MCP1710T-18I/LZ Equivalent & Substitute Parts

Part Overview

The MCP1710T-18I/LZ is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output applications with 200mA current capacity in an 8-VDFN (2x2) surface mount package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The device provides regulated 1.8V output from input voltages up to 5.5V with integrated over-current protection and enable control features.

Substiute Parts

MCP1710T-18I/LZ

Microchip TechnologyIn Stock: 819MCP1710T-18I/LZ Datasheet

Current PartRFQ

MCP1700T-1802E/MAY

Microchip TechnologyIn Stock: 3139MCP1700T-1802E/MAY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MCP1710T-18I/LZ is determined by the following critical parameters:

• Fixed output voltage of 1.8V
• Output current capability of 200mA minimum
• Maximum input voltage rating of 5.5V or higher
• Surface mount package with compatible pinout and thermal characteristics
• Positive fixed output configuration
• Over-current protection as minimum protection feature
• Operating temperature range supporting -40°C to 85°C minimum

The MCP1700T-1802E/MAY qualifies as a direct substitute based on these criteria. While it uses a different package format (6-DFN vs. 8-VDFN), it maintains electrical equivalence for the specified application parameters and is available in active production status.

Parameter Comparison

Engineering Selection Recommendations

The MCP1700T-1802E/MAY is the qualified substitute for the obsolete MCP1710T-18I/LZ. Selection is supported by:

• Active production status ensuring long-term availability and supply chain stability
• Identical output voltage and current specifications matching the original design requirements
• Enhanced input voltage rating (6V vs. 5.5V) providing additional design margin
• Improved voltage dropout performance (0.35V vs. 0.45V) reducing thermal dissipation
• Extended operating temperature range (-40°C to 125°C vs. -85°C) supporting broader application environments
• Enhanced protection features including over-temperature and short-circuit protection
• ROHS3 compliance maintained across both parts
• Same manufacturer (Microchip Technology) ensuring design continuity and technical support

Package transition from 8-VDFN to 6-VDFN requires PCB layout modification. Both packages maintain 2x2mm footprint dimensions and exposed pad thermal characteristics, minimizing redesign scope.

Frequently Asked Questions (FAQ)

Q: Can the MCP1700T-1802E/MAY directly replace the MCP1710T-18I/LZ without circuit modifications?

A: Electrical substitution is direct. The output voltage, current rating, and protection features are equivalent. PCB layout modification is required due to package format change from 8-VDFN to 6-VDFN. Pin mapping must be verified against both datasheets before implementation.

Q: What is the impact of the package change from 8-VDFN to 6-VDFN?

A: The 6-VDFN package uses fewer pins but maintains the same 2x2mm footprint and exposed pad thermal design. Pin count reduction reflects simplified control architecture in the MCP1700 series. PCB routing and thermal via placement require adjustment to accommodate the new pinout.

Q: Does the MCP1700T-1802E/MAY support the same enable control feature?

A: The MCP1700T-1802E/MAY does not include enable control features listed in the specification. If enable functionality is required in the application, alternative substitutes must be evaluated or the design must be modified to operate without this feature.

Q: How does the quiescent current difference affect system design?

A: The MCP1700T-1802E/MAY draws 4µA quiescent current compared to 20nA in the original part. For battery-powered or ultra-low-power applications, this 200x increase may impact standby power consumption. System-level power budget analysis is required to determine acceptability.

Q: Are there compliance and certification differences between the two parts?

A: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN/HTSUS classifications. No compliance barriers exist for substitution.