SI-8001FDL-TL Buck Switching Regulator Equivalent & Substitute Parts

Part Overview

The SI-8001FDL-TL is a buck switching regulator IC manufactured by Sanken Electric USA Inc., designed for positive adjustable step-down voltage regulation with a 4.6A output current capability. This device is housed in a TO-263-6 (D2PAK) surface mount package with 5 leads plus tab configuration.

The SI-8001FDL-TL is classified as obsolete. Due to its discontinued status and limited remaining inventory, identifying functionally equivalent substitute parts is necessary for ongoing system support, design updates, and long-term supply chain continuity.

Substiute Parts

SI-8001FDL-TL

Sanken Electric USA Inc.In Stock: 1537SI-8001FDL-TL Datasheet

Current PartRFQ

AP1501A-K5G-13

Diodes IncorporatedIn Stock: 10356AP1501A-K5G-13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI-8001FDL-TL are identified based on strict alignment with the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Function: Step-down (buck) topology
• Output Configuration: Positive adjustable voltage regulation
• Input Voltage Range: Minimum 4.5V, Maximum 40V
• Package/Case: TO-263-6, D2PAK (5 Leads + Tab)
• Mounting Type: Surface Mount

Functional Tolerance Parameters:

• Output current capability must meet or exceed 4.6A
• Output voltage adjustability must span the required range
• Operating temperature range must support the application environment

The AP1501A-K5G-13 manufactured by Diodes Incorporated meets these substitution criteria through identical package configuration, overlapping input/output voltage specifications, and superior output current rating (5A vs. 4.6A).

Parameter Comparison

Engineering Selection Recommendations

The AP1501A-K5G-13 serves as a functional substitute for the SI-8001FDL-TL based on the following engineering criteria:

Package and Pinout Compatibility: Both devices utilize identical TO-263-6 (D2PAK) surface mount packaging with 5 leads plus tab, enabling direct PCB layout compatibility without redesign.

Electrical Performance: The AP1501A-K5G-13 provides superior output current capability (5A vs. 4.6A) while maintaining the same input voltage operating range (4.5V to 40V). The adjustable output voltage range of the substitute (1.23V to 37V) encompasses the primary operating window of the original part (0.8V to 24V), with extended upper voltage capability.

Compliance and Status Considerations: The AP1501A-K5G-13 carries ROHS3 compliance certification and REACH unaffected status, supporting modern regulatory requirements. However, both the original and substitute parts carry "Not For New Designs" or "Obsolete" status designations, indicating limited long-term availability. The AP1501A-K5G-13 maintains higher current inventory levels (10,287 pcs vs. 1,511 pcs), providing improved near-term supply security.

Operating Temperature: The substitute operates across -20°C to 85°C, which covers the majority of industrial and commercial applications. Applications requiring the full -30°C lower temperature limit of the original part require evaluation against specific system requirements.

Frequently Asked Questions (FAQ)

Q: Can the AP1501A-K5G-13 directly replace the SI-8001FDL-TL without PCB modifications?

A: Yes. Both devices share identical TO-263-6 (D2PAK) packaging with 5 leads plus tab configuration. Pin-to-pin compatibility enables direct substitution without PCB layout changes.

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

A: The AP1501A-K5G-13 provides higher output current (5A vs. 4.6A) and extended maximum output voltage (37V vs. 24V). The minimum adjustable output voltage differs (1.23V vs. 0.8V). The switching frequency is lower (150kHz vs. 300kHz). These differences must be evaluated against specific circuit design requirements.

Q: Are there compatibility concerns with the minimum output voltage difference?

A: Applications requiring output voltages below 1.23V cannot use the AP1501A-K5G-13 as a direct substitute. Circuit designs operating at or above 1.23V output voltage are compatible.

Q: What is the significance of the operating temperature range difference?

A: The SI-8001FDL-TL supports -30°C to 85°C operation, while the AP1501A-K5G-13 supports -20°C to 85°C. Applications operating below -20°C ambient temperature require the original part or alternative substitutes with extended low-temperature ratings.

Q: How do the switching frequency differences affect circuit design?

A: The SI-8001FDL-TL operates at 300kHz while the AP1501A-K5G-13 operates at 150kHz. Lower switching frequency typically results in larger output filter components and potentially higher output ripple voltage. Input and output capacitor selection must be re-evaluated for the substitute part.

Q: What compliance certifications apply to the substitute part?

A: The AP1501A-K5G-13 is ROHS3 compliant and REACH unaffected. The original SI-8001FDL-TL compliance status is not specified in the provided data.

Q: Why are both parts classified as obsolete or not for new designs?

A: Both the SI-8001FDL-TL (Obsolete) and AP1501A-K5G-13 (Not For New Designs) represent mature product lines with limited manufacturer support. For new system development, evaluation of current-generation buck regulator ICs from active product families is recommended based on specific application requirements.