MIC5209-5.0BS Equivalent & Substitute Linear Voltage Regulators Reference

Part Overview

The MIC5209-5.0BS from Microchip Technology is a positive fixed linear voltage regulator with a 5V output, 500mA maximum output current, and a SOT-223-3 surface mount package. This component is classified as a Power Management IC (PMIC) and is designed for applications requiring accurate, low-dropout regulation with protection features such as over current, over temperature, and reverse polarity. As the MIC5209-5.0BS is obsolete, it is necessary to identify functionally equivalent alternatives to ensure design continuity in existing and future assemblies.

Key Parameters

Parameter	Value
Manufacturer Part Number	MIC5209-5.0BS
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Number of Regulators	1
Voltage - Input (Max)	16V
Voltage - Output (Fixed)	5V
Voltage Dropout (Max)	0.6V @ 500mA
Current - Output	500mA
Current - Quiescent (Iq)	170 µA
Current - Supply (Max)	25 mA
PSRR	75dB (120Hz)
Protection Features	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-3
RoHS Status	RoHS non-compliant
MSL	3 (168 Hours)

Substitute Part Grouping Explanation

Acceptable substitute linear voltage regulators are selected based on the following critical parameters: regulator configuration (positive, fixed), number of outputs, maximum output voltage (5V), maximum output current (≥500mA), voltage dropout performance (at stated load), input voltage tolerance, thermal and electrical safety features, operating temperature range, mounting type (surface mount), and SOT-223 compatible packaging.

Only parts that match or exceed the performance and enclosure parameters of MIC5209-5.0BS are included. All selections are from the same product category and, where relevant, match mechanical and compliance characteristics.

Key substitution parameters:

Output configuration: Positive, Fixed
Output voltage: 5V
Maximum output current: ≥500mA
Dropout voltage: ≤1V @500mA (to match all listed variants)
Input voltage max: ≥6V
Surface mount, SOT-223 or TO-261 compatible
Equivalent or enhanced protection features
Operating temperature: -40°C ~ 125°C (unless otherwise specified)
Compliance and MSL as listed

Parameter Comparison

Manufacturer Part Number	Manufacturer	Output Configuration	Output Type	Number of Regulators	Voltage - Input (Max)	Voltage - Output (Fixed)	Voltage Dropout (Max)	Current - Output	Current - Quiescent (Iq)	Protection Features	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	MSL
MIC5209-5.0BS	Microchip Technology	Positive	Fixed	1	16V	5V	0.6V @ 500mA	500mA	170 µA	Over Current, Over Temperature, Reverse Polarity	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	RoHS non-compliant	3 (168 Hours)
MIC5209-5.0YS	Microchip Technology	Positive	Fixed	1	16V	5V	0.6V @ 500mA	500mA	170 µA	Over Current, Over Temperature, Reverse Polarity	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	ROHS3 Compliant	3 (168 Hours)
TC1262-5.0VDB	Microchip Technology	Positive	Fixed	1	6V	5V	0.65V @ 500mA	500mA	130 µA	Over Current, Over Temperature	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	ROHS3 Compliant	1 (Unlimited)
TC1262-5.0VDBTR	Microchip Technology	Positive	Fixed	1	6V	5V	0.65V @ 500mA	500mA	130 µA	Over Current, Over Temperature	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	ROHS3 Compliant	1 (Unlimited)
LM2937IMP-5.0/NOPB	Texas Instruments	Positive	Fixed	1	26V	5V	1V @ 500mA	500mA	10 mA	Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage	-40°C ~ 85°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SOT-223-4	ROHS3 Compliant	1 (Unlimited)
LM2937IMPX-5.0/NOPB	Texas Instruments	Positive	Fixed	1	26V	5V	1V @ 500mA	500mA	10 mA	Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage	-40°C ~ 85°C (TJ)	Surface Mount	TO-261-4, TO-261AA	SOT-223-4	ROHS3 Compliant	1 (Unlimited)
LT1129CST-5#PBF	Analog Devices Inc.	Positive	Fixed	1	30V	5V	0.7V @ 700mA	700mA	70 µA	Over Temperature, Reverse Polarity	0°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	ROHS3 Compliant	1 (Unlimited)
LT1129CST-5#TRPBF	Analog Devices Inc.	Positive	Fixed	1	30V	5V	0.7V @ 700mA	700mA	70 µA	Over Temperature, Reverse Polarity	0°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	ROHS3 Compliant	1 (Unlimited)
LT1129IST-5#PBF	Analog Devices Inc.	Positive	Fixed	1	30V	5V	0.7V @ 700mA	700mA	70 µA	Over Temperature, Reverse Polarity	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	ROHS3 Compliant	1 (Unlimited)
LT1129IST-5#TRPBF	Analog Devices Inc.	Positive	Fixed	1	30V	5V	0.7V @ 700mA	700mA	70 µA	Over Temperature, Reverse Polarity	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	ROHS3 Compliant	1 (Unlimited)
SPX3940AM3-L-5-0/TR	MaxLinear, Inc.	Positive	Fixed	1	16V	5V	0.55V @ 1A	1A	-	Over Current, Over Temperature, Reverse Polarity, Short Circuit, Transient Voltage	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	RoHS Compliant	1 (Unlimited)
SPX3940M3-L-5-0/TR	MaxLinear, Inc.	Positive	Fixed	1	16V	5V	0.55V @ 1A	1A	-	Over Current, Over Temperature, Reverse Polarity, Short Circuit, Transient Voltage	-40°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3	RoHS Compliant	1 (Unlimited)

Engineering Selection Recommendations

Given that the MIC5209-5.0BS is obsolete and RoHS non-compliant, selection of substitute parts with current active product status and RoHS/ROHS3 compliance is permitted based on the parameters above. All substitute components enumerated in the comparison table satisfy at least the minimum required electrical and mechanical specifications provided in the input data. Differences in MSL, supply current, and protection feature set are noted as listed.

Frequently Asked Questions (FAQ)

Q1: What are the critical electrical and mechanical parameters for substituting MIC5209-5.0BS?
A1: Key parameters include output configuration (positive, fixed), 5V output, maximum output current (≥500mA), dropout voltage at the specified current, input voltage tolerance, surface mount SOT-223/TO-261 packaging, and included protection features.

Q2: Do all listed substitutes have compatible mounting configurations?
A2: All substitutes are specified as SOT-223 (TO-261) surface mount packages. Device fit should be verified based strictly on package codes provided.

Q3: Is RoHS compliance achieved in all substitute parts?
A3: All substitutes listed, except MIC5209-5.0BS itself, are RoHS or ROHS3 compliant per the manufacturer-provided data.

Q4: Are there differences in protection features among the substitute linear regulators?
A4: Substitute parts offer over current and over temperature protection. Some also offer additional protection such as reverse polarity, short circuit, transient voltage, or mirror-image insertion as stated.

Q5: Is it necessary to consider the maximum input voltage when selecting a substitute?
A5: Substitute regulators show a range of maximum input voltage ratings, all of which are provided in the comparison table. Input voltage must not exceed the substitute’s maximum as listed.

Q6: Is the operating temperature range equivalent for all substitutes?
A6: Many substitutes cover the same -40°C ~ 125°C range as MIC5209-5.0BS, with exceptions documented in the table.

Q7: What if a regulator offers higher output current than MIC5209-5.0BS?
A7: Substitute parts with higher maximum current output are included if they otherwise satisfy all other required parameters and protection features.

Q8: Is tape and reel or cut tape packaging relevant for component substitution?
A8: Packaging type (tube, tape & reel, cut tape) is included as provided and may be used to match specific production requirements.

Q9: How are part numbers selected as direct or manufacturer-recommended equivalents?
A9: Manufacturer or series cross-reference data and parameter equivalence, as supplied, are used for selection without assumption or extrapolation.

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