AP7361-18ER-13 Equivalent & Substitute Parts

Part Overview

The AP7361-18ER-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, delivering a fixed 1.8V output at 1A maximum current in a SOT-223R surface mount package. This device is classified as a Power Management PMIC with active product status and full RoHS3 compliance. The regulator is designed for applications requiring stable 1.8V rails with integrated protection against overcurrent, overtemperature, and short circuit conditions. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges.

Substiute Parts

AP7361-18ER-13

Diodes IncorporatedIn Stock: 15222AP7361-18ER-13 Datasheet

Current PartRFQ

MCP1824ST-1802E/DB

Microchip TechnologyIn Stock: 3396MCP1824ST-1802E/DB Datasheet

MFR RecommendedRFQ

MIC37100-1.8WS

Microchip TechnologyIn Stock: 3787MIC37100-1.8WS Datasheet

MFR RecommendedRFQ

MIC37100-1.8WS-TR

Microchip TechnologyIn Stock: 1280MIC37100-1.8WS-TR Datasheet

MFR RecommendedRFQ

TC1264-1.8VDBTR

Microchip TechnologyIn Stock: 3352TC1264-1.8VDBTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP7361-18ER-13 are qualified based on the following criteria:

Critical Matching Parameters:

• Fixed output voltage of 1.8V
• Surface mount package compatibility (SOT-223 family)
• Positive output configuration
• Maximum input voltage of 6V or greater
• RoHS3 compliance
• Active product status

Allowable Variations:

• Output current capacity: Substitutes must support minimum 1A or be suitable for reduced-current applications
• Dropout voltage: Variations permitted based on application requirements
• Quiescent current: Acceptable within power budget constraints
• Operating temperature range: Extended ranges acceptable
• Protection feature sets: Variations in specific protection types permitted if core protections present

Three substitute parts meet these criteria with different output current ratings and packaging options.

Parameter Comparison

Engineering Selection Recommendations

MIC37100-1.8WS and MIC37100-1.8WS-TR (Microchip Technology)

These parts provide direct electrical equivalence to the AP7361-18ER-13 with 1A output current capability and identical 1.8V fixed output. Both devices feature improved dropout voltage performance (0.5V @ 1A versus 0.7V @ 1A) and extended operating temperature range to 125°C. The MIC37100-1.8WS-TR variant is packaged in Tape & Reel format matching the original part's supply format. Both are RoHS3 compliant and maintain active product status. Selection between these two depends on packaging requirements: MIC37100-1.8WS-TR for automated assembly processes, MIC37100-1.8WS for manual or tube-based handling.

MCP1824ST-1802E/DB (Microchip Technology)

This substitute provides reduced output current capacity at 300mA, suitable only for applications where load current does not exceed this rating. The device offers superior dropout voltage performance (0.32V @ 300mA) and extended temperature range to 125°C. Protection features include Over Temperature, Short Circuit, and Under Voltage Lockout. RoHS3 compliance and active product status are maintained. This part is appropriate for lower-power 1.8V rail applications.

TC1264-1.8VDBTR (Microchip Technology)

This substitute provides intermediate output current capacity at 800mA, positioned between the MCP1824 and full 1A equivalents. Dropout voltage is higher at 1.4V @ 800mA, requiring consideration in low-input-voltage applications. The device includes Over Current and Over Temperature protection with extended operating temperature range to 125°C. RoHS3 compliance and active product status are confirmed. This part suits applications requiring 800mA capability with acceptable dropout voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can MIC37100-1.8WS-TR be used as a direct replacement for AP7361-18ER-13?

A: Yes. Both devices deliver 1.8V fixed output at 1A maximum current in SOT-223 packages. The MIC37100-1.8WS-TR features improved dropout voltage (0.5V versus 0.7V @ 1A) and extended temperature range (-40°C to 125°C versus -40°C to 85°C). Tape & Reel packaging matches the original supply format. Both are RoHS3 compliant with active product status.

Q: What is the key difference between MIC37100-1.8WS and MIC37100-1.8WS-TR?

A: Both parts are electrically identical with 1A output current and 1.8V fixed output. The primary difference is packaging format: MIC37100-1.8WS is supplied in Tube format, while MIC37100-1.8WS-TR is supplied in Tape & Reel format. Selection depends on assembly process requirements and inventory handling procedures.

Q: Can MCP1824ST-1802E/DB replace AP7361-18ER-13 in all applications?

A: No. The MCP1824ST-1802E/DB is limited to 300mA maximum output current, compared to 1A for the AP7361-18ER-13. This substitute is suitable only for applications where load current does not exceed 300mA. Verify load requirements before selection.

Q: How does dropout voltage affect part selection?

A: Dropout voltage determines the minimum input voltage required to maintain regulated output. The AP7361-18ER-13 requires 2.5V minimum input (1.8V output + 0.7V dropout @ 1A). MIC37100 variants require 2.3V minimum (1.8V + 0.5V @ 1A), and TC1264-1.8VDBTR requires 3.2V minimum (1.8V + 1.4V @ 800mA). Select based on available input voltage range.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts—MIC37100-1.8WS, MIC37100-1.8WS-TR, MCP1824ST-1802E/DB, and TC1264-1.8VDBTR—are RoHS3 compliant with active product status, matching the compliance profile of the AP7361-18ER-13.

Q: What protection features are included in each substitute?

A: MIC37100 variants include Over Current and Over Temperature protection. MCP1824ST-1802E/DB includes Over Temperature, Short Circuit, and Under Voltage Lockout protection. TC1264-1.8VDBTR includes Over Current and Over Temperature protection. The AP7361-18ER-13 includes Over Current, Over Temperature, and Short Circuit protection.

Q: Can these parts be used interchangeably in existing PCB designs?

A: All substitute parts use SOT-223 package variants (SOT-223-3 or SOT-223R) with compatible TO-261-4 and TO-261AA case dimensions. PCB footprints designed for SOT-223 packages will accommodate these substitutes. Verify pin configuration and lead spacing match your specific PCB layout before assembly.