RT8101AGSP Equivalent & Substitute Parts

Part Overview

The RT8101AGSP is an active Buck Regulator Positive Output Step-Down DC-DC Controller IC manufactured by Richtek USA Inc. This component functions as a transistor driver for step-down voltage conversion applications, featuring a single output phase with synchronous rectification capability. The part is currently in active production status with 3670 units in stock inventory.

Alternative components may be required due to supply constraints, design optimization needs, or application-specific performance requirements that differ from the original specification.

Substiute Parts

RT8101AGSP

Richtek USA Inc.In Stock: 3736RT8101AGSP Datasheet

Current PartRFQ

ISL6840IBZ-T

Renesas Electronics CorporationIn Stock: 4274ISL6840IBZ-T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT8101AGSP is determined by the following critical parameters:

• Topology & Function: The substitute must support step-down (buck) conversion or multi-topology capability including buck operation
• Output Configuration: Positive output configuration required
• Package Compatibility: 8-pin SOIC package with 0.154" (3.90mm) width for direct PCB footprint compatibility
• Mounting Type: Surface mount technology
• Supply Voltage Range: Must accommodate the 10.8V ~ 13.2V input specification
• Synchronous Rectification: Preferred for efficiency matching
• Regulatory Compliance: ROHS3 compliance and equivalent environmental certifications

The ISL6840IBZ-T qualifies as a substitute based on shared package geometry, surface mount configuration, positive output capability, synchronous rectification support, and equivalent regulatory compliance. However, functional differences exist in topology support and operating parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the RT8101AGSP and ISL6840IBZ-T maintain active production status with equivalent ROHS3 compliance and MSL ratings. Selection between these components should be based on application-specific topology requirements.

The RT8101AGSP is optimized for dedicated buck (step-down) conversion with 100% maximum duty cycle capability and 600kHz switching frequency. The ISL6840IBZ-T provides multi-topology flexibility supporting boost and flyback topologies with higher switching frequency capability (up to 2MHz) and extended operating temperature range (-40°C ~ 105°C).

Package compatibility is confirmed for both components in 8-SOIC form factor with 0.154" width, enabling direct PCB footprint substitution. Both devices feature synchronous rectification and positive output configuration.

Frequently Asked Questions (FAQ)

Q: Can the ISL6840IBZ-T directly replace the RT8101AGSP in a buck converter application?

A: Physical package compatibility exists (8-SOIC, 0.154" width), and both devices support positive output with synchronous rectification. However, the ISL6840IBZ-T is designed for boost and flyback topologies. Application-specific circuit design validation is required to confirm functional compatibility in buck converter configurations.

Q: What are the key differences in electrical specifications?

A: The RT8101AGSP operates at 600kHz switching frequency with 100% maximum duty cycle and 10.8V ~ 13.2V supply range. The ISL6840IBZ-T supports up to 2MHz switching frequency with 96% maximum duty cycle and broader 7.5V ~ 14V supply range. Operating temperature ranges differ: RT8101AGSP (-40°C ~ 85°C) versus ISL6840IBZ-T (-40°C ~ 105°C).

Q: Are both parts RoHS compliant?

A: Yes. Both the RT8101AGSP and ISL6840IBZ-T are ROHS3 compliant with equivalent MSL ratings of 3 (168 Hours).

Q: What is the significance of the exposed pad on the RT8101AGSP package?

A: The exposed pad on the RT8101AGSP (8-SOP-EP) provides enhanced thermal dissipation compared to standard 8-SOIC packages. The ISL6840IBZ-T uses standard 8-SOIC packaging without exposed pad, which may affect thermal performance in high-power applications.

Q: Can supply voltage differences affect substitution feasibility?

A: The RT8101AGSP requires 10.8V ~ 13.2V supply input, while the ISL6840IBZ-T accepts 7.5V ~ 14V. The ISL6840IBZ-T's broader range provides greater flexibility for applications with variable input voltages, but circuit design must account for topology differences.