RT7021BGS Equivalent & Substitute Parts

Part Overview

The RT7021BGS is a high-side or low-side gate driver IC manufactured by Richtek USA Inc., designed for driving IGBT and N-Channel MOSFET gates in power management applications. This component operates with independent dual-channel configuration in an 8-SOP surface mount package. The RT7021BGS is currently classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

RT7021BGS

Richtek USA Inc.In Stock: 1025RT7021BGS Datasheet

Current PartRFQ

RT7028BGS

Richtek USA Inc.In Stock: 1008RT7028BGS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT7021BGS is determined by the following critical parameters:

Primary Compatibility Criteria:

• Driven configuration: High-Side or Low-Side capability
• Channel type: Independent dual-channel architecture
• Gate type: IGBT and N-Channel MOSFET support
• Package: 8-SOIC form factor (0.154", 3.90mm Width)
• Input type: Non-Inverting logic

Electrical Performance Criteria:

• Supply voltage range must encompass or overlap with 13V ~ 20V
• Peak output current: Source 300mA, Sink 600mA minimum
• Bootstrap voltage rating: 600V minimum
• Logic voltage thresholds: VIL 0.8V, VIH 2.5V
• Rise/Fall time: 70ns rise, 35ns fall (typical)

Environmental & Compliance Criteria:

• Operating temperature range compatibility
• RoHS3 compliance
• MSL rating: 3 (168 Hours)

The RT7028BGS meets all primary compatibility criteria and qualifies as a direct substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The RT7028BGS is a qualified substitute for the obsolete RT7021BGS based on the following factors:

Functional Equivalence: Both parts share identical gate driver architecture, dual-channel independent configuration, and electrical performance specifications for peak output current, bootstrap voltage, and logic thresholds.

Package Compatibility: Both components utilize the 8-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width), ensuring direct PCB footprint compatibility without layout modifications.

Supply Voltage Consideration: The RT7028BGS supply voltage range (10V ~ 20V) encompasses the RT7021BGS range (13V ~ 20V). Applications operating within 13V ~ 20V will function identically on both parts.

Operating Temperature Range: The RT7021BGS operates to 150°C (junction temperature), while the RT7028BGS operates to 125°C (ambient temperature). Applications requiring operation above 125°C ambient or 150°C junction temperature must evaluate thermal management and derating requirements.

Compliance & Availability: The RT7028BGS maintains ROHS3 compliance and identical MSL rating. As an active product, the RT7028BGS offers superior long-term availability compared to the obsolete RT7021BGS.

Frequently Asked Questions (FAQ)

Q: Can the RT7028BGS directly replace the RT7021BGS on existing PCBs?

A: Yes. Both parts use identical 8-SOIC packaging with matching pinout and electrical specifications for gate drive current, voltage thresholds, and timing characteristics. No PCB modifications are required.

Q: What is the key difference between these two parts?

A: The primary differences are product status and operating temperature range. The RT7021BGS is obsolete with a maximum junction temperature of 150°C, while the RT7028BGS is actively manufactured with a maximum ambient temperature rating of 125°C. The RT7028BGS supply voltage range (10V ~ 20V) is also slightly broader than the RT7021BGS (13V ~ 20V).

Q: Are there any applications where the RT7028BGS cannot substitute for the RT7021BGS?

A: Applications requiring sustained operation above 125°C ambient temperature may require thermal analysis. The RT7021BGS junction temperature rating of 150°C provides additional margin in high-temperature environments. Verify your application's thermal profile against the RT7028BGS derating curves.

Q: Is the RT7028BGS available in the same packaging options?

A: Both parts are supplied in 8-SOP (8-SOIC) surface mount packaging. Packaging format compatibility is confirmed.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RT7021BGS and RT7028BGS are ROHS3 compliant with identical MSL rating of 3 (168 Hours). Compliance documentation is equivalent for both parts.

Q: What supply voltage range should I use for the RT7028BGS?

A: The RT7028BGS operates across 10V ~ 20V. If your application uses 13V ~ 20V (the RT7021BGS range), the RT7028BGS will function identically. The extended lower voltage capability (down to 10V) provides additional design flexibility.