AP1512-12K5L-13 Equivalent & Substitute Parts

Part Overview

The AP1512-12K5L-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 12V output at 2A from input voltages ranging from 4.5V to 60V. This device operates at 50kHz switching frequency and is housed in a TO-263-6 D2PAK package with 5 leads plus tab. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

AP1512-12K5L-13

Diodes IncorporatedIn Stock: 1075AP1512-12K5L-13 Datasheet

Current PartRFQ

LM2575D2T-12R4G

onsemiIn Stock: 1853LM2575D2T-12R4G Datasheet

MFR RecommendedRFQ

LM2575HVS-12/NOPB

Texas InstrumentsIn Stock: 1456LM2575HVS-12/NOPB Datasheet

MFR RecommendedRFQ

LM2576-12WU

Microchip TechnologyIn Stock: 1000468LM2576-12WU Datasheet

MFR RecommendedRFQ

LM2576-12WU-TR

Microchip TechnologyIn Stock: 2539LM2576-12WU-TR Datasheet

MFR RecommendedRFQ

LM2576D2TR4-012G

onsemiIn Stock: 3588LM2576D2TR4-012G Datasheet

MFR RecommendedRFQ

TL2575-12IKTTR

Texas InstrumentsIn Stock: 3027TL2575-12IKTTR Datasheet

MFR RecommendedRFQ

TL2575HV-12IKTTR

Texas InstrumentsIn Stock: 2413TL2575HV-12IKTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1512-12K5L-13 is determined by the following critical parameters:

• Fixed 12V output voltage
• TO-263-6 D2PAK package compatibility
• Buck topology with positive output configuration
• Active product status (preferred for long-term availability)
• ROHS3 compliance and EAR99 export classification

The substitute parts are grouped into two categories based on output current capability:

Category 1: 1A Output Current — LM2575D2T-12R4G, LM2575HVS-12/NOPB, TL2575-12IKTTR, TL2575HV-12IKTTR. These parts provide reduced output current compared to the original 2A specification but maintain full electrical and mechanical compatibility.

Category 2: 3A Output Current — LM2576-12WU, LM2576-12WU-TR, LM2576D2TR4-012G. These parts exceed the original 2A output current specification, offering higher current capability within the same package footprint.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and EAR99 export classification, ensuring regulatory alignment and long-term supply availability compared to the obsolete AP1512-12K5L-13.

For applications requiring output current at or below 2A: Select from the 1A-rated substitutes (LM2575D2T-12R4G, LM2575HVS-12/NOPB, TL2575-12IKTTR, TL2575HV-12IKTTR). These parts operate within conservative current margins and provide extended operating temperature ranges (-40°C to 125°C) compared to the original part. LM2575HVS-12/NOPB and TL2575HV-12IKTTR support the full 60V input range matching the original specification.

For applications requiring output current above 2A: Select from the 3A-rated substitutes (LM2576-12WU, LM2576-12WU-TR, LM2576D2TR4-012G). These parts provide current headroom for transient conditions and thermal margin. LM2576D2TR4-012G offers MSL-1 rating (unlimited moisture sensitivity) for extended shelf life.

Input voltage range consideration: LM2576D2TR4-012G specifies a 7V minimum input voltage, which is higher than other substitutes. Applications requiring operation below 7V should select alternatives with 4V or 4.75V minimum input specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 1A-rated substitute in place of the 2A AP1512-12K5L-13?

A: Yes, provided your application's actual output current demand does not exceed 1A. The 1A-rated substitutes (LM2575 and TL2575 series) are electrically and mechanically compatible. Operating at or below the rated current ensures proper thermal performance and reliability.

Q: Can I use a 3A-rated substitute in place of the 2A AP1512-12K5L-13?

A: Yes. The 3A-rated substitutes (LM2576 series) are pin-compatible and functionally equivalent. Higher current rating provides additional thermal margin and transient headroom without affecting normal operation at 2A output current.

Q: Are all substitutes pin-compatible with the AP1512-12K5L-13?

A: Yes. All listed substitutes use the TO-263-6 D2PAK package with identical pinout and lead configuration. PCB layout modifications are not required for mechanical or electrical compatibility.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (LM2575HVS-12/NOPB, LM2576-12WU) is suitable for manual assembly and lower-volume production. Tape & Reel packaging (LM2576-12WU-TR, LM2576D2TR4-012G, TL2575-12IKTTR, TL2575HV-12IKTTR) is optimized for automated pick-and-place assembly. Electrical performance is identical; selection depends on assembly process requirements.

Q: Does the 2kHz difference in switching frequency (50kHz vs. 52kHz) affect circuit design?

A: No. The 2kHz difference is negligible for output filter design. Existing filter component values remain valid. Both frequencies fall within the same design envelope for EMI filtering and output ripple specifications.

Q: Which substitute offers the best long-term availability?

A: All listed substitutes are active products from established manufacturers (onsemi, Texas Instruments, Microchip). Active status ensures continued production and supply chain availability. LM2576D2TR4-012G offers MSL-1 rating for extended shelf life without moisture bake-out requirements.

Q: Can I mix different substitute part numbers in the same production run?

A: Yes, provided all parts meet your application's electrical requirements (output current, input voltage range, operating temperature). Mixing 1A and 3A variants is acceptable if your circuit design accommodates the lower current rating of 1A parts. Verify thermal performance for each variant under your specific load conditions.