MIC2156YML-TR Equivalent & Substitute Parts

Part Overview

The MIC2156YML-TR is a Buck Regulator Positive Output Step-Down DC-DC Controller IC manufactured by Microchip Technology. This component functions as a transistor driver for step-down voltage conversion with dual output phases and integrated synchronous rectification. The part is currently classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity. The MIC2156YML-TR operates across a supply voltage range of 4.5V to 14.5V with a switching frequency of 300kHz and an 80% maximum duty cycle.

Substiute Parts

MIC2156YML-TR

Microchip TechnologyIn Stock: 1063MIC2156YML-TR Datasheet

Current PartRFQ

MIC2155YML-TR

Microchip TechnologyIn Stock: 1971MIC2155YML-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC2156YML-TR is based on strict electrical and mechanical parameter alignment. The following criteria determine valid substitutes:

Critical Matching Parameters:

• Package type: 32-VFQFN Exposed Pad (5x5) surface mount
• Output configuration: Positive output, step-down topology
• Number of outputs and phases: 2 outputs, 2 phases
• Supply voltage range: 4.5V ~ 14.5V
• Control features: Current Limit, Enable, Power Good, Soft Start
• Synchronous rectification and clock sync capability
• Operating temperature range: -40°C ~ 125°C (TJ)
• Manufacturer: Microchip Technology

The MIC2155YML-TR qualifies as a substitute based on identical package, topology, output configuration, supply voltage range, control features, and operating temperature specifications. Variations in switching frequency (500kHz vs. 300kHz) and moisture sensitivity level do not preclude substitution when electrical performance requirements are met.

Parameter Comparison

Engineering Selection Recommendations

The MIC2155YML-TR is the designated manufacturer substitute for the obsolete MIC2156YML-TR. Both components maintain identical electrical specifications across all critical parameters: package geometry, supply voltage range, output configuration, topology, phase count, and control feature set. The MIC2155YML-TR carries active product status from Microchip Technology, ensuring ongoing availability and support.

The primary differences between these parts are switching frequency (500kHz vs. 300kHz) and moisture sensitivity classification. The higher switching frequency of the MIC2155YML-TR may result in reduced output filter component size and improved transient response characteristics. The moisture sensitivity level difference (MSL 2 vs. MSL 3) reflects different storage and handling requirements but does not affect functional compatibility when proper moisture control procedures are implemented.

Both components maintain ROHS3 compliance and identical operating temperature specifications. Selection between these parts should be based on application-specific requirements for switching frequency performance and production environment moisture control capabilities.

Frequently Asked Questions (FAQ)

Q: Can the MIC2155YML-TR directly replace the MIC2156YML-TR in existing designs?

A: Yes. Both components share identical package geometry (32-VFQFN Exposed Pad, 5x5mm), pinout configuration, supply voltage range (4.5V ~ 14.5V), output topology, phase count, and control feature set. PCB layout and schematic modifications are not required for substitution.

Q: What is the impact of the 200kHz switching frequency difference?

A: The MIC2155YML-TR operates at 500kHz compared to the MIC2156YML-TR at 300kHz. Higher switching frequency typically permits use of smaller output filter inductors and capacitors, potentially reducing board space and component cost. System noise characteristics and EMI performance may differ and should be evaluated for specific applications.

Q: Are there moisture sensitivity implications for storage and handling?

A: The MIC2156YML-TR is classified as MSL 2 (1 Year floor life), while the MIC2155YML-TR is MSL 3 (168 Hours floor life). MSL 3 components require more stringent moisture control during storage and require baking before reflow soldering if floor life is exceeded. Proper moisture management procedures must be implemented for the MIC2155YML-TR.

Q: Do both parts maintain the same compliance certifications?

A: Yes. Both the MIC2156YML-TR and MIC2155YML-TR are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Regulatory compliance is maintained across substitution.

Q: Is the MIC2155YML-TR currently available?

A: Yes. The MIC2155YML-TR carries active product status from Microchip Technology with documented inventory availability, whereas the MIC2156YML-TR is obsolete. The MIC2155YML-TR is the recommended path for new designs and production continuity.