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MIC38C43BN Equivalent & Substitute Parts
Part Overview
The MIC38C43BN is a multi-topology DC-DC controller IC manufactured by Microchip Technology, designed for buck, boost, flyback, and forward converter applications. This 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 MIC38C43BN is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term product maintenance and production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Category | Power Management (PMIC) |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| Topology | Buck, Boost, Flyback, Forward Converter |
| Function | Step-Up, Step-Down, Step-Up/Step-Down |
| Output Type | Transistor Driver |
| Output Configuration | Positive, Isolation Capable |
| Number of Outputs | 1 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 7.6V ~ 20V |
| Frequency - Switching | 500kHz |
| Duty Cycle (Max) | 96% |
| Synchronous Rectifier | Yes |
| Control Features | Frequency Control |
| Operating Temperature | -40°C ~ 85°C (TA) |
Substitute Part Grouping Explanation
Substitution of the MIC38C43BN is determined by strict equivalence across the following critical parameters:
- Package / Case: 8-DIP (0.300", 7.62mm) form factor
- Mounting Type: Through Hole compatibility
- Topology Support: Buck, Boost, Flyback, Forward Converter
- Function: Step-Up, Step-Down, Step-Up/Step-Down capability
- Output Type: Transistor Driver
- Output Configuration: Positive, Isolation Capable
- Voltage Supply Range: 7.6V ~ 20V
- Switching Frequency: 500kHz
- Duty Cycle (Max): 96%
- Synchronous Rectifier: Yes
- Control Features: Frequency Control
- Operating Temperature Range: -40°C ~ 85°C (TA)
The MIC38C43YN meets all these criteria and is classified as an active product, making it a direct functional equivalent.
Parameter Comparison
| Parameter | MIC38C43BN (Main Part) | MIC38C43YN (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Product Status | Obsolete | Active |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole |
| Topology | 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 Type | Transistor Driver | Transistor Driver |
| Output Configuration | Positive, Isolation Capable | Positive, Isolation Capable |
| Number of Outputs | 1 | 1 |
| Output Phases | 1 | 1 |
| Voltage - Supply (Vcc/Vdd) | 7.6V ~ 20V | 7.6V ~ 20V |
| Frequency - Switching | 500kHz | 500kHz |
| Duty Cycle (Max) | 96% | 96% |
| Synchronous Rectifier | Yes | Yes |
| Control Features | Frequency Control | Frequency Control |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| 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 MIC38C43YN is the direct substitute for the obsolete MIC38C43BN. Both parts share identical electrical specifications, package form factor, and functional capabilities across all topology and control parameters.
The MIC38C43YN offers the additional advantage of ROHS3 compliance, whereas the MIC38C43BN is RoHS non-compliant. For new designs or applications subject to RoHS regulatory requirements, the MIC38C43YN is the appropriate selection. Both parts maintain equivalent moisture sensitivity levels and REACH status.
Frequently Asked Questions (FAQ)
Q: Can the MIC38C43YN directly replace the MIC38C43BN in existing designs?
A: Yes. The MIC38C43YN is electrically and mechanically equivalent to the MIC38C43BN. Both devices support identical topologies, switching frequencies, voltage supply ranges, duty cycle specifications, and operating temperature ranges. The 8-DIP through-hole package is identical, enabling direct PCB-level substitution.
Q: What is the primary difference between these two parts?
A: The MIC38C43BN is classified as obsolete, while the MIC38C43YN is an active product. Additionally, the MIC38C43YN is ROHS3 compliant, whereas the MIC38C43BN is RoHS non-compliant. All electrical and functional parameters remain identical.
Q: Are there any packaging differences between the MIC38C43BN and MIC38C43YN?
A: Both parts use the 8-DIP (0.300", 7.62mm) package with through-hole mounting. The MIC38C43BN is supplied in standard packaging, while the MIC38C43YN is supplied in tube packaging. The physical dimensions and pin configuration are identical.
Q: What topologies does the MIC38C43YN support?
A: The MIC38C43YN supports buck, boost, flyback, and forward converter topologies. It functions as a step-up, step-down, and step-up/step-down DC-DC controller with positive output configuration and isolation capability.
Q: What is the operating temperature range for the MIC38C43YN?
A: The operating temperature range is -40°C to 85°C (TA), identical to the MIC38C43BN.
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