SC34063AP1G Buck-Boost Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The SC34063AP1G is a buck-boost switching regulator IC manufactured by onsemi, designed for positive or negative adjustable output applications. This device integrates a 1.5A switch with dual topology capability (step-up and step-down), operating across a 3V to 40V input range with adjustable output from 1.25V to 40V. The SC34063AP1G is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Direct replacements and functionally compatible alternatives are available from the same manufacturer with improved availability and active product status.

Substiute Parts

SC34063AP1G

onsemiIn Stock: 705SC34063AP1G Datasheet

Current PartRFQ

MC34063AP1G

onsemiIn Stock: 19325MC34063AP1G Datasheet

DirectRFQ

MC33063AP

onsemiIn Stock: 6147MC33063AP Datasheet

SimilarRFQ

MC34063AP

onsemiIn Stock: 31328MC34063AP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the SC34063AP1G is determined by strict alignment of electrical and mechanical parameters. The critical parameters governing substitutability are:

• Input voltage range: 3V to 40V
• Output voltage range: 1.25V to 40V (adjustable)
• Output current: 1.5A (Switch)
• Package type: 8-DIP (0.300", 7.62mm)
• Topology: Buck and Boost capable
• Output configuration: Positive or Negative adjustable

Substitute parts must maintain compatibility across all these parameters. Variations in switching frequency, operating temperature range, or product status do not prevent functional substitution when electrical and mechanical specifications align. The MC34063AP1G represents a direct equivalent with active product status. The MC33063AP and MC34063AP are functionally compatible alternatives with minor parameter variations that remain within acceptable substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

The MC34063AP1G is the primary recommended substitute for the SC34063AP1G. Both devices share identical electrical specifications and package configuration. The MC34063AP1G holds active product status with ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete SC34063AP1G.

The MC33063AP and MC34063AP are functionally compatible alternatives. Both maintain the required input voltage range (3V to 40V), output voltage range (1.24V to 40V), and 1.5A switch current. The MC33063AP extends the operating temperature range to -40°C to 85°C, suitable for applications requiring enhanced thermal performance. The MC34063AP provides variable switching frequency control (100 Hz to 100 kHz), enabling frequency optimization for specific circuit designs.

All substitute parts maintain REACH compliance and EAR99 export classification, ensuring regulatory consistency with the original SC34063AP1G. Selection should prioritize MC34063AP1G for direct replacement applications, with MC33063AP or MC34063AP considered when extended temperature range or frequency flexibility is required.

Frequently Asked Questions (FAQ)

Q: Can MC34063AP1G directly replace SC34063AP1G without circuit modification?

A: Yes. The MC34063AP1G maintains identical electrical specifications, output voltage range (1.25V to 40V), input voltage range (3V to 40V), output current (1.5A), and 8-DIP package configuration. No circuit redesign is required for direct substitution.

Q: What is the difference between SC34063AP1G and MC34063AP1G?

A: The primary difference is product status. SC34063AP1G is obsolete, while MC34063AP1G is active. MC34063AP1G also includes ROHS3 compliance certification. Electrical performance and package specifications are identical.

Q: Are MC33063AP and MC34063AP suitable substitutes?

A: Yes, both are functionally compatible. MC33063AP operates across -40°C to 85°C (versus 0°C to 70°C for SC34063AP1G), providing extended thermal range. MC34063AP offers variable switching frequency (100 Hz to 100 kHz) for circuit optimization. Both maintain the required 1.5A output current and 8-DIP package.

Q: Does switching frequency variation affect substitutability?

A: Switching frequency differences (33kHz, 100kHz, or variable 100 Hz to 100 kHz) do not prevent functional substitution when all other electrical and mechanical parameters align. Frequency selection impacts circuit efficiency and component sizing but does not affect core voltage regulation capability.

Q: What packaging options are available for substitutes?

A: All substitute parts use the 8-DIP (0.300", 7.62mm) through-hole package, maintaining mechanical compatibility with SC34063AP1G designs. MC34063AP1G is supplied in tube packaging; other variants may vary in packaging format but maintain identical physical dimensions.

Q: Are there compliance or regulatory differences between these parts?

A: All parts maintain REACH Unaffected status and EAR99 export classification. MC34063AP1G adds ROHS3 compliance, providing enhanced regulatory alignment for new designs. This does not prevent use of other variants in existing applications.