AP1122DL-13 Equivalent & Substitute Parts

Part Overview

The AP1122DL-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed for positive fixed output regulation at 1.2V with 1A output current capability. This device operates in the Power Management (PMIC) category and is housed in a TO-252-3 (DPAK) surface mount package. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs while maintaining identical functional specifications.

Substiute Parts

AP1122DL-13

Diodes IncorporatedIn Stock: 1517AP1122DL-13 Datasheet

Current PartRFQ

LD1117ADT12TR

STMicroelectronicsIn Stock: 6673LD1117ADT12TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP1122DL-13 is determined by the following critical parameters:

Fixed Output Voltage: 1.2V output is the primary functional requirement. Substitute parts must maintain identical fixed output voltage specification.

Output Current Rating: 1A continuous output current capability is mandatory for circuit compatibility.

Package Configuration: TO-252-3 (DPAK) surface mount package with 2 leads plus tab ensures mechanical and thermal interface compatibility.

Protection Features: Over Current and Over Temperature protection must be present in substitute devices.

Operating Temperature Range: 0°C to 125°C junction temperature range defines the thermal operating envelope.

Compliance Standards: RoHS3 compliance and REACH unaffected status are required for regulatory equivalence.

Dropout Voltage: Maximum 1.3V @ 1A dropout voltage establishes the minimum input voltage requirement for proper regulation.

Substitute parts meeting all these criteria are electrically and mechanically interchangeable with the AP1122DL-13 in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The LD1117ADT12TR manufactured by STMicroelectronics is a direct substitute for the AP1122DL-13. Both devices maintain Active product status and are fully RoHS3 compliant with REACH unaffected designation, ensuring regulatory equivalence for applications requiring compliance documentation.

The LD1117ADT12TR provides identical electrical performance across all critical parameters: 1.2V fixed output voltage, 1A output current, 1.3V maximum dropout voltage at rated current, and 10 mA quiescent current. Both devices operate across the 0°C to 125°C temperature range with Over Current and Over Temperature protection.

The LD1117ADT12TR features a higher maximum input voltage specification (15V versus 12V), which provides additional design margin in applications with variable input supplies. The PSRR specification of 80dB (120Hz) on the LD1117ADT12TR exceeds the AP1122DL-13 specification of 60dB (120Hz), offering superior power supply rejection characteristics.

Both devices are housed in identical TO-252-3 (DPAK) surface mount packages with matching pinout and thermal characteristics, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the LD1117ADT12TR replace the AP1122DL-13 in existing circuit designs?

A: Yes. The LD1117ADT12TR is a direct electrical and mechanical substitute. Both devices provide 1.2V fixed output at 1A with identical dropout voltage, quiescent current, protection features, and operating temperature range. The TO-252-3 package pinout is identical, allowing direct board-level replacement.

Q: What are the key differences between these two regulators?

A: The primary differences are manufacturer origin and maximum input voltage rating. The LD1117ADT12TR accepts up to 15V input compared to 12V for the AP1122DL-13. The LD1117ADT12TR also provides superior PSRR performance at 80dB versus 60dB. Both differences favor the LD1117ADT12TR for applications requiring higher input voltage tolerance or lower output noise.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the AP1122DL-13 and LD1117ADT12TR are RoHS3 compliant with REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Q: Do these regulators require identical PCB layout considerations?

A: Yes. Both devices use the TO-252-3 (DPAK) package with identical pinout and thermal characteristics. PCB layout, decoupling capacitor placement, and thermal management requirements remain unchanged during substitution.

Q: What is the moisture sensitivity level for both parts?

A: Both devices carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special desiccant or humidity control requirements.

Q: Can the higher input voltage rating of the LD1117ADT12TR affect circuit operation?

A: No. The higher 15V maximum input rating on the LD1117ADT12TR does not affect circuit operation when used in applications designed for the AP1122DL-13. The regulator will function identically within the original design's input voltage range. The higher rating provides additional design margin for applications with variable or higher input supplies.