MIC38HC45-1BN Equivalent & Substitute Parts

Part Overview

The MIC38HC45-1BN is a multi-topology DC-DC controller IC manufactured by Microchip Technology, designed for buck, boost, flyback, and forward converter applications. This 14-DIP package device functions as a transistor driver for step-up, step-down, and step-up/step-down voltage regulation with positive output configuration and isolation capability.

The MIC38HC45-1BN is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for applications currently utilizing this controller.

Substiute Parts

MIC38HC45-1BN

Microchip TechnologyIn Stock: 1061MIC38HC45-1BN Datasheet

Current PartRFQ

MIC38HC45-1YN

Microchip TechnologyIn Stock: 1122MIC38HC45-1YN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC38HC45-1BN is determined by strict equivalence across the following critical parameters:

• Package / Case: 14-DIP (0.300", 7.62mm) form factor
• Output Type: Transistor Driver
• Function: Step-Up, Step-Down, Step-Up/Step-Down capability
• Output Configuration: Positive, Isolation Capable
• Topology: Buck, Boost, Flyback, Forward Converter support
• Number of Outputs: 1
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 7.6V ~ 20V
• Duty Cycle (Max): 50%
• Synchronous Rectifier: Yes
• Control Features: Frequency Control
• Operating Temperature: -40°C ~ 85°C (TA)

The MIC38HC45-1YN meets all these criteria and is classified as a direct substitute. The primary difference is packaging format (tube versus unspecified for the main part) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

The MIC38HC45-1YN is the direct substitute for the MIC38HC45-1BN. Both parts share identical electrical and mechanical specifications across all critical parameters that determine functional compatibility.

The MIC38HC45-1YN offers the advantage of active product status, ensuring continued availability and support from Microchip Technology. Additionally, the MIC38HC45-1YN carries ROHS3 compliance, whereas the MIC38HC45-1BN is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the MIC38HC45-1YN is the appropriate selection.

Both parts are supplied in 14-DIP packaging and are suitable for direct socket replacement in existing designs. No circuit modifications are required when transitioning from MIC38HC45-1BN to MIC38HC45-1YN.

Frequently Asked Questions (FAQ)

Q: Can MIC38HC45-1YN be used as a direct replacement for MIC38HC45-1BN?

A: Yes. The MIC38HC45-1YN is electrically and mechanically equivalent to the MIC38HC45-1BN across all specified parameters. Both devices support identical topologies, voltage ranges, output configurations, and operating temperatures. Direct socket replacement is possible without circuit modification.

Q: What is the difference between MIC38HC45-1BN and MIC38HC45-1YN?

A: The primary differences are product status and regulatory compliance. The MIC38HC45-1BN is obsolete and RoHS non-compliant. The MIC38HC45-1YN is active and ROHS3 compliant. Packaging format differs (tube for MIC38HC45-1YN). All electrical and mechanical specifications are identical.

Q: Are there any pin configuration differences between these parts?

A: No. Both parts use the 14-DIP (0.300", 7.62mm) package with identical pin assignments. Pin-for-pin compatibility is confirmed.

Q: Which part should be selected for new designs?

A: The MIC38HC45-1YN should be selected for new designs. It is an active product with current manufacturer support and ROHS3 compliance, making it suitable for modern applications and regulatory environments.

Q: Is the MIC38HC45-1YN available in the same packaging options?

A: The MIC38HC45-1YN is supplied in tube packaging. Both parts maintain the same 14-DIP form factor and are compatible with standard DIP sockets and PCB layouts.