperature
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the LMS1585ACT-1.5 are qualified based on the following critical parameters that determine functional equivalence:

Output voltage: 1.5V fixed
Output current capacity: 5A or greater
Package type: TO-220-3 through-hole
Output configuration: Positive
Voltage dropout: 1.4V @ rated current
Operating temperature range: 0°C ~ 125°C
Protection features: Over-current and over-temperature

Parts meeting these criteria are considered direct substitutes regardless of manufacturer or product status differences.

Parameter Comparison

Parameter	LMS1585ACT-1.5	LMS1585ACT-1.5/NOPB	LT1585ACT-1.5#PBF	LT1585CT-1.5#PBF
Manufacturer	Texas Instruments	Texas Instruments	Linear Technology	Linear Technology
Output Voltage (Fixed)	1.5V	1.5V	1.5V	1.5V
Voltage - Input (Max)	13V	13V	7V	7V
Current - Output	5A	5A	5A	4.6A
Voltage Dropout (Max)	1.4V @ 5A	1.4V @ 5A	1.4V @ 5A	1.4V @ 4.6A
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Operating Temperature	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Not specified	Not specified

Engineering Selection Recommendations

Primary Substitute: LMS1585ACT-1.5/NOPB

This part is the direct equivalent from Texas Instruments with identical electrical specifications and TO-220-3 packaging. It maintains full compatibility with the original LMS1585ACT-1.5 design while offering active product status and ROHS3 compliance. This is the preferred choice for direct replacement in existing designs.

Alternative Substitutes: LT1585ACT-1.5#PBF and LT1585CT-1.5#PBF

These Linear Technology parts provide functional equivalence with identical output voltage, dropout characteristics, and package format. Both devices are active products with additional short-circuit protection. The LT1585ACT-1.5#PBF maintains the full 5A output current specification. The LT1585CT-1.5#PBF operates at 4.6A maximum output current, which may require design verification if the application demands the full 5A specification. Both parts operate with reduced maximum input voltage (7V vs. 13V), requiring confirmation that input voltage levels in the target application do not exceed 7V.

Frequently Asked Questions (FAQ)

Q: Can LMS1585ACT-1.5/NOPB be used as a direct drop-in replacement for LMS1585ACT-1.5?

A: Yes. The LMS1585ACT-1.5/NOPB is electrically and mechanically identical to the original part, with the same output voltage, current rating, dropout voltage, and TO-220-3 package. The primary difference is product status (active vs. obsolete) and improved RoHS compliance.

Q: What is the key limitation when using LT1585ACT-1.5#PBF or LT1585CT-1.5#PBF?

A: The maximum input voltage is reduced from 13V to 7V. Applications requiring input voltages above 7V cannot use these Linear Technology alternatives. Additionally, LT1585CT-1.5#PBF has a maximum output current of 4.6A instead of 5A, which must be verified against application requirements.

Q: Are the Linear Technology parts pin-compatible with the original LMS1585ACT-1.5?

A: Yes. All substitute parts use the TO-220-3 package with identical pin configuration, enabling direct board-level replacement without layout modifications.

Q: Do the substitute parts offer any additional protection features?

A: The LT1585ACT-1.5#PBF and LT1585CT-1.5#PBF include short-circuit protection in addition to over-current and over-temperature protection, providing enhanced device protection compared to the original LMS1585ACT-1.5.

Q: Which substitute part should be selected for new designs?

A: LMS1585ACT-1.5/NOPB is recommended for new designs due to active product status, full specification compatibility, and ROHS3 compliance. This ensures long-term availability and regulatory alignment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message