AP1515-SL-13 Equivalent & Substitute Parts

Part Overview

The AP1515-SL-13 is a buck switching regulator IC from Diodes Incorporated designed for positive adjustable output applications. This device delivers 1.5A output current with an adjustable output voltage range from 1.23V to 18V, operating from a 4.5V to 22V input supply. The component is packaged in an 8-SOIC surface mount configuration with a switching frequency of 150kHz.

The AP1515-SL-13 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications currently utilizing this regulator.

Substiute Parts

AP1515-SL-13

Diodes IncorporatedIn Stock: 888AP1515-SL-13 Datasheet

Current PartRFQ

AP1509-SG-13

Diodes IncorporatedIn Stock: 2618AP1509-SG-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1515-SL-13 is based on the following critical parameters that must remain compatible:

• Topology: Buck (step-down) switching regulator
• Output Configuration: Positive adjustable output
• Package: 8-SOIC surface mount form factor
• Input Voltage Range: 4.5V to 22V
• Output Voltage Range: 1.23V to 18V minimum capability
• Switching Frequency: 150kHz operation
• Synchronous Rectifier: Non-synchronous design

The AP1509-SG-13 qualifies as a manufacturer-recommended substitute. Both devices share identical input/output voltage specifications, package geometry, switching frequency, and topology. The primary difference is the output current rating: the AP1509-SG-13 provides 2A versus the 1.5A of the original part. This higher current capability makes it a direct functional replacement suitable for the AP1515-SL-13 application space.

Parameter Comparison

Engineering Selection Recommendations

The AP1509-SG-13 is the designated manufacturer substitute for the obsolete AP1515-SL-13. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The AP1509-SG-13 offers superior supply chain availability as an active product with higher inventory levels. The increased output current rating (2A versus 1.5A) provides design margin for existing applications. The improved moisture sensitivity level (MSL 1 versus MSL 3) reduces handling and storage constraints during manufacturing.

The operating temperature range differs: the AP1515-SL-13 operates to 125°C junction temperature, while the AP1509-SG-13 operates to 85°C ambient temperature. Applications requiring the full -40°C to 125°C range must evaluate thermal management and ambient conditions against the AP1509-SG-13 specification.

Frequently Asked Questions (FAQ)

Q: Can the AP1509-SG-13 directly replace the AP1515-SL-13 in existing designs?

A: Yes. Both devices share identical package geometry (8-SOIC), input/output voltage ranges (4.5V–22V input, 1.23V–18V output), and switching frequency (150kHz). The AP1509-SG-13 provides higher output current (2A versus 1.5A), making it functionally compatible. Verify that the application's thermal design and operating temperature requirements align with the AP1509-SG-13 specifications.

Q: What are the key differences between these parts?

A: Output current capacity increases from 1.5A to 2A. Operating temperature range changes from -40°C to 125°C (junction) to -20°C to 85°C (ambient). Moisture sensitivity improves from MSL 3 to MSL 1. Product status transitions from obsolete to active.

Q: Are there any PCB layout considerations when substituting?

A: No layout changes are required. Both parts use the identical 8-SOIC package footprint with 0.154" width and 3.90mm body dimension. Existing PCB designs require no modification.

Q: What is the impact of the higher current rating?

A: The AP1509-SG-13's 2A rating provides additional design margin over the original 1.5A specification. Applications drawing less than 1.5A operate identically. Applications approaching 1.5A benefit from reduced thermal stress and improved reliability margins.

Q: How do the temperature specifications affect selection?

A: The AP1515-SL-13 specifies junction temperature to 125°C; the AP1509-SG-13 specifies ambient temperature to 85°C. For applications operating in high-temperature environments or requiring extended thermal headroom, evaluate the thermal design against the AP1509-SG-13 datasheet thermal resistance parameters.