AP1512A-T5L-U Equivalent & Substitute Parts

Part Overview

The AP1512A-T5L-U is a buck switching regulator IC manufactured by Diodes Incorporated, designed for step-down voltage conversion with positive adjustable output. This device operates as a single-output regulator with 3A output current capability and is housed in a TO-220-5 package for through-hole mounting applications.

The AP1512A-T5L-U is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this regulator is specified.

Substiute Parts

AP1512A-T5L-U

Diodes IncorporatedIn Stock: 1180AP1512A-T5L-U Datasheet

Current PartRFQ

LM2576WT

Microchip TechnologyIn Stock: 5961LM2576WT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1512A-T5L-U is determined by the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive adjustable output
• Output Current Rating: 3A minimum
• Package & Mounting: TO-220-5 through-hole package
• Output Voltage Adjustability: 1.23V minimum reference voltage with adjustable output range
• Input Voltage Compatibility: Minimum 4.5V input support
• Regulatory Compliance: ROHS3 compliance and EAR99 classification

The LM2576WT from Microchip Technology meets all substitution criteria. Both devices share identical functional topology, output current capability, package configuration, and regulatory compliance status. The LM2576WT maintains full electrical and mechanical compatibility for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The LM2576WT is the qualified substitute for the AP1512A-T5L-U based on the following engineering criteria:

Functional Equivalence: Both devices implement identical buck regulator topology with 3A output current, positive adjustable output configuration, and TO-220-5 package. Electrical performance parameters including output voltage range (1.23V to 37V) and switching frequency (50kHz to 52kHz) are equivalent within normal design tolerances.

Regulatory & Compliance Status: Both parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Moisture sensitivity level is identical at MSL 1 (unlimited).

Product Availability: The LM2576WT carries active product status with established supply chain availability, whereas the AP1512A-T5L-U is obsolete. Selection of the LM2576WT ensures long-term component sourcing capability and design sustainability.

Operating Temperature Consideration: The LM2576WT provides extended operating temperature range (-40°C to 125°C junction temperature) compared to the AP1512A-T5L-U (-20°C to 85°C ambient temperature), offering improved thermal performance margin for demanding applications.

Input Voltage Range: Applications requiring the full 60V maximum input of the AP1512A-T5L-U should note that the LM2576WT is rated to 40V maximum input. Design verification is required if input voltages exceed 40V.

Frequently Asked Questions (FAQ)

Q: Can the LM2576WT directly replace the AP1512A-T5L-U without PCB modifications?

A: Yes. Both devices share identical TO-220-5 package pinout and through-hole mounting configuration. Direct socket substitution is possible without PCB layout changes.

Q: What are the key electrical differences between these devices?

A: The primary differences are input voltage maximum rating (AP1512A-T5L-U: 60V vs. LM2576WT: 40V) and switching frequency (AP1512A-T5L-U: 50kHz vs. LM2576WT: 52kHz). Output current, voltage range, and adjustability are identical.

Q: Is the LM2576WT suitable for applications originally designed for 60V input?

A: No. If the original design requires input voltages above 40V, the LM2576WT is not suitable. Alternative regulators with higher input voltage ratings must be evaluated.

Q: Are there any thermal performance differences?

A: The LM2576WT operates over a wider temperature range (-40°C to 125°C junction) compared to the AP1512A-T5L-U (-20°C to 85°C ambient). This provides additional thermal margin but does not indicate superior thermal dissipation characteristics. Thermal design should be verified for the specific application.

Q: Do both devices require identical external component values?

A: Yes. The adjustable output voltage is set by external resistor dividers, and the feedback reference voltage is 1.23V for both devices. External component selection follows the same design methodology.

Q: What is the significance of the obsolete status of the AP1512A-T5L-U?

A: Obsolete status indicates the manufacturer has discontinued production. The LM2576WT, with active product status, ensures continued availability and manufacturing support for new designs and production requirements.

Q: Are both devices RoHS compliant?

A: Yes. Both the AP1512A-T5L-U and LM2576WT are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating.