SPX1587AT-L Equivalent & Substitute Parts

Part Overview

The SPX1587AT-L is a linear voltage regulator IC from MaxLinear, Inc., designed for positive adjustable output applications with 3A current capacity in a TO-263-3 surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The SPX1587AT-L provides adjustable output voltage regulation from 1.25V to 15V with integrated over-current and over-temperature protection.

Key Parameters

Parameter	SPX1587AT-L
Manufacturer	MaxLinear, Inc.
Product Status	Obsolete
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	10V
Voltage - Output (Min/Fixed)	1.25V
Voltage - Output (Max)	15V
Voltage Dropout (Max)	1.2V @ 3A
Current - Output	3A
PSRR	75dB (120Hz)
Protection Features	Over Current, Over Temperature
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the SPX1587AT-L is determined by the following critical parameters:

Output configuration (positive adjustable)
Output voltage range capability (minimum 1.25V, maximum voltage support)
Current output rating (3A)
Package compatibility (TO-263 family, D2PAK 3-lead configuration)
Protection features (over-current and over-temperature)
Surface mount technology

The LT1587CM#PBF and LT1587CM#TRPBF from Analog Devices Inc. meet these substitution criteria. Both devices are active products with identical output current (3A), adjustable positive output configuration, and compatible TO-263 packaging. The primary differences are packaging format (Tube vs. Tape & Reel) and operating temperature range, which do not affect functional substitution in most applications.

Parameter Comparison

Parameter	SPX1587AT-L	LT1587CM#PBF	LT1587CM#TRPBF
Manufacturer	MaxLinear, Inc.	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Number of Regulators	1	1	1
Voltage - Input (Max)	10V	7V	7V
Voltage - Output (Min/Fixed)	1.25V	1.25V	1.25V
Voltage - Output (Max)	15V	5.5V	5.5V
Voltage Dropout (Max)	1.2V @ 3A	1.3V @ 3A	1.3V @ 3A
Current - Output	3A	3A	3A
Current - Quiescent (Iq)	Not specified	10 mA	10 mA
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The LT1587CM#PBF and LT1587CM#TRPBF are functionally equivalent substitutes for the obsolete SPX1587AT-L. Both Analog Devices parts are active products with ROHS3 compliance and superior moisture sensitivity ratings (MSL 1 vs. MSL 3).

Selection between the two Analog Devices alternatives depends on procurement requirements: LT1587CM#PBF is supplied in Tube packaging, while LT1587CM#TRPBF is supplied in Tape & Reel format for automated assembly processes.

Design consideration: The LT1587 variants support a maximum input voltage of 7V compared to the SPX1587AT-L's 10V specification, and maximum output voltage of 5.5V versus 15V. Verify that your application's input and output voltage requirements fall within the LT1587 operating range before implementation.

Frequently Asked Questions (FAQ)

Q: Can LT1587CM#PBF and LT1587CM#TRPBF be used interchangeably with SPX1587AT-L?

A: Both LT1587 variants are functionally equivalent for applications requiring adjustable positive output voltage regulation at 3A output current with TO-263 packaging. The primary difference is packaging format (Tube vs. Tape & Reel). Verify that your application's input voltage (maximum 7V for LT1587 vs. 10V for SPX1587AT-L) and output voltage requirements (maximum 5.5V for LT1587 vs. 15V for SPX1587AT-L) are compatible.

Q: What is the difference between LT1587CM#PBF and LT1587CM#TRPBF?

A: Both parts are identical in electrical specifications and package type (TO-263). The difference is packaging format: LT1587CM#PBF uses Tube packaging for manual handling and lower-volume applications, while LT1587CM#TRPBF uses Tape & Reel format for automated pick-and-place assembly in production environments.

Q: Are the LT1587 parts RoHS compliant?

A: Yes, both LT1587CM#PBF and LT1587CM#TRPBF are ROHS3 compliant. The SPX1587AT-L RoHS status is not specified in available documentation.

Q: What is the operating temperature range difference?

A: The SPX1587AT-L operates from -40°C to 125°C, while both LT1587 variants operate from 0°C to 125°C. Applications requiring operation below 0°C are not suitable for the LT1587 substitutes.

Q: Do the LT1587 parts offer additional protection features?

A: Yes, the LT1587CM#PBF and LT1587CM#TRPBF include short-circuit protection in addition to over-current and over-temperature protection found in the SPX1587AT-L.

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