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MIC3172BN Equivalent & Substitute Parts
Part Overview
The MIC3172BN is a multi-configuration switching regulator IC manufactured by Microchip Technology, designed for power management applications requiring flexible topology support. This device functions as a Step-Up, Step-Down, or Step-Up/Step-Down converter with a single output capable of delivering 1.25A. The MIC3172BN operates across an input voltage range of 3V to 40V with a fixed switching frequency of 100kHz and supports positive or negative output configurations.
The MIC3172BN 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 component.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Category | Power Management (PMIC) |
| Function | Step-Up, Step-Down, Step-Up/Step-Down |
| Output Configuration | Positive or Negative |
| Topology | Buck, Boost, Cuk, Flyback, Forward Converter |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 3V |
| Voltage - Input (Max) | 40V |
| Current - Output | 1.25A |
| Frequency - Switching | 100kHz |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Supplier Device Package | 8-PDIP |
| Base Product Number | MIC3172 |
Substitute Part Grouping Explanation
Substitution eligibility for the MIC3172BN is determined by strict equivalence across the following critical parameters:
- Manufacturer & Base Product Number: Both main and substitute parts must originate from Microchip Technology and share the MIC3172 base product number
- Functional Topology: Multi-configuration support for Buck, Boost, Cuk, Flyback, and Forward Converter topologies
- Output Characteristics: Single output with positive or negative configuration capability
- Electrical Specifications: Input voltage range 3V–40V, output current 1.25A, switching frequency 100kHz
- Package & Mounting: 8-DIP (0.300", 7.62mm) through-hole package with 8-PDIP supplier designation
- Operating Temperature Range: -40°C to 85°C (TA)
The MIC3172YN qualifies as a direct substitute based on complete alignment with all specified parameters. The primary distinction between the main part and substitute relates to product status and compliance certifications rather than electrical or mechanical characteristics.
Parameter Comparison
| Parameter | MIC3172BN | MIC3172YN |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Category | Power Management (PMIC) | Power Management (PMIC) |
| Function | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Down, Step-Up/Step-Down |
| Output Configuration | Positive or Negative | Positive or Negative |
| Topology | Buck, Boost, Cuk, Flyback, Forward Converter | Buck, Boost, Cuk, Flyback, Forward Converter |
| Number of Outputs | 1 | 1 |
| Voltage - Input (Min) | 3V | 3V |
| Voltage - Input (Max) | 40V | 40V |
| Current - Output | 1.25A | 1.25A |
| Frequency - Switching | 100kHz | 100kHz |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) |
| Supplier Device Package | 8-PDIP | 8-PDIP |
| Base Product Number | MIC3172 | MIC3172 |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The MIC3172YN is the direct substitute for the MIC3172BN. Both parts are electrically and mechanically identical across all functional parameters, input/output specifications, and package requirements.
The MIC3172YN is classified as Active product status, ensuring ongoing availability and manufacturer support. The MIC3172YN carries ROHS3 compliance certification, whereas the MIC3172BN is RoHS non-compliant. Both parts maintain REACH Unaffected status. Selection of the MIC3172YN is appropriate for new designs, production continuity, and replacement applications where regulatory compliance and supply chain stability are required.
Frequently Asked Questions (FAQ)
Q: Can the MIC3172YN be used as a direct replacement for the MIC3172BN in existing designs?
A: Yes. The MIC3172YN is electrically and mechanically equivalent to the MIC3172BN. Both parts share identical input voltage range (3V–40V), output current (1.25A), switching frequency (100kHz), operating temperature range (-40°C to 85°C), and 8-DIP package configuration. No circuit modifications are required.
Q: What is the primary difference between the MIC3172BN and MIC3172YN?
A: The MIC3172BN is classified as obsolete, while the MIC3172YN is active. The MIC3172YN is ROHS3 compliant, whereas the MIC3172BN is RoHS non-compliant. All electrical and mechanical specifications are identical.
Q: Are there any package or pinout differences between these parts?
A: No. Both the MIC3172BN and MIC3172YN use the 8-DIP (0.300", 7.62mm) through-hole package with identical pinout and supplier device package designation (8-PDIP).
Q: Does the MIC3172YN support the same topologies as the MIC3172BN?
A: Yes. Both parts support Buck, Boost, Cuk, Flyback, and Forward Converter topologies with identical Step-Up, Step-Down, and Step-Up/Step-Down functionality.
Q: What is the inventory status of the MIC3172YN?
A: The MIC3172YN is available as Active product with current inventory in stock. The MIC3172BN, being obsolete, has limited availability.
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