MIC5219-2.5BM5-TR Equivalent & Substitute Parts

Part Overview

The MIC5219-2.5BM5-TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 2.5V output at 500mA in a SOT-23-5 surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device provides regulated power with integrated protection features including over-current, over-temperature, and reverse polarity protection, suitable for applications requiring stable low-voltage power delivery.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	500mA
Input Voltage (Max)	12V
Voltage Dropout (Max)	0.6V @ 500mA
Quiescent Current	8 µA
PSRR	75dB (120Hz)
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity

Substitute Part Grouping Explanation

Substitution for the MIC5219-2.5BM5-TR is determined by the following critical parameters: fixed 2.5V output voltage, SOT-23-5 package compatibility, surface mount mounting type, and enable control feature. Substitute parts must maintain the same output voltage and package form factor to ensure direct replacement capability.

The substitute parts are grouped into two categories:

Parametric Equivalent (Direct Replacement): MIC5219-2.5YM5-TR maintains identical electrical specifications and differs only in packaging format (Cut Tape & Digi-Reel vs. Tape & Reel).

Manufacturer Recommended Alternatives: REG113NA-2.5/250, REG113NA-2.5/3K, and SPX3819M5-L-2-5/TR provide functional equivalence with variations in maximum input voltage, output current capability, and dropout voltage characteristics.

Parameter Comparison

Parameter	MIC5219-2.5BM5-TR	MIC5219-2.5YM5-TR	REG113NA-2.5/250	REG113NA-2.5/3K	SPX3819M5-L-2-5/TR
Manufacturer	Microchip Technology	Microchip Technology	Texas Instruments	Texas Instruments	MaxLinear, Inc.
Output Voltage	2.5V	2.5V	2.5V	2.5V	2.5V
Output Current	500mA	500mA	400mA	400mA	500mA
Input Voltage (Max)	12V	12V	10V	10V	16V
Voltage Dropout (Max)	0.6V @ 500mA	0.6V @ 500mA	0.41V @ 400mA	0.41V @ 400mA	0.7V @ 500mA
Quiescent Current	8 µA	8 µA	500 µA	500 µA	8 µA
PSRR	75dB (120Hz)	75dB (120Hz)	65dB (120Hz)	65dB (120Hz)	Not specified
Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 85°C	-40°C to 85°C	-40°C to 125°C
Product Status	Discontinued	Active	Last Time Buy	Last Time Buy	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

MIC5219-2.5YM5-TR is the direct parametric equivalent with identical electrical performance and is recommended as the primary replacement. This part is currently active and ROHS3 compliant, providing continuity with the original design specifications.

SPX3819M5-L-2-5/TR is suitable for applications where higher input voltage tolerance (16V maximum) is beneficial. This part maintains 500mA output current and 8 µA quiescent current matching the original specification. It is active and RoHS compliant with extended operating temperature range (-40°C to 125°C).

REG113NA-2.5/250 and REG113NA-2.5/3K are Texas Instruments alternatives suitable only for applications where 400mA output current is sufficient. These parts have lower quiescent current (500 µA) and reduced PSRR (65dB). Both are in Last Time Buy status and ROHS3 compliant. The maximum input voltage is limited to 10V, which may restrict use in higher voltage input applications.

Selection should prioritize active parts (MIC5219-2.5YM5-TR or SPX3819M5-L-2-5/TR) for new designs. Last Time Buy parts should be evaluated only for legacy system support with confirmed long-term availability.

Frequently Asked Questions (FAQ)

Q: Can MIC5219-2.5YM5-TR directly replace MIC5219-2.5BM5-TR?

A: Yes. Both parts are identical in electrical specifications and package type (SOT-23-5). The only difference is packaging format: MIC5219-2.5YM5-TR is supplied in Cut Tape & Digi-Reel format while MIC5219-2.5BM5-TR is Tape & Reel. Electrical performance and pinout are identical.

Q: What are the limitations of REG113NA-2.5 series substitutes?

A: REG113NA-2.5/250 and REG113NA-2.5/3K reduce output current from 500mA to 400mA and limit maximum input voltage to 10V compared to the original 12V specification. Quiescent current increases to 500 µA from 8 µA. These parts are suitable only for applications with lower current requirements and lower input voltage rails.

Q: Is SPX3819M5-L-2-5/TR compatible with the original design?

A: SPX3819M5-L-2-5/TR maintains 500mA output current and 8 µA quiescent current with identical SOT-23-5 packaging. It supports higher input voltage (16V maximum vs. 12V original). Dropout voltage is slightly higher (0.7V vs. 0.6V). This part is suitable for designs requiring higher input voltage tolerance.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Both are surface mount delivery formats. Tape & Reel (TR) provides parts on continuous tape in reel format for automated assembly. Cut Tape & Digi-Reel (CT) provides the same parts cut from tape or on smaller reels. Electrical specifications and component performance are identical; packaging format affects only handling and assembly logistics.

Q: Should I use Last Time Buy parts for new designs?

A: No. Last Time Buy status indicates limited remaining inventory with no future production. For new designs, use active parts: MIC5219-2.5YM5-TR or SPX3819M5-L-2-5/TR. Last Time Buy parts should be reserved for legacy system support only.

Q: Are all substitute parts RoHS compliant?

A: MIC5219-2.5BM5-TR is RoHS non-compliant. All substitute parts (MIC5219-2.5YM5-TR, REG113NA-2.5/250, REG113NA-2.5/3K, and SPX3819M5-L-2-5/TR) are RoHS compliant, meeting current environmental and regulatory requirements.

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