AP1520SL-13 Equivalent & Substitute Parts

Part Overview

The AP1520SL-13 is a buck switching regulator IC from Diodes Incorporated designed for positive adjustable output applications. It delivers 2A output current with an adjustable output voltage range from 0.8V to 23V, operating from a 4V to 23V input supply. The device is housed in an 8-SOIC package and operates at a 300kHz switching frequency.

This part is discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

AP1520SL-13

Diodes IncorporatedIn Stock: 3535AP1520SL-13 Datasheet

Current PartRFQ

TPS54233DR

Texas InstrumentsIn Stock: 35411TPS54233DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1520SL-13 is determined by the following critical electrical and mechanical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive adjustable output
• Output Voltage Range: Minimum 0.8V, maximum at least 23V
• Output Current: 2A minimum
• Input Voltage Range: Minimum 4V, maximum at least 23V
• Switching Frequency: 300kHz nominal
• Package: 8-SOIC (0.154", 3.90mm Width) for mechanical and thermal compatibility
• Synchronous Rectifier: No (asynchronous topology)
• Number of Outputs: Single output configuration

The TPS54233DR from Texas Instruments meets all substitution criteria within the allowed parameter ranges for this product category.

Parameter Comparison

Engineering Selection Recommendations

The TPS54233DR is a direct functional substitute for the AP1520SL-13 based on electrical and mechanical parameter alignment. Both devices are ROHS3 compliant and share identical package geometry, output current rating, switching frequency, and adjustable output voltage configuration.

The TPS54233DR offers extended operating ranges compared to the AP1520SL-13: input voltage extends from 4.6V to 28V (versus 4V to 23V), output voltage extends to 25V (versus 23V), and junction temperature range extends to -40°C to 150°C (versus -25°C to 85°C). These extended ranges provide additional design margin in applications where the AP1520SL-13 was previously specified.

The TPS54233DR is currently in active production status with substantial inventory availability, making it suitable for new designs and replacement applications where the AP1520SL-13 is no longer obtainable.

Frequently Asked Questions (FAQ)

Q: Can the TPS54233DR be used as a direct replacement for the AP1520SL-13 in existing designs?

A: Yes. Both devices share identical package geometry (8-SOIC), output current rating (2A), switching frequency (300kHz), and adjustable output voltage configuration (0.8V to 23V minimum). Pin-to-pin compatibility and functional equivalence are established. Design validation should confirm that the extended operating ranges of the TPS54233DR do not introduce unintended behavior in the application circuit.

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

A: The primary differences are manufacturer (Diodes Incorporated versus Texas Instruments), product status (discontinued versus active), and operating ranges. The TPS54233DR extends the input voltage range to 4.6V minimum and 28V maximum, output voltage to 25V maximum, and junction temperature to -40°C to 150°C. The AP1520SL-13 is limited to 4V to 23V input, 0.8V to 23V output, and -25°C to 85°C operating temperature.

Q: Are there any package or thermal considerations when substituting?

A: Both parts use the 8-SOIC (0.154", 3.90mm Width) package. Thermal performance depends on PCB layout, copper area, and thermal vias. Consult the respective datasheets for thermal resistance specifications and layout recommendations specific to each manufacturer's design.

Q: What compliance certifications apply to both parts?

A: Both the AP1520SL-13 and TPS54233DR are ROHS3 compliant and REACH unaffected. Both carry ECCN classification EAR99 and HTSUS code 8542.39.0001.