MIC38C45ABMM Equivalent & Substitute Parts

Part Overview

The MIC38C45ABMM is a DC-DC controller IC from Microchip Technology designed for multi-topology power management applications. This device functions as a transistor driver for buck, boost, flyback, and forward converter topologies, supporting step-up, step-down, and combined step-up/step-down voltage conversion with positive output configuration and isolation capability.

The MIC38C45ABMM is currently discontinued at DiGi Electronics, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. Direct substitutes maintain identical electrical specifications and package requirements while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Output Type	Transistor Driver
Topology Support	Buck, Boost, Flyback, Forward Converter
Function	Step-Up, Step-Down, Step-Up/Step-Down
Output Configuration	Positive, Isolation Capable
Number of Outputs	1
Output Phases	1
Voltage Supply Range (Vcc/Vdd)	7.6V ~ 20V
Switching Frequency	500kHz
Maximum Duty Cycle	50%
Synchronous Rectifier	Yes
Control Features	Frequency Control
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-MSOP
Base Product Number	MIC38C45

Substitute Part Grouping Explanation

The MIC38C45AYMM qualifies as a direct substitute for the MIC38C45ABMM based on strict parameter equivalence across all electrical and mechanical specifications. Substitution is valid when the following criteria are met:

Mandatory Matching Parameters:

Identical base product number (MIC38C45)
Identical output type (Transistor Driver)
Identical topology support (Buck, Boost, Flyback, Forward Converter)
Identical function (Step-Up, Step-Down, Step-Up/Step-Down)
Identical output configuration (Positive, Isolation Capable)
Identical voltage supply range (7.6V ~ 20V)
Identical switching frequency (500kHz)
Identical maximum duty cycle (50%)
Identical synchronous rectifier capability (Yes)
Identical control features (Frequency Control)
Identical operating temperature range (-40°C ~ 85°C)
Identical package specification (8-MSOP)

The MIC38C45AYMM meets all these requirements, establishing full functional and physical compatibility with the discontinued MIC38C45ABMM.

Parameter Comparison

Parameter	MIC38C45ABMM	MIC38C45AYMM
Manufacturer	Microchip Technology	Microchip Technology
Output Type	Transistor Driver	Transistor Driver
Topology Support	Buck, Boost, Flyback, Forward Converter	Buck, Boost, Flyback, Forward Converter
Function	Step-Up, Step-Down, Step-Up/Step-Down	Step-Up, Step-Down, Step-Up/Step-Down
Output Configuration	Positive, Isolation Capable	Positive, Isolation Capable
Number of Outputs	1	1
Output Phases	1	1
Voltage Supply Range (Vcc/Vdd)	7.6V ~ 20V	7.6V ~ 20V
Switching Frequency	500kHz	500kHz
Maximum Duty Cycle	50%	50%
Synchronous Rectifier	Yes	Yes
Control Features	Frequency Control	Frequency Control
Operating Temperature Range	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-MSOP	8-MSOP
Base Product Number	MIC38C45	MIC38C45
Product Status	Discontinued at DiGi Electronics	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The MIC38C45AYMM is the appropriate selection for applications currently using or specifying the MIC38C45ABMM. Both parts share identical electrical and mechanical specifications, ensuring drop-in compatibility at the circuit level.

The MIC38C45AYMM offers additional advantages in terms of product lifecycle and regulatory compliance. The part maintains active product status with established supply channels, whereas the MIC38C45ABMM is discontinued. The MIC38C45AYMM achieves ROHS3 compliance, meeting current environmental and regulatory requirements, compared to the non-compliant status of the MIC38C45ABMM.

Both parts maintain equivalent moisture sensitivity levels and REACH compliance status. Selection of the MIC38C45AYMM supports long-term design sustainability and regulatory alignment without requiring circuit modifications or performance trade-offs.

Frequently Asked Questions (FAQ)

Q: Can the MIC38C45AYMM replace the MIC38C45ABMM in existing designs?

A: Yes. The MIC38C45AYMM is a direct substitute with identical electrical specifications, output type, topology support, voltage supply range, switching frequency, duty cycle, synchronous rectifier capability, control features, operating temperature range, and 8-MSOP package configuration. No circuit modifications are required.

Q: What is the primary difference between these two parts?

A: The MIC38C45ABMM is discontinued, while the MIC38C45AYMM maintains active product status. Additionally, the MIC38C45AYMM achieves ROHS3 compliance, whereas the MIC38C45ABMM is RoHS non-compliant. All functional and electrical parameters remain identical.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 8-MSOP package with identical dimensions of 0.118" width and 3.00mm height. PCB footprints and component placement are fully compatible.

Q: Does the MIC38C45AYMM support the same topologies as the MIC38C45ABMM?

A: Yes. Both parts support buck, boost, flyback, and forward converter topologies with identical step-up, step-down, and combined step-up/step-down functionality. Output configuration, isolation capability, and control features are identical.

Q: What is the supply voltage range for the MIC38C45AYMM?

A: The supply voltage range is 7.6V to 20V (Vcc/Vdd), identical to the MIC38C45ABMM. Operating temperature range is -40°C to 85°C.

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