AP65552SP-13 Equivalent & Substitute Parts

Part Overview

The AP65552SP-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable step-down voltage regulation with a 5A output current capability. This component operates across a 4.5V to 18V input range and delivers adjustable output voltage from 0.76V to 6V, making it suitable for diverse power management applications requiring high current density in compact form factors.

The AP65552SP-13 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this regulator.

Substiute Parts

AP65552SP-13

Diodes IncorporatedIn Stock: 5262AP65552SP-13 Datasheet

Current PartRFQ

TPS54228DR

Texas InstrumentsIn Stock: 2882TPS54228DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP65552SP-13 is evaluated based on the following critical parameters that define functional and mechanical compatibility:

Electrical Compatibility Criteria:

• Input voltage range (minimum 4.5V, maximum 18V)
• Output voltage adjustability (minimum 0.76V, maximum output voltage ≥ 6V)
• Topology (buck/step-down configuration)
• Output configuration (positive adjustable)
• Synchronous rectifier presence
• Operating temperature range (-40°C to 85°C minimum)

Mechanical Compatibility Criteria:

• Package type (8-SOIC with exposed pad)
• Package dimensions (0.154" width, 3.90mm)
• Surface mount mounting type

Regulatory & Compliance Criteria:

• RoHS3 compliance
• Moisture sensitivity level (MSL 1 or better)

The TPS54228DR from Texas Instruments meets the core electrical and mechanical requirements for substitution, though with a reduced output current specification.

Parameter Comparison

Engineering Selection Recommendations

The TPS54228DR is an active product from Texas Instruments and represents a viable substitute for the obsolete AP65552SP-13 in applications where the reduced output current specification (2A versus 5A) is acceptable. Both devices share identical input voltage ranges, adjustable output voltage capability, package form factor, and regulatory compliance status (ROHS3, MSL 1).

The primary design consideration is the current rating differential. Applications requiring the full 5A output current of the AP65552SP-13 cannot be directly substituted with the TPS54228DR without circuit redesign or parallel configuration strategies. For applications operating at or below 2A output current, the TPS54228DR provides equivalent functionality with the advantage of active product status, ensuring long-term availability and technical support from Texas Instruments.

Both devices employ synchronous rectification, operate across the same temperature range, and utilize compatible 8-SOIC packaging, minimizing PCB layout modifications during substitution.

Frequently Asked Questions (FAQ)

Q: Can the TPS54228DR directly replace the AP65552SP-13 in all applications?

A: Direct substitution is possible only in applications where the output current requirement does not exceed 2A. The AP65552SP-13 supports 5A output current, while the TPS54228DR is rated for 2A. Applications requiring higher current must evaluate alternative solutions or circuit modifications.

Q: Are the package dimensions identical between these two parts?

A: Both devices use 8-SOIC packaging with 0.154" (3.90mm) width. The AP65552SP-13 includes an exposed pad, while the TPS54228DR standard package specification lists 8-SOIC without explicit exposed pad notation. PCB layout compatibility should be verified during design transition.

Q: What is the compliance status of both parts?

A: Both the AP65552SP-13 and TPS54228DR are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, meeting equivalent regulatory requirements for industrial and commercial applications.

Q: Why is the AP65552SP-13 obsolete?

A: The AP65552SP-13 is classified as obsolete by Diodes Incorporated. The TPS54228DR from Texas Instruments represents an active alternative for new designs or production continuity planning.

Q: Are there differences in switching frequency between these regulators?

A: The AP65552SP-13 operates at 650 kHz, while the TPS54228DR operates at 700 kHz. This minor frequency difference does not affect functional compatibility but may influence EMI characteristics and component selection in the power stage design.

Q: What output voltage range does each regulator support?

A: Both devices support adjustable output voltage from 0.76V minimum. The AP65552SP-13 supports up to 6V output, while the TPS54228DR extends to 7V maximum output voltage, providing additional headroom for certain applications.