SPX3819S-L-5-0 Equivalent & Substitute Parts

Part Overview

The SPX3819S-L-5-0 is a linear voltage regulator IC from MaxLinear, Inc., designed to deliver a fixed 5V output at 500mA with a maximum dropout voltage of 0.7V. This Surface Mount device in 8-SOIC packaging integrates over-current, over-temperature, and reverse polarity protection with an enable control feature. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	5V
Voltage - Input (Max)	16V
Current - Output	500mA
Voltage Dropout (Max)	0.7V @ 500mA
Operating Temperature	-40°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Protection Features	Over Current, Over Temperature, Reverse Polarity
Control Features	Enable

Substitute Part Grouping Explanation

Substitution for the SPX3819S-L-5-0 is determined by strict equivalence across the following critical parameters:

Fixed 5V output voltage
500mA output current capability
16V maximum input voltage rating
8-SOIC surface mount package with identical 0.154" (3.90mm) width
Enable control feature
Over-current, over-temperature, and reverse polarity protection
Operating temperature range of -40°C to 125°C

The MIC5209-5.0YM and MIC5209-5.0YM-TR meet all substitution criteria. Both are Microchip Technology linear voltage regulators with identical electrical specifications and package configuration. The primary distinction between these substitutes is packaging format: MIC5209-5.0YM-TR is supplied in Cut Tape (CT) & Digi-Reel format, while MIC5209-5.0YM is supplied in Tube format.

Parameter Comparison

Parameter	SPX3819S-L-5-0	MIC5209-5.0YM-TR	MIC5209-5.0YM
Manufacturer	MaxLinear, Inc.	Microchip Technology	Microchip Technology
Output Configuration	Positive	Positive	Positive
Output Type	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	5V	5V	5V
Voltage - Input (Max)	16V	16V	16V
Current - Output	500mA	500mA	500mA
Voltage Dropout (Max)	0.7V @ 500mA	0.6V @ 500mA	0.6V @ 500mA
Current - Quiescent (Iq)	8 µA	170 µA	170 µA
Current - Supply (Max)	30 mA	25 mA	25 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity
Control Features	Enable	Enable	Enable
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both MIC5209-5.0YM-TR and MIC5209-5.0YM are direct functional equivalents to the SPX3819S-L-5-0. Selection between these two Microchip alternatives depends on packaging and supply chain requirements:

MIC5209-5.0YM-TR is the manufacturer-recommended substitute, supplied in Cut Tape (CT) & Digi-Reel format with 40,400 units in stock. This packaging format is optimized for automated assembly processes and high-volume production environments.

MIC5209-5.0YM is a parametric equivalent supplied in Tube packaging with 1,523 units in stock. This format is suitable for lower-volume applications or manual assembly workflows.

Both substitutes are ROHS3 compliant and maintain active product status, ensuring long-term availability and supply chain stability. The MIC5209 series demonstrates improved dropout voltage performance (0.6V versus 0.7V) and equivalent supply current specifications, making either option suitable for direct replacement in the SPX3819S-L-5-0 application.

Frequently Asked Questions (FAQ)

Q: Can MIC5209-5.0YM-TR and MIC5209-5.0YM be used interchangeably with SPX3819S-L-5-0?

A: Yes. Both MIC5209 variants meet all electrical and mechanical substitution criteria, including fixed 5V output, 500mA current capacity, 16V input rating, 8-SOIC package configuration, and identical protection and control features. The only difference between the two MIC5209 options is packaging format (Cut Tape/Digi-Reel versus Tube).

Q: What is the difference between MIC5209-5.0YM-TR and MIC5209-5.0YM?

A: Both parts are electrically identical. MIC5209-5.0YM-TR is supplied in Cut Tape (CT) & Digi-Reel format, suitable for automated pick-and-place assembly. MIC5209-5.0YM is supplied in Tube format, suitable for manual handling or lower-volume applications. Select based on your assembly process requirements.

Q: Are there any performance differences between SPX3819S-L-5-0 and the MIC5209 substitutes?

A: The MIC5209 series offers improved dropout voltage performance at 0.6V compared to the SPX3819S-L-5-0 at 0.7V, resulting in better efficiency. Quiescent current is higher in the MIC5209 (170 µA versus 8 µA), which may impact low-power standby applications. All other electrical parameters remain equivalent.

Q: Is the 8-SOIC package pinout identical?

A: Yes. Both the SPX3819S-L-5-0 and MIC5209 series use the standard 8-SOIC package with 0.154" (3.90mm) width. Pinout compatibility must be verified against specific application schematics, but the package footprint and standard pin assignments are identical.

Q: What is the compliance status of the substitute parts?

A: Both MIC5209-5.0YM-TR and MIC5209-5.0YM are ROHS3 compliant and REACH unaffected. The original SPX3819S-L-5-0 is RoHS compliant. All parts carry EAR99 ECCN classification and HTSUS code 8542.39.0001.

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