AP65251WU-7 Equivalent & Substitute Parts

Part Overview

The AP65251WU-7 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable step-down voltage regulation with a 2A output current capability. The device operates from a 4.5V to 16V input range and provides adjustable output voltage from 0.6V to 6V, making it suitable for various power management applications requiring compact form factors.

This part is classified as Obsolete. Identifying equivalent and substitute components is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this regulator.

Substiute Parts

AP65251WU-7

Diodes IncorporatedIn Stock: 662AP65251WU-7 Datasheet

Current PartRFQ

TPS565201DDCR

Texas InstrumentsIn Stock: 19329TPS565201DDCR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the AP65251WU-7 are identified based on the following critical parameters that determine functional compatibility:

• Package Compatibility: SOT-23-6 Thin (TSOT-23-6) form factor for direct PCB layout compatibility
• Topology & Function: Buck switching regulator with positive adjustable output configuration
• Input Voltage Range: Minimum 4.5V input support with maximum input voltage of 16V or greater
• Output Voltage Range: Adjustable output from 0.6V minimum with maximum output of 6V or greater
• Switching Frequency: 500kHz operation for consistent timing and filtering characteristics
• Synchronous Rectification: Integrated synchronous rectifier for efficiency
• Regulatory Compliance: ROHS3 compliance and EAR99 classification

The substitute part TPS565201DDCR meets all these criteria while offering enhanced specifications in output current capacity and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The TPS565201DDCR is a direct functional substitute for the AP65251WU-7 based on matching package geometry, topology, and core electrical specifications. Both devices are ROHS3 compliant and classified under EAR99 export control.

The substitute part offers enhanced specifications: increased output current capacity (5A versus 2A), extended maximum input voltage (17V versus 16V), higher maximum output voltage (7V versus 6V), and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). These enhancements provide superior performance margins without compromising compatibility with existing PCB designs.

The TPS565201DDCR maintains Active product status, ensuring long-term availability and continued manufacturer support, whereas the AP65251WU-7 is Obsolete. Selection of the substitute part eliminates supply chain risk associated with discontinued components.

Frequently Asked Questions (FAQ)

Q: Can the TPS565201DDCR be used as a direct replacement for the AP65251WU-7 on existing PCBs?

A: Yes. Both devices use identical SOT-23-6 Thin (TSOT-23-6) packaging with the same pinout and footprint. No PCB layout modifications are required for physical substitution.

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

A: The TPS565201DDCR provides higher output current capacity (5A versus 2A), extended input voltage range (17V maximum versus 16V), higher output voltage ceiling (7V versus 6V), and wider operating temperature range (-40°C to 125°C versus -40°C to 85°C). These represent performance enhancements rather than incompatibilities.

Q: Are there any design considerations when switching from AP65251WU-7 to TPS565201DDCR?

A: Both devices operate at identical 500kHz switching frequency with matching input and output voltage adjustment ranges at the lower end (4.5V input minimum, 0.6V output minimum). Existing feedback networks and external component selections remain valid. The higher current rating of the substitute allows for reduced thermal stress in applications approaching the 2A limit.

Q: What is the compliance status of the substitute part?

A: The TPS565201DDCR is ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes, matching the regulatory profile of the original AP65251WU-7.

Q: Why is the AP65251WU-7 classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The TPS565201DDCR, with Active status, represents the current market solution for this functional category and ensures ongoing availability and manufacturer technical support.