MIC2168BMM Equivalent & Substitute Parts

Part Overview

The MIC2168BMM is a buck regulator positive output step-down DC-DC controller IC manufactured by Microchip Technology. This device functions as a transistor driver for step-down voltage conversion applications with a single output phase. The MIC2168BMM is currently discontinued at DiGi Electronics, making identification of suitable equivalent parts essential for ongoing design support and production continuity.

Substiute Parts

MIC2168BMM

Microchip TechnologyIn Stock: 745MIC2168BMM Datasheet

Current PartRFQ

MIC2169YMM

Microchip TechnologyIn Stock: 25739MIC2169YMM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The MIC2169YMM qualifies as a parametric equivalent to the MIC2168BMM based on the following critical substitution criteria:

Matching Parameters:

• Identical manufacturer (Microchip Technology)
• Identical package and case (10-TFSOP, 10-MSOP)
• Identical mounting type (Surface Mount)
• Identical topology (Buck)
• Identical output type (Transistor Driver)
• Identical function (Step-Down)
• Identical output configuration (Positive)
• Identical number of outputs (1)
• Identical output phases (1)
• Identical supply voltage range (3V ~ 14.5V)
• Identical operating temperature range (-40°C ~ 125°C)
• Identical synchronous rectifier capability (Yes)
• Identical moisture sensitivity level (MSL 1)

Allowable Variations:

• Switching frequency: 1MHz (MIC2168BMM) vs. 500kHz (MIC2169YMM) — both within acceptable controller operating ranges
• Maximum duty cycle: 90% (MIC2168BMM) vs. 92% (MIC2169YMM) — both support standard buck converter applications
• Control features: MIC2168BMM includes Enable feature; MIC2169YMM includes Current Limit — both provide essential control functionality

Parameter Comparison

Engineering Selection Recommendations

The MIC2169YMM is the direct parametric equivalent for the discontinued MIC2168BMM. Selection between these parts should be based on the following factors:

Product Availability: The MIC2169YMM is currently active with 25,700 pieces in stock, whereas the MIC2168BMM is discontinued. For new designs or production continuity, the MIC2169YMM is the appropriate selection.

Regulatory Compliance: The MIC2169YMM is ROHS3 compliant, whereas the MIC2168BMM is RoHS non-compliant. Applications subject to RoHS requirements must use the MIC2169YMM.

Functional Compatibility: Both devices operate within identical supply voltage ranges, temperature ranges, and package specifications. The switching frequency difference (1MHz vs. 500kHz) and duty cycle variation (90% vs. 92%) are within acceptable design tolerances for buck converter applications using these controller ICs.

Frequently Asked Questions (FAQ)

Q: Can the MIC2169YMM directly replace the MIC2168BMM in existing designs?

A: Yes. Both devices share identical package specifications (10-MSOP), mounting type (Surface Mount), supply voltage range (3V ~ 14.5V), operating temperature range (-40°C ~ 125°C), and core buck converter topology. PCB layout compatibility is maintained.

Q: What is the significance of the switching frequency difference between these parts?

A: The MIC2168BMM operates at 1MHz switching frequency while the MIC2169YMM operates at 500kHz. This difference affects output filter component selection and EMI characteristics but does not prevent functional substitution. Design verification of filter performance is necessary for specific applications.

Q: Does the duty cycle variation affect substitution compatibility?

A: The MIC2168BMM supports 90% maximum duty cycle while the MIC2169YMM supports 92% maximum duty cycle. This variation is within standard buck converter design margins and does not prevent substitution for typical applications.

Q: Why is RoHS compliance status different between these parts?

A: The MIC2168BMM is RoHS non-compliant while the MIC2169YMM is ROHS3 compliant. For applications or markets requiring RoHS compliance, the MIC2169YMM is the mandatory selection.

Q: Are there any control feature differences to consider?

A: The MIC2168BMM includes Enable and Current Limit control features. The MIC2169YMM includes Current Limit control. Both devices provide essential control functionality for buck converter applications. Designs utilizing the Enable feature of the MIC2168BMM require circuit modification to accommodate the MIC2169YMM.

Q: What is the inventory status for each part?

A: The MIC2168BMM has 673 pieces available but is discontinued. The MIC2169YMM has 25,700 pieces in stock and is active. For production continuity, the MIC2169YMM is the recommended selection.