MCT1117B-5.0-TP Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MCT1117B-5.0-TP is a linear voltage regulator IC manufactured by Micro Commercial Co, designed to provide a fixed positive 5V output at 1A current capacity. This Surface Mount device operates across an industrial temperature range of -25°C to 125°C and is packaged in SOT-223 (TO-261-4, TO-261AA).

The MCT1117B-5.0-TP is classified as Obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

MCT1117B-5.0-TP

Micro Commercial CoIn Stock: 1055MCT1117B-5.0-TP Datasheet

Current PartRFQ

MCT1117C-5.0-TP

Micro Commercial CoIn Stock: 956MCT1117C-5.0-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MCT1117B-5.0-TP is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Output voltage: 5V fixed (required match)
• Output current capacity: 1A minimum (required match)
• Output configuration: Positive fixed (required match)
• Package type: SOT-223 (required match)
• Mounting type: Surface Mount (required match)

Allowable Parameter Variations:

• Input voltage maximum: The substitute may exceed the original 15V specification, provided the regulator remains functional within the application's input voltage range
• Voltage dropout: Variations are acceptable if the substitute operates within the application's input-to-output voltage differential requirements
• Operating temperature range: The substitute must cover the application's required operating temperature window
• PSRR and quiescent current: Variations are acceptable provided they do not degrade system performance requirements

Identified Substitute: The MCT1117C-5.0-TP meets all critical electrical and mechanical compatibility criteria for substitution of the MCT1117B-5.0-TP.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MCT1117C-5.0-TP

The MCT1117C-5.0-TP is the manufacturer-recommended substitute for the obsolete MCT1117B-5.0-TP. Selection of this substitute is supported by the following factors:

Product Status: The MCT1117C-5.0-TP carries Active product status, ensuring ongoing availability and manufacturing support. The MCT1117B-5.0-TP is Obsolete, making long-term supply continuity uncertain.

Electrical Compatibility: Both devices provide identical 5V fixed positive output at 1A current capacity in the same SOT-223 package. The MCT1117C-5.0-TP accommodates higher input voltage (30V maximum versus 15V maximum), providing greater design flexibility for applications with variable input sources.

Regulatory Compliance: Both parts maintain REACH Unaffected status and EAR99 ECCN classification, ensuring equivalent compliance posture for export and environmental regulations.

Thermal Performance: The MCT1117C-5.0-TP includes Over Temperature protection, providing enhanced reliability compared to the original part. The operating temperature range of -20°C to 125°C covers the majority of industrial applications; verification is required only for applications requiring operation below -20°C.

Packaging and Mounting: Identical SOT-223 package and Surface Mount configuration ensure direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the MCT1117C-5.0-TP directly replace the MCT1117B-5.0-TP on existing PCBs?

A: Yes. Both devices use identical SOT-223 packaging and TO-261-4, TO-261AA case styles. No PCB layout modifications are required for direct substitution.

Q: What is the difference in input voltage rating between these parts?

A: The MCT1117B-5.0-TP specifies 15V maximum input voltage, while the MCT1117C-5.0-TP specifies 30V maximum input voltage. For applications with input sources below 15V, both parts are functionally equivalent. For applications with input sources between 15V and 30V, only the MCT1117C-5.0-TP is suitable.

Q: Are there differences in output current capacity?

A: No. Both the MCT1117B-5.0-TP and MCT1117C-5.0-TP deliver 1A output current at 5V fixed output.

Q: How do the voltage dropout specifications compare?

A: The MCT1117B-5.0-TP specifies 1.3V maximum dropout at 1A, while the MCT1117C-5.0-TP specifies 1.4V maximum dropout at 1A. This 0.1V difference is negligible for most applications. Verification is required only for designs with minimal input-to-output voltage margin.

Q: What is the significance of the Over Temperature protection feature in the MCT1117C-5.0-TP?

A: Over Temperature protection is an additional safety feature in the MCT1117C-5.0-TP that is not specified for the MCT1117B-5.0-TP. This feature enhances device reliability by limiting current or shutting down the regulator if junction temperature exceeds safe operating limits.

Q: Does the operating temperature range difference affect substitution?

A: The MCT1117B-5.0-TP operates from -25°C to 125°C, while the MCT1117C-5.0-TP operates from -20°C to 125°C. For applications requiring operation below -20°C, the MCT1117B-5.0-TP specification is required. For all other applications, the MCT1117C-5.0-TP is suitable.

Q: Are there PSRR (Power Supply Rejection Ratio) differences?

A: The MCT1117B-5.0-TP specifies 75dB at 120Hz, while the MCT1117C-5.0-TP specifies 60dB to 62dB across 120Hz to 1kHz. For applications requiring high PSRR performance, system-level verification is recommended to confirm the MCT1117C-5.0-TP meets noise rejection requirements.

Q: What is the inventory status of these parts?

A: The MCT1117B-5.0-TP (Obsolete) has 989 pieces in stock. The MCT1117C-5.0-TP (Active) has 889 pieces in stock. For new designs and long-term production, the MCT1117C-5.0-TP is the recommended selection due to its Active product status.