MIC38HC43-1BN Equivalent & Substitute Parts

Part Overview

The MIC38HC43-1BN 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 MIC38HC43-1BN is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this controller.

Substiute Parts

MIC38HC43-1BN

Microchip TechnologyIn Stock: 2821MIC38HC43-1BN Datasheet

Current PartRFQ

MIC38HC43-1YN

Microchip TechnologyIn Stock: 942MIC38HC43-1YN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC38HC43-1BN are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Package / Case: 14-DIP (0.300", 7.62mm)
• Topology: Buck, Boost, Flyback, Forward Converter
• Function: Step-Up, Step-Down, Step-Up/Step-Down
• Output Type: Transistor Driver
• Output Configuration: Positive, Isolation Capable
• Voltage - Supply (Vcc/Vdd): 7.6V ~ 20V
• Duty Cycle (Max): 96%
• Synchronous Rectifier: Yes
• Control Features: Frequency Control
• Operating Temperature: -40°C ~ 85°C (TA)

The MIC38HC43-1YN meets all critical electrical and mechanical parameters required for direct substitution. The primary difference is packaging format (tube versus bulk) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

The MIC38HC43-1YN is the direct substitute for the MIC38HC43-1BN. Both parts share identical electrical specifications and mechanical packaging, ensuring functional compatibility in existing circuit designs.

Product Status Consideration: The MIC38HC43-1BN is obsolete, while the MIC38HC43-1YN is active. Selection of the active part ensures long-term availability and supply chain continuity.

Compliance Consideration: The MIC38HC43-1YN carries ROHS3 compliance certification, whereas the MIC38HC43-1BN is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the MIC38HC43-1YN is the appropriate selection.

Packaging Consideration: The MIC38HC43-1YN is supplied in tube packaging, while the MIC38HC43-1BN packaging format is not specified. Both use identical 14-DIP package geometry and are surface-mount compatible.

Frequently Asked Questions (FAQ)

Q: Can the MIC38HC43-1YN directly replace the MIC38HC43-1BN in existing designs?

A: Yes. The MIC38HC43-1YN is electrically and mechanically identical to the MIC38HC43-1BN. All electrical parameters, including supply voltage range (7.6V ~ 20V), duty cycle (96%), topology support, and operating temperature range (-40°C ~ 85°C) are matched. No circuit modifications are required.

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

A: The MIC38HC43-1YN is an active product with ROHS3 compliance, while the MIC38HC43-1BN is obsolete and RoHS non-compliant. The MIC38HC43-1YN is supplied in tube packaging format.

Q: Are there any pin configuration differences between the MIC38HC43-1BN and MIC38HC43-1YN?

A: No. Both parts use the 14-DIP package with identical pin configuration and spacing (0.300", 7.62mm).

Q: Which part should be selected for new designs?

A: The MIC38HC43-1YN should be selected for new designs. It is an active product with current manufacturer support and regulatory compliance.

Q: Is the MIC38HC43-1YN suitable for applications requiring RoHS compliance?

A: Yes. The MIC38HC43-1YN carries ROHS3 compliance certification and is suitable for applications with RoHS regulatory requirements.