KA34063ADSTF Equivalent & Substitute Parts

Part Overview

The KA34063ADSTF is a buck-boost switching regulator IC manufactured by onsemi, designed for positive or negative adjustable output applications with 1.5A switch current capability. This component operates across a 3V to 40V input range and supports both step-up and step-down topologies in a compact 8-SOIC surface mount package.

The KA34063ADSTF is classified as obsolete. Equivalent and substitute parts from active product lines provide direct functional replacement while maintaining electrical and mechanical compatibility.

Substiute Parts

KA34063ADSTF

onsemiIn Stock: 8545KA34063ADSTF Datasheet

Current PartRFQ

MC34063ACD-TR

STMicroelectronicsIn Stock: 80165MC34063ACD-TR Datasheet

DirectRFQ

MC34063ECD-TR

STMicroelectronicsIn Stock: 10307MC34063ECD-TR Datasheet

DirectRFQ

MC34063ABD-TR

STMicroelectronicsIn Stock: 55320MC34063ABD-TR Datasheet

UpgradeRFQ

MC34063EBD-TR

STMicroelectronicsIn Stock: 43254MC34063EBD-TR Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KA34063ADSTF is determined by the following critical parameters:

Electrical Compatibility:

• Input voltage range: 3V to 40V
• Output current: 1.5A (Switch)
• Output configuration: Positive or Negative adjustable
• Topology: Buck and Boost capable
• Package: 8-SOIC (0.154", 3.90mm Width)

Mechanical Compatibility:

• Surface mount package with identical pinout and footprint
• Moisture sensitivity level MSL 1

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring direct functional replacement in existing circuit designs. Substitute parts are sourced from STMicroelectronics under the MC34063 base product number, which shares the same functional architecture and pin configuration as the KA34063ADSTF.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (MC34063ACD-TR, MC34063ECD-TR): These parts maintain the original operating temperature range of 0°C to 70°C and are sourced from STMicroelectronics as active products. Both are ROHS3 compliant and available in high inventory quantities. MC34063ACD-TR is packaged in Cut Tape (CT) & Digi-Reel format with 80,100 units in stock. MC34063ECD-TR is similarly packaged with 10,200 units available.

Extended Temperature Substitutes (MC34063ABD-TR, MC34063EBD-TR): These variants extend the operating temperature range beyond the original specification. MC34063ABD-TR operates from -40°C to 85°C and is available in Cut Tape (CT) packaging with 55,300 units in stock. MC34063EBD-TR extends operation to -40°C to 125°C and is packaged in Cut Tape (CT) & Digi-Reel format with 43,196 units available. Both are ROHS3 compliant active products suitable for applications requiring wider temperature performance.

All substitute parts share identical electrical specifications for input voltage range (3V to 40V), output current (1.5A switch), package footprint (8-SOIC), and regulatory compliance (REACH Unaffected, EAR99 classification).

Frequently Asked Questions (FAQ)

Q: Can MC34063 series parts directly replace the KA34063ADSTF? A: Yes. The MC34063 series from STMicroelectronics shares the same functional architecture, pin configuration, and 8-SOIC package footprint. All electrical parameters for input voltage, output current, and topology match the KA34063ADSTF requirements.

Q: What is the difference between MC34063ACD-TR and MC34063ABD-TR? A: The primary difference is operating temperature range. MC34063ACD-TR operates from 0°C to 70°C, matching the original KA34063ADSTF specification. MC34063ABD-TR extends operation to -40°C to 85°C, providing wider temperature performance for demanding applications. Both maintain identical electrical specifications and 8-SOIC packaging.

Q: Why do substitute parts specify 33kHz switching frequency while the KA34063ADSTF lists 100Hz to 100kHz? A: The KA34063ADSTF specifies a frequency range, while the MC34063 substitutes operate at a fixed 33kHz switching frequency. This fixed frequency falls within the allowable range and is standard for the MC34063 architecture. Circuit design must account for this fixed frequency characteristic.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All MC34063 series substitutes (MC34063ACD-TR, MC34063ECD-TR, MC34063ABD-TR, MC34063EBD-TR) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What packaging options are available for MC34063 substitutes? A: MC34063ACD-TR and MC34063ECD-TR are supplied in Cut Tape (CT) & Digi-Reel format. MC34063ABD-TR is supplied in Cut Tape (CT) format. MC34063EBD-TR is supplied in Cut Tape (CT) & Digi-Reel format. All use the same 8-SOIC (0.154", 3.90mm Width) package with identical pinout and footprint compatibility.

Q: Which substitute part should be selected for standard applications? A: MC34063ACD-TR or MC34063ECD-TR are appropriate for applications operating within the 0°C to 70°C temperature range. Both are active products with high inventory availability and ROHS3 compliance. For applications requiring extended temperature performance, MC34063ABD-TR (-40°C to 85°C) or MC34063EBD-TR (-40°C to 125°C) are suitable alternatives.