AP1530SG-13 Equivalent & Substitute Parts

Part Overview

The AP1530SG-13 is a buck switching regulator IC from Diodes Incorporated, designed for positive adjustable output applications with 3A output current capability. This device operates across a 3.6V to 18V input range and delivers adjustable output from 0.8V to 18V. The part is classified as Obsolete, making identification of suitable equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

AP1530SG-13

Diodes IncorporatedIn Stock: 1862AP1530SG-13 Datasheet

Current PartRFQ

AP1539SDPG-13

Diodes IncorporatedIn Stock: 4262AP1539SDPG-13 Datasheet

DirectRFQ

TPS54331QDRQ1

Texas InstrumentsIn Stock: 19208TPS54331QDRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1530SG-13 is determined by the following critical parameters:

• Package Compatibility: 8-SOIC (0.154", 3.90mm Width) form factor for direct PCB layout compatibility
• Functional Topology: Buck switching regulator with positive adjustable output configuration
• Output Voltage Range: Minimum 0.8V adjustable output capability
• Output Current Rating: Minimum 3A continuous output current
• Input Voltage Range: Support for 3.6V minimum input voltage
• Switching Frequency: Operation at or near 300kHz to maintain circuit performance characteristics

Two substitute parts meet these criteria:

1. AP1539SDPG-13 (Diodes Incorporated): Direct manufacturer alternative with enhanced 4A output current and identical package
2. TPS54331QDRQ1 (Texas Instruments): Cross-manufacturer equivalent with extended specifications and active product status

Parameter Comparison

Engineering Selection Recommendations

AP1539SDPG-13 serves as the direct manufacturer equivalent within the Diodes Incorporated product line. This part maintains identical input/output voltage ranges and switching frequency while providing increased output current capability (4A vs. 3A). The AP1539SDPG-13 is classified as "Not For New Designs," indicating limited long-term availability.

TPS54331QDRQ1 is the recommended long-term substitute. As an active product from Texas Instruments with AEC-Q100 automotive qualification, this part offers extended operating temperature range (-40°C to 125°C), higher maximum input voltage (28V), and higher maximum output voltage (25V). The increased switching frequency (570kHz) may require circuit board layout optimization but provides improved efficiency characteristics. This part is suitable for new design implementations and offers superior long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can AP1539SDPG-13 be used as a direct drop-in replacement for AP1530SG-13?

A: Yes. Both parts share identical package (8-SOIC), input voltage range (3.6V to 18V), output voltage range (0.8V to 18V), and switching frequency (300kHz). The AP1539SDPG-13 provides higher output current (4A vs. 3A), making it functionally compatible for applications requiring 3A or less.

Q: What are the key differences between AP1539SDPG-13 and TPS54331QDRQ1?

A: The primary differences are manufacturer (Diodes vs. Texas Instruments), switching frequency (300kHz vs. 570kHz), maximum input voltage (18V vs. 28V), maximum output voltage (18V vs. 25V), and operating temperature range (-20°C to 85°C vs. -40°C to 125°C). Both maintain the required 8-SOIC package and support 3A minimum output current.

Q: Is the TPS54331QDRQ1 suitable for new designs?

A: Yes. The TPS54331QDRQ1 carries Active product status and AEC-Q100 automotive qualification, making it appropriate for new design implementations with long-term supply assurance.

Q: How does the higher switching frequency of TPS54331QDRQ1 affect circuit design?

A: The 570kHz switching frequency (vs. 300kHz) typically allows for smaller external filter components but may require careful PCB layout to minimize EMI. The part remains functionally compatible with AP1530SG-13 feedback networks and external component selections.

Q: Are all three parts RoHS3 compliant?

A: Yes. AP1530SG-13, AP1539SDPG-13, and TPS54331QDRQ1 are all ROHS3 compliant and REACH unaffected.