RT9214PSP Equivalent & Substitute Parts

Part Overview

The RT9214PSP is a buck regulator positive output step-down DC-DC controller IC manufactured by Richtek USA Inc. in an 8-SOP-EP package. This device functions as a transistor driver for step-down topology applications with a single output phase and 300kHz switching frequency. The RT9214PSP is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production requirements.

Substiute Parts

RT9214PSP

Richtek USA Inc.In Stock: 866RT9214PSP Datasheet

Current PartRFQ

RT8120FGSP

Richtek USA Inc.In Stock: 23546RT8120FGSP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT9214PSP is determined by strict alignment of the following critical parameters:

• Package compatibility: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Functional topology: Buck regulator, positive output, step-down configuration
• Output characteristics: Single output, single phase, transistor driver output type
• Switching frequency: 300kHz operation
• Synchronous rectifier capability: Required
• Temperature range: -40°C ~ 85°C minimum
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The RT8120FGSP meets all substitution criteria as an active product from the same manufacturer with identical package, topology, switching frequency, and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The RT8120FGSP is the qualified substitute for the obsolete RT9214PSP based on the following engineering criteria:

Product Status: The RT8120FGSP is an active product with current manufacturing and supply availability (23,469 pcs in stock), whereas the RT9214PSP is obsolete. This transition is necessary for design continuity and production support.

Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring equivalent environmental and regulatory standing.

Functional Equivalence: Identical package, topology, switching frequency, synchronous rectifier capability, and operating temperature range provide direct functional substitution.

Supply Voltage Range: The RT8120FGSP offers an expanded supply voltage range (3V ~ 13.2V) compared to the RT9214PSP (5V, 12V), providing greater design flexibility while maintaining compatibility with the original specifications.

Maximum Duty Cycle Difference: The RT8120FGSP specifies a maximum duty cycle of 85% versus 100% for the RT9214PSP. Applications requiring 100% duty cycle operation must be evaluated against the RT8120FGSP's 85% maximum specification.

Frequently Asked Questions (FAQ)

Q: Can the RT8120FGSP directly replace the RT9214PSP in existing designs?

A: Yes, for applications operating within the RT8120FGSP's maximum duty cycle of 85%. The identical package, topology, switching frequency, and control features enable direct substitution. Applications requiring 100% duty cycle operation require design review.

Q: Are the package dimensions identical between these parts?

A: Yes. Both devices use the 8-SOIC (0.154", 3.90mm Width) Exposed Pad package, enabling identical PCB footprints and no layout modifications.

Q: What is the difference in supply voltage specifications?

A: The RT9214PSP specifies discrete supply voltages (5V, 12V), while the RT8120FGSP specifies a continuous range (3V ~ 13.2V). The RT8120FGSP's range encompasses the original specifications and extends operational capability.

Q: Are there differences in control features?

A: The RT8120FGSP includes an Enable control feature in addition to Phase Control, whereas the RT9214PSP specifies Phase Control only. This additional feature does not prevent substitution and may provide enhanced design flexibility.

Q: What is the moisture sensitivity level for both devices?

A: Both devices are classified as MSL 3 (168 Hours), indicating identical moisture handling and storage requirements.

Q: Why is the RT9214PSP classified as obsolete?

A: The RT9214PSP is no longer in active production. The RT8120FGSP represents the current active equivalent from Richtek USA Inc. for this product category.