SPX1117T-L Equivalent & Substitute Parts

Part Overview

The SPX1117T-L is a linear voltage regulator IC from MaxLinear, Inc., designed for positive adjustable output applications with 800mA current capacity in a TO-263-3 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	SPX1117T-L
Manufacturer	MaxLinear, Inc.
Product Status	Obsolete
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	20V
Voltage - Output (Min/Fixed)	1.25V
Voltage - Output (Max)	15V
Voltage Dropout (Max)	1.3V @ 800mA
Current - Output	800mA
Current - Quiescent (Iq)	10 mA
PSRR	70dB (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 SPX1117T-L is determined by the following critical parameters:

Output configuration (Positive) and type (Adjustable)
Output current capacity (800mA)
Output voltage range (1.25V minimum to 13.7V–15V maximum)
Voltage dropout characteristics (1.2V–1.3V @ 800mA)
Package compatibility (TO-263 / DDPAK-3 surface mount)
Protection features (Over Current and/or Over Temperature)
Operating temperature range (-40°C to 125°C preferred for extended industrial applications)

The substitute parts listed below meet these core electrical and mechanical requirements. Differences in product status, RoHS compliance, and MSL ratings are noted for procurement and manufacturing planning purposes.

Parameter Comparison

Parameter	SPX1117T-L	LT1117CM#PBF	LT1117CM#TRPBF	TLV1117CKTTR	TLV1117CKTTRG3	TLV1117IKTTR
Manufacturer	MaxLinear, Inc.	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Obsolete	Obsolete	Last Time Buy
Output Configuration	Positive	Positive	Positive	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable
Number of Regulators	1	1	1	1	1	1
Voltage - Input (Max)	20V	15V	15V	15V	15V	15V
Voltage - Output (Min/Fixed)	1.25V	1.25V	1.25V	1.25V	1.25V	1.25V
Voltage - Output (Max)	15V	13.8V	13.8V	13.7V	13.7V	13.7V
Voltage Dropout (Max)	1.3V @ 800mA	1.2V @ 800mA	1.2V @ 800mA	1.3V @ 800mA	1.3V @ 800mA	1.3V @ 800mA
Current - Output	800mA	800mA	800mA	800mA	800mA	800mA
Current - Quiescent (Iq)	10 mA	—	—	10 mA	10 mA	—
PSRR	70dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)
Protection Features	Over Current, Over Temperature	Over Temperature	Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature
Operating Temperature	-40°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	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	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	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

LT1117CM#PBF and LT1117CM#TRPBF (Analog Devices Inc.)

These parts are the primary recommended substitutes. Both are active products with ROHS3 compliance and MSL 1 rating, providing superior moisture handling for storage and manufacturing. The LT1117CM#TRPBF is supplied in Tape & Reel packaging, suitable for automated assembly. The LT1117CM#PBF is supplied in Tube packaging for manual handling. Both feature improved PSRR (75dB vs. 70dB) and lower dropout voltage (1.2V vs. 1.3V). The maximum input voltage is 15V compared to the SPX1117T-L's 20V; applications requiring higher input voltages must be evaluated separately.

TLV1117IKTTR (Texas Instruments)

This part is classified as Last Time Buy and supports the full operating temperature range (-40°C to 125°C) matching the SPX1117T-L. It includes both Over Current and Over Temperature protection. MSL 3 rating requires standard moisture control during storage and assembly. This option is suitable for designs requiring extended temperature performance.

TLV1117CKTTR and TLV1117CKTTRG3 (Texas Instruments)

Both are obsolete products with identical electrical specifications. They provide Over Current and Over Temperature protection with 75dB PSRR. Operating temperature range is limited to 0°C to 125°C. MSL 3 rating applies. These parts are suitable for applications where extended low-temperature operation is not required.

Frequently Asked Questions (FAQ)

Q: Can LT1117CM#PBF or LT1117CM#TRPBF be used as direct replacements for SPX1117T-L?

A: Yes, with one design consideration. Both Analog Devices parts are electrically compatible and pin-compatible in the TO-263 package. The maximum input voltage is 15V instead of 20V. If your application operates at input voltages above 15V, these parts are not suitable. For input voltages up to 15V, they are direct replacements with improved performance characteristics.

Q: What is the difference between LT1117CM#PBF and LT1117CM#TRPBF?

A: Both parts are identical electrically and mechanically. The difference is packaging: LT1117CM#PBF is supplied in Tube packaging for manual component handling, while LT1117CM#TRPBF is supplied in Tape & Reel (TR) format for automated pick-and-place assembly. Select based on your manufacturing process requirements.

Q: Why do some substitutes have lower maximum output voltage (13.7V–13.8V vs. 15V)?

A: The SPX1117T-L supports adjustable output up to 15V, while most substitute parts support up to 13.7V–13.8V. For applications requiring output voltages above 13.8V, the SPX1117T-L specifications must be maintained. For applications using output voltages up to 13.7V, substitutes are fully compatible.

Q: What does MSL 1 vs. MSL 3 mean for component handling?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption limits. MSL 1 (Unlimited) means the component can be stored indefinitely without moisture control. MSL 3 (168 Hours) means the component must be used within 168 hours of opening the moisture barrier bag. Analog Devices LT1117 parts (MSL 1) offer superior shelf-life and storage flexibility compared to Texas Instruments TLV1117 parts (MSL 3).

Q: Which substitute should I select for new designs?

A: For new designs, LT1117CM#TRPBF is the recommended choice. It is an active product with ROHS3 compliance, superior moisture handling (MSL 1), improved performance specifications, and Tape & Reel packaging for modern manufacturing processes.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The SPX1117T-L RoHS status was not specified in the provided data.

Q: Can I use TLV1117IKTTR if my application requires -40°C operation?

A: Yes. TLV1117IKTTR supports the full operating temperature range of -40°C to 125°C, matching the SPX1117T-L. Other TLV1117 variants (CKTTR, CKTTRG3) are limited to 0°C to 125°C and are not suitable for extended low-temperature applications.

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