AP1117Y33G-13 Equivalent & Substitute Parts

Part Overview

The AP1117Y33G-13 is a linear voltage regulator IC from Diodes Incorporated designed to deliver a fixed 3.3V output at 1A maximum current. This Surface Mount device in SOT-89-3 package is classified as Obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications. The part operates across an input voltage range up to 18V with a maximum dropout voltage of 1.4V at full load, incorporating over-current and over-temperature protection features.

Substiute Parts

AP1117Y33G-13

Diodes IncorporatedIn Stock: 135504AP1117Y33G-13 Datasheet

Current PartRFQ

AZ1117CR-3.3TRG1

Diodes IncorporatedIn Stock: 18477AZ1117CR-3.3TRG1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1117Y33G-13 is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• 1A output current capability
• SOT-89-3 package compatibility (TO-243AA case)
• Surface Mount mounting type
• Positive fixed output configuration
• Thermal protection and current limiting features

The AZ1117CR-3.3TRG1 qualifies as a direct substitute based on matching output voltage, current rating, package type, and mounting configuration. Both devices are manufactured by Diodes Incorporated and maintain electrical compatibility within their specified operating ranges.

Parameter Comparison

Engineering Selection Recommendations

The AZ1117CR-3.3TRG1 is the recommended substitute for the obsolete AP1117Y33G-13. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part is currently in Active product status with confirmed inventory availability, addressing the obsolescence of the original part.

The AZ1117CR-3.3TRG1 demonstrates improved performance characteristics including lower quiescent current (6 mA versus 10 mA) and higher PSRR (70dB versus 60dB). The maximum input voltage specification of 15V on the substitute is lower than the original 18V rating; circuit designs operating above 15V input require verification of actual operating conditions to confirm compatibility.

The extended operating temperature range of the substitute (-20°C to 125°C versus 0°C to 125°C) provides additional margin for applications requiring lower temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the AZ1117CR-3.3TRG1 directly replace the AP1117Y33G-13 in existing designs?

A: Yes, for applications where the input voltage does not exceed 15V. Both parts share identical output voltage (3.3V), output current (1A), and package configuration (SOT-89-3). Verify your circuit's maximum input voltage specification before substitution.

Q: What is the primary difference between these two parts?

A: The AP1117Y33G-13 is Obsolete while the AZ1117CR-3.3TRG1 is Active. The substitute offers lower quiescent current consumption and improved power supply rejection ratio. The maximum input voltage differs: 18V for the original versus 15V for the substitute.

Q: Are there any thermal or protection feature differences?

A: Both parts include thermal protection. The original specifies Over Current and Over Temperature protection, while the substitute specifies Thermal Shutdown. Both provide adequate protection for standard linear regulator applications.

Q: Does the packaging differ between these parts?

A: No. Both use the TO-243AA case in SOT-89-3 supplier package configuration, ensuring identical PCB footprint and mounting compatibility.

Q: What is the impact of the lower quiescent current in the substitute?

A: The AZ1117CR-3.3TRG1 draws 6 mA quiescent current compared to 10 mA for the original, resulting in reduced standby power consumption and lower heat generation in applications with light load conditions.