RT34063AGN Equivalent & Substitute Parts

Part Overview

The RT34063AGN is a buck-boost switching regulator IC manufactured by Richtek USA Inc., designed for positive or negative adjustable output applications. This device integrates step-up and step-down topology in a single 8-DIP package, delivering 1.5A output current with adjustable voltage regulation from 1.25V to 30V. The RT34063AGN is classified as obsolete, making identification of functionally equivalent active alternatives essential for new designs and production continuity.

Substiute Parts

RT34063AGN

Richtek USA Inc.In Stock: 1168RT34063AGN Datasheet

Current PartRFQ

MC33063ADR

Texas InstrumentsIn Stock: 97370MC33063ADR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT34063AGN is determined by the following critical electrical and mechanical parameters:

• Topology & Function: Buck-boost switching regulator with step-up and step-down capability
• Output Configuration: Positive or negative adjustable output
• Voltage Range: Input 3V minimum to 30V maximum; output adjustable from 1.25V to 30V
• Current Rating: 1.5A output current capability
• Number of Outputs: Single output
• Operating Temperature: -40°C to 85°C
• Package Compatibility: Through-hole or surface-mount packages with equivalent pinout and electrical characteristics

The MC33063ADR from Texas Instruments meets these substitution criteria with compatible electrical specifications and active product status, though with noted differences in maximum input voltage, switching frequency, and package type.

Parameter Comparison

Engineering Selection Recommendations

The MC33063ADR is the active equivalent substitute for the obsolete RT34063AGN. Both devices share identical core electrical specifications: buck-boost topology, positive or negative adjustable output, 1.5A output current, 1.25V minimum output voltage, and -40°C to 85°C operating temperature range.

Key differences affecting selection:

• Input Voltage: MC33063ADR supports 40V maximum input versus 30V for RT34063AGN. This provides additional design margin for higher input voltage applications.
• Switching Frequency: MC33063ADR operates at 100kHz versus 38kHz for RT34063AGN. Higher switching frequency reduces external component size but may require circuit redesign for EMI and filtering considerations.
• Package Type: RT34063AGN uses through-hole 8-DIP packaging; MC33063ADR uses surface-mount 8-SOIC packaging. PCB layout and assembly process compatibility must be evaluated.
• Compliance: MC33063ADR carries ROHS3 compliance and MSL 1 rating, indicating superior environmental and moisture handling characteristics suitable for modern manufacturing standards.

For designs currently using RT34063AGN, the MC33063ADR provides functional equivalence with enhanced specifications and active product availability. Circuit validation is required to confirm compatibility with the higher switching frequency and different package footprint.

Frequently Asked Questions (FAQ)

Q: Can MC33063ADR directly replace RT34063AGN in existing designs?

A: Electrical substitution is possible due to matching topology, output configuration, voltage range (within limits), and current rating. However, the different switching frequency (100kHz vs. 38kHz) and package type (8-SOIC vs. 8-DIP) require circuit validation and PCB redesign. Pin-to-pin compatibility must be verified against schematic requirements.

Q: What are the implications of the higher switching frequency in MC33063ADR?

A: The 100kHz switching frequency in MC33063ADR versus 38kHz in RT34063AGN affects external component selection, particularly filter inductors and capacitors. Higher frequency allows smaller component values but may introduce different EMI characteristics. Filter design and stability analysis must be performed for the specific application.

Q: Does the 40V maximum input voltage of MC33063ADR provide backward compatibility?

A: Yes. The MC33063ADR's 40V maximum input rating exceeds the RT34063AGN's 30V specification, providing design margin. Applications operating within the original 30V limit will function within the MC33063ADR's rated specifications.

Q: What packaging considerations apply when switching from 8-DIP to 8-SOIC?

A: The transition from through-hole 8-DIP to surface-mount 8-SOIC requires PCB layout redesign, different assembly processes, and updated test fixtures. Pin spacing and footprint dimensions differ significantly. Verify pinout compatibility and confirm mechanical clearance in the target application.

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

A: MC33063ADR is ROHS3 compliant with MSL 1 rating (unlimited moisture exposure), while RT34063AGN shows MSL 3 (168-hour limit). MC33063ADR meets modern environmental and manufacturing standards, making it suitable for current production requirements.

Q: What is the base product number relationship?

A: RT34063AGN is based on the RT34063 series; MC33063ADR is based on the MC33063 series. Both series implement the same buck-boost regulator topology with compatible electrical characteristics, though from different manufacturers with distinct product lines.