AP1512-K5L-13 Equivalent & Substitute Parts

Part Overview

The AP1512-K5L-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications with 2A output current capability. The device operates across a 4.5V to 60V input range with adjustable output from 1.23V to 37V, housed in a TO-263-6 D2PAK package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP1512-K5L-13
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Configuration	Positive
Output Type	Adjustable
Voltage - Input (Min)	4.5V
Voltage - Input (Max)	60V
Voltage - Output (Min/Fixed)	1.23V
Voltage - Output (Max)	37V
Current - Output	2A
Frequency - Switching	50kHz
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature	-20°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

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

Package Compatibility: All substitutes must use TO-263-6 D2PAK (5 Leads + Tab) packaging to ensure mechanical and electrical pin compatibility
Output Configuration: Positive adjustable output topology required
Voltage Range Compatibility: Input voltage range must encompass or match the original 4.5V to 60V specification; output adjustable range must support 1.23V minimum
Current Rating: Output current must meet or exceed the 2A requirement
Topology: Buck (step-down) switching regulator topology

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

Category A - Direct Current Match (2A to 3A): Parts with 2A to 3A output current ratings that maintain full voltage range compatibility with the original design.

Category B - Reduced Current (1A): Parts with 1A output current ratings, suitable only for applications where the full 2A capability is not required.

Parameter Comparison

Parameter	AP1512-K5L-13	LM2576WU	LM2576WU-TR	LM2592HVS-ADJ/NOPB	LM2596DSADJG	LM2596DSADJR4G	TL2575-ADJIKTTR	TL2575-ADJIKTTRG3	TL2575HV-ADJIKTTR
Manufacturer	Diodes Inc.	Microchip	Microchip	Texas Instruments	onsemi	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Function	Step-Down	Step-Down	Step-Down	Step-Down	Step-Up, Step-Down, Step-Up/Step-Down	Step-Up, Step-Down, Step-Up/Step-Down	Step-Down	Step-Down	Step-Down
Output Configuration	Positive	Positive	Positive	Positive	Positive or Negative	Positive or Negative	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable
Voltage - Input (Min)	4.5V	4V	4V	4.5V	4.5V	4.5V	4.75V	4.75V	4.75V
Voltage - Input (Max)	60V	40V	40V	60V	40V	40V	40V	40V	60V
Voltage - Output (Min/Fixed)	1.23V	1.23V	1.23V	1.2V	1.23V	1.23V	1.23V	1.23V	1.23V
Voltage - Output (Max)	37V	37V	37V	57V	37V	37V	37V	37V	57V
Current - Output	2A	3A	3A	2A	3A	3A	1A	1A	1A
Frequency - Switching	50kHz	52kHz	52kHz	150kHz	150kHz	150kHz	52kHz	52kHz	52kHz
Operating Temperature	-20°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Package / Case	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK	TO-263-6, D2PAK
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Primary Substitutes (Full Compatibility)

LM2592HVS-ADJ/NOPB (Texas Instruments) is the closest functional equivalent, matching the 2A output current and 4.5V to 60V input voltage range of the original AP1512-K5L-13. Both devices maintain identical output voltage adjustability (1.23V to 37V) and identical TO-263-6 D2PAK packaging. This part is active in production with ROHS3 compliance and is suitable for direct replacement in existing designs.

Secondary Substitutes (Increased Current Capability)

LM2576WU and LM2576WU-TR (Microchip Technology) provide 3A output current, exceeding the original 2A specification. These parts are active and ROHS3 compliant. The input voltage range is reduced to 4V to 40V maximum, which is acceptable for applications not requiring the full 60V input capability of the original design. Both maintain identical output voltage adjustability and TO-263-6 D2PAK packaging.

LM2596DSADJG and LM2596DSADJR4G (onsemi) offer 3A output current with multi-topology capability (buck, boost, buck-boost). Input voltage range is 4.5V to 40V. These parts feature MSL rating of 1 (Unlimited), providing superior moisture handling compared to the original part's MSL-3 rating. Both are active and ROHS3 compliant.

Reduced Current Substitutes (1A Output)

TL2575-ADJIKTTR, TL2575-ADJIKTTRG3, and TL2575HV-ADJIKTTR (Texas Instruments) provide 1A output current. These parts are suitable only for applications where the full 2A capability is not required. TL2575HV-ADJIKTTR maintains the full 4.75V to 60V input voltage range, while standard TL2575 variants are limited to 40V maximum input. All three are active and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can LM2576WU replace AP1512-K5L-13 in all applications?

A: LM2576WU is mechanically and electrically compatible in TO-263-6 D2PAK packaging with identical output voltage adjustability. However, the maximum input voltage is reduced from 60V to 40V. Applications operating above 40V input require LM2592HVS-ADJ/NOPB or TL2575HV-ADJIKTTR instead.

Q: What is the difference between LM2576WU and LM2576WU-TR?

A: Both parts are identical in electrical specifications and package type. The difference is packaging format: LM2576WU is supplied in Tube packaging, while LM2576WU-TR is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q: Why do LM2596DSADJG and LM2596DSADJR4G have MSL-1 rating while the original has MSL-3?

A: MSL-1 (Unlimited) indicates superior moisture resistance compared to MSL-3 (168 Hours). This is a material property difference between manufacturers and represents an improvement for storage and handling in humid environments.

Q: Can I use a 1A part (TL2575 series) as a substitute?

A: TL2575 series parts are mechanically compatible in TO-263-6 D2PAK packaging with identical output voltage adjustability. However, output current is reduced to 1A. Use only in applications where load current does not exceed 1A. For applications requiring the full 2A capability, use LM2592HVS-ADJ/NOPB or LM2576WU.

Q: What is the impact of switching frequency differences?

A: The original AP1512-K5L-13 operates at 50kHz. LM2576WU and TL2575 series operate at 52kHz (negligible difference). LM2592HVS-ADJ/NOPB and LM2596 series operate at 150kHz (higher frequency). Higher switching frequency reduces output filter component size but may require circuit layout optimization for EMI performance.

Q: Are all substitutes ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant, matching the original AP1512-K5L-13 compliance status.

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