RT9214APS Equivalent & Substitute Parts

Part Overview

The RT9214APS is a buck regulator positive output step-down DC-DC controller IC manufactured by Richtek USA Inc. in an 8-SOP package. This device functions as a transistor driver for step-down topology applications with a single output phase and 100% maximum duty cycle. The RT9214APS is classified as obsolete, making identification of functionally equivalent active alternatives necessary for new designs and ongoing production requirements.

Substiute Parts

RT9214APS

Richtek USA Inc.In Stock: 1476RT9214APS Datasheet

Current PartRFQ

RT8120FGS

Richtek USA Inc.In Stock: 725RT8120FGS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT9214APS is determined by strict alignment of the following critical parameters:

• Topology: Buck (step-down DC-DC controller)
• Output Configuration: Positive output
• Output Type: Transistor driver
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Synchronous Rectifier: Yes
• Switching Frequency: 300kHz
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Supply Voltage Compatibility: Devices must support the required input voltage range

The RT8120FGS meets these core substitution criteria as an active product from the same manufacturer with identical package, topology, switching frequency, synchronous rectifier capability, and operating temperature range. The RT8120FGS provides an extended supply voltage range (3V ~ 13.2V) that encompasses the RT9214APS supply requirements.

Parameter Comparison

Engineering Selection Recommendations

The RT8120FGS is the qualified substitute for the obsolete RT9214APS based on the following engineering criteria:

Product Status & Availability: The RT9214APS is obsolete with no ongoing manufacturing. The RT8120FGS is an active product with current inventory availability (669 pcs in stock), ensuring long-term supply chain continuity.

Compliance & Certifications: Both devices maintain identical RoHS3 compliance and MSL ratings (3, 168 Hours), ensuring equivalent environmental and handling requirements. Both are REACH unaffected.

Electrical & Mechanical Compatibility: The RT8120FGS provides identical package footprint (8-SOIC), switching frequency (300kHz), operating temperature range (-40°C ~ 85°C), and synchronous rectifier capability. The extended supply voltage range (3V ~ 13.2V) of the RT8120FGS fully encompasses the RT9214APS supply requirements (5V, 12V).

Design Consideration: The RT8120FGS specifies a maximum duty cycle of 85% compared to the RT9214APS 100% maximum. Applications requiring duty cycles above 85% require circuit redesign evaluation.

Frequently Asked Questions (FAQ)

Q: Can the RT8120FGS directly replace the RT9214APS in existing designs?

A: The RT8120FGS is mechanically and electrically compatible with the RT9214APS in the 8-SOIC package. However, the lower maximum duty cycle (85% vs. 100%) must be evaluated for your specific application. If your design operates below 85% duty cycle, direct substitution is feasible. Applications requiring higher duty cycles require circuit redesign.

Q: Are the pin configurations identical between RT9214APS and RT8120FGS?

A: Both devices use the 8-SOIC (0.154", 3.90mm Width) package. Detailed pinout verification against the respective datasheets is required to confirm functional pin compatibility for your specific application circuit.

Q: What is the supply voltage compatibility between these devices?

A: The RT9214APS operates at 5V and 12V supply levels. The RT8120FGS accepts a continuous range of 3V ~ 13.2V, which encompasses both specified supply voltages of the RT9214APS. This extended range provides additional design flexibility.

Q: Are there any compliance or environmental differences?

A: Both devices are ROHS3 compliant with identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours). No compliance or environmental handling differences exist between the two devices.

Q: Why is the RT9214APS obsolete?

A: The RT9214APS is classified as obsolete by the manufacturer. The RT8120FGS represents the active equivalent product line from Richtek USA Inc. for new designs and production continuity.