RT9711BGS Equivalent & Substitute Parts

Part Overview

The RT9711BGS is an active power switch IC manufactured by Richtek USA Inc., designed for USB switching applications. This N-channel power switch operates as a 1:1 high-side driver with 1.5A maximum output current and integrated fault protection including current limiting, over-temperature, reverse current, and UVLO monitoring. The device is currently in active production status with RoHS3 compliance and is housed in an 8-SOP package.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified operating parameters, enabling design flexibility and supply chain alternatives.

Substiute Parts

RT9711BGS

Richtek USA Inc.In Stock: 866RT9711BGS Datasheet

Current PartRFQ

MIC2544A-1YM-TR

Microchip TechnologyIn Stock: 1936MIC2544A-1YM-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The MIC2544A-1YM-TR qualifies as a direct substitute for the RT9711BGS based on the following alignment of critical parameters:

• Switch topology: Both devices function as 1:1 N-channel high-side USB switches with identical output configuration
• Current rating: Both support 1.5A maximum output current
• Load voltage range: MIC2544A-1YM-TR operates within 2.7V ~ 5.5V, which encompasses the RT9711BGS range of 2.5V ~ 5.5V
• Package compatibility: Both use 8-SOIC (0.154", 3.90mm Width) surface-mount packaging
• Interface type: Both employ On/Off control with non-inverting input logic
• Regulatory compliance: Both are RoHS3 compliant and REACH unaffected

Substitution is valid where the load voltage minimum of 2.7V meets application requirements, and where the operating temperature range difference is acceptable for the specific use case.

Parameter Comparison

Engineering Selection Recommendations

Both the RT9711BGS and MIC2544A-1YM-TR are active production devices with RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications.

The MIC2544A-1YM-TR presents a lower on-resistance specification (80mOhm typical versus 90mOhm), which may provide marginal thermal benefits in power-dissipation-sensitive applications. The Microchip device carries a superior moisture sensitivity level (MSL 1 versus MSL 3), reducing handling and storage constraints.

The primary design consideration is the load voltage minimum specification: the MIC2544A-1YM-TR operates from 2.7V minimum, whereas the RT9711BGS extends to 2.5V. Applications requiring operation below 2.7V must retain the RT9711BGS. The operating temperature range difference (RT9711BGS to 125°C junction temperature versus MIC2544A-1YM-TR to 85°C ambient) should be evaluated against thermal management and application environment requirements.

Frequently Asked Questions (FAQ)

Q: Can the MIC2544A-1YM-TR replace the RT9711BGS in all applications?

A: Substitution is valid where the application load voltage remains at or above 2.7V and the operating temperature environment does not exceed 85°C ambient. Applications with load voltages below 2.7V or junction temperatures exceeding 85°C require the RT9711BGS.

Q: Are the package dimensions identical between these devices?

A: Both devices use 8-SOIC (0.154", 3.90mm Width) surface-mount packaging with identical footprints. The RT9711BGS is designated as 8-SOP and the MIC2544A-1YM-TR as 8-SOIC; these designations refer to the same physical package form factor.

Q: What is the significance of the on-resistance difference?

A: The MIC2544A-1YM-TR typical on-resistance of 80mOhm versus the RT9711BGS at 90mOhm represents approximately 11% lower resistance. This reduces power dissipation and heat generation proportionally with load current, benefiting thermal performance in current-limited applications.

Q: How do the fault protection features compare?

A: The RT9711BGS includes current limiting (fixed), over-temperature, reverse current, and UVLO protection. The MIC2544A-1YM-TR provides current limiting (adjustable) and over-temperature protection. Applications requiring reverse current or UVLO monitoring must verify the MIC2544A-1YM-TR design integration or retain the RT9711BGS.

Q: What does MSL rating indicate for component handling?

A: MSL (Moisture Sensitivity Level) defines storage and handling requirements. The MIC2544A-1YM-TR at MSL 1 (unlimited shelf life) requires no special moisture control, whereas the RT9711BGS at MSL 3 (168-hour floor life) requires controlled humidity storage and baking procedures before reflow soldering if shelf life is exceeded.