AP78L05YG-13 Equivalent & Substitute Parts

Part Overview

The AP78L05YG-13 is a linear voltage regulator IC from Diodes Incorporated, delivering a fixed positive 5V output at 100mA in a SOT-89-3 surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The part operates across an input voltage range up to 20V with integrated over-temperature and short-circuit protection, suitable for low-power voltage regulation applications requiring fixed 5V output.

Substiute Parts

AP78L05YG-13

Diodes IncorporatedIn Stock: 15500AP78L05YG-13 Datasheet

Current PartRFQ

AS78L05RTR-G1

Diodes IncorporatedIn Stock: 30308AS78L05RTR-G1 Datasheet

MFR RecommendedRFQ

L78L05ABUTR

MAXVISIONIn Stock: 447708L78L05ABUTR Datasheet

MFR RecommendedRFQ

L78L05ACUTR

STMicroelectronicsIn Stock: 160407L78L05ACUTR Datasheet

MFR RecommendedRFQ

UA78L05ACPKE6

Texas InstrumentsIn Stock: 2214UA78L05ACPKE6 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Fixed output voltage of 5V
• Output current capability of 100mA minimum
• SOT-89-3 package (TO-243AA case)
• Surface mount configuration
• Positive output configuration
• Single regulator output
• Over-temperature and short-circuit protection

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in input voltage rating, quiescent current, dropout voltage, and operating temperature range are secondary parameters that do not prevent functional substitution when the primary criteria are met.

Parameter Comparison

Engineering Selection Recommendations

AS78L05RTR-G1 (Diodes Incorporated) is the primary recommended substitute. It maintains manufacturer continuity with the original part, offers extended input voltage tolerance (30V vs 20V), and is in active production status with robust inventory availability. This part is ROHS3 compliant and provides identical PSRR performance.

L78L05ACUTR (STMicroelectronics) is a secondary option for designs requiring active production status and extended operating temperature range (0°C ~ 125°C). It is ROHS3 compliant with high inventory availability and provides equivalent electrical performance.

L78L05ABUTR (MAXVISION) offers the highest inventory stock and extended operating temperature range (-40°C ~ 125°C). This part is suitable for applications requiring maximum temperature margin, though ROHS compliance status is not specified in available documentation.

UA78L05ACPKE6 (Texas Instruments) is designated as Last Time Buy, indicating limited future availability. This part maintains the original 20V input voltage specification and is ROHS3 compliant but should be considered only when manufacturer preference or existing qualification requires Texas Instruments sourcing.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AP78L05YG-13 with any of these substitute parts?

A: Yes, all listed parts are direct functional replacements. They share identical output voltage (5V), output current (100mA), package (SOT-89-3), and protection features. Pin-to-pin compatibility is maintained across all substitutes.

Q: What is the difference between the substitute parts?

A: Primary differences include manufacturer, product status (active vs obsolete vs last time buy), input voltage rating (20V vs 30V), operating temperature range, and quiescent current specifications. All maintain the core 5V/100mA output specification.

Q: Why is AS78L05RTR-G1 recommended as the primary substitute?

A: AS78L05RTR-G1 maintains Diodes Incorporated as the original manufacturer, is in active production status ensuring long-term availability, offers improved input voltage tolerance (30V), and provides identical PSRR performance (62dB). This minimizes design risk and supply chain disruption.

Q: Are there temperature range limitations I should consider?

A: The original AP78L05YG-13 operates from -20°C to 85°C. Substitute parts offer extended ranges: AS78L05RTR-G1 and L78L05ABUTR extend to -40°C ~ 125°C, while L78L05ACUTR and UA78L05ACPKE6 operate from 0°C ~ 125°C. Select based on your application's thermal requirements.

Q: Is the SOT-89-3 package consistent across all parts?

A: Yes, all substitute parts use the SOT-89-3 package (TO-243AA case) with identical pin configuration and surface mount characteristics. PCB layout and footprint remain unchanged.

Q: What is the significance of product status (Active, Last Time Buy, Obsolete)?

A: Active status indicates ongoing production and long-term availability. Last Time Buy indicates limited future supply. Obsolete status means no further production. For new designs, prioritize Active status parts to ensure supply continuity beyond the Last Time Buy window.

Q: Do all parts meet RoHS3 compliance?

A: AS78L05RTR-G1, L78L05ACUTR, and UA78L05ACPKE6 are confirmed ROHS3 compliant. L78L05ABUTR compliance status is not specified in available documentation. Verify with the supplier if RoHS3 certification is a design requirement.