MIC2145BML Equivalent & Substitute Parts

Part Overview

The MIC2145BML is a multi-configuration adjustable switching regulator IC from Microchip Technology, designed for boost, flyback, and SEPIC topologies. It delivers positive adjustable output with a maximum current of 500mA and operates across an input voltage range of 2.4V to 16V. The device is packaged in a 10-VFDFN Exposed Pad (10-MLF®) surface mount package.

The MIC2145BML is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator topology.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Function	Step-Up, Step-Up/Step-Down
Topology	Boost, Flyback, SEPIC
Output Configuration	Positive
Output Type	Adjustable
Number of Outputs	1
Voltage - Input (Min)	2.4V
Voltage - Input (Max)	16V
Voltage - Output (Min/Fixed)	2.4V
Voltage - Output (Max)	16V
Current - Output	500mA
Frequency - Switching	450kHz
Synchronous Rectifier	No
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	10-VFDFN Exposed Pad, 10-MLF®
Supplier Device Package	10-MLF® (3x3)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MIC2145BML is determined by strict equivalence across the following critical parameters:

Topology and Function: Boost, Flyback, and SEPIC switching regulator capability with Step-Up and Step-Up/Step-Down functionality
Electrical Specifications: Input voltage range (2.4V to 16V), adjustable output voltage range (2.4V to 16V), and output current rating (500mA)
Switching Frequency: 450kHz operation
Output Configuration: Single positive adjustable output
Package Compatibility: 10-VFDFN Exposed Pad, 10-MLF® (3x3) surface mount package
Operating Temperature Range: -40°C to 85°C

The MIC2145YML meets all these criteria and is identified as a direct substitute. Both parts share identical electrical and mechanical specifications, with the primary distinction being product status and compliance certifications.

Parameter Comparison

Parameter	MIC2145BML	MIC2145YML
Manufacturer	Microchip Technology	Microchip Technology
Base Product Number	MIC2145	MIC2145
Function	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down
Topology	Boost, Flyback, SEPIC	Boost, Flyback, SEPIC
Output Configuration	Positive	Positive
Output Type	Adjustable	Adjustable
Number of Outputs	1	1
Voltage - Input (Min)	2.4V	2.4V
Voltage - Input (Max)	16V	16V
Voltage - Output (Min/Fixed)	2.4V	2.4V
Voltage - Output (Max)	16V	16V
Current - Output	500mA	500mA
Frequency - Switching	450kHz	450kHz
Synchronous Rectifier	No	No
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	10-VFDFN Exposed Pad, 10-MLF®	10-VFDFN Exposed Pad, 10-MLF®
Supplier Device Package	10-MLF® (3x3)	10-MLF® (3x3)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Packaging	Not specified	Tube

Engineering Selection Recommendations

The MIC2145YML is the direct substitute for the obsolete MIC2145BML. Both devices are electrically and mechanically identical across all specified parameters. The MIC2145YML offers the following advantages:

Active Product Status: The MIC2145YML is actively manufactured and supported by Microchip Technology, ensuring long-term availability and supply chain stability.
Regulatory Compliance: The MIC2145YML is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.
Packaging Availability: The MIC2145YML is supplied in tube packaging, facilitating standard component handling and automated assembly processes.

Selection of the MIC2145YML is appropriate for all applications previously designed with the MIC2145BML, with no circuit modifications or design changes required.

Frequently Asked Questions (FAQ)

Q: Can the MIC2145YML be used as a direct replacement for the MIC2145BML?

A: Yes. The MIC2145YML is a direct substitute. Both parts share identical electrical specifications, output configurations, switching frequency, and package geometry. No circuit modifications are required.

Q: What is the difference between the MIC2145BML and MIC2145YML?

A: The primary differences are product status and compliance certifications. The MIC2145BML is obsolete and RoHS non-compliant, while the MIC2145YML is an active product with ROHS3 compliance. Electrical and mechanical specifications are identical.

Q: Are there any package compatibility concerns?

A: No. Both parts use the identical 10-VFDFN Exposed Pad, 10-MLF® (3x3) surface mount package. PCB footprints and assembly processes remain unchanged.

Q: Does the MIC2145YML support the same topologies as the MIC2145BML?

A: Yes. The MIC2145YML supports boost, flyback, and SEPIC switching regulator topologies with identical step-up and step-up/step-down functionality.

Q: What are the voltage and current specifications for the MIC2145YML?

A: Input voltage range is 2.4V to 16V, adjustable output voltage range is 2.4V to 16V, and maximum output current is 500mA. Operating temperature range is -40°C to 85°C.

Q: Is the MIC2145YML suitable for new designs?

A: Yes. The MIC2145YML is an active product with current regulatory compliance (ROHS3), making it suitable for new designs and production applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message