RT9009GMS5 Equivalent & Substitute Parts

Part Overview

The RT9009GMS5 is an active linear voltage regulator IC from Richtek USA Inc., classified as a Power Management (PMIC) component. This positive adjustable regulator delivers up to 2.5A output current with a fixed minimum output of 1.25V and adjustable maximum of 4.5V. The device is housed in a TO-263-6 (D2PAK) surface mount package with 5 leads plus tab configuration. Currently in active production status with 1,812 pieces available in new original inventory, this component is suitable for applications requiring precision voltage regulation in compact form factors. Equivalent and substitute parts are identified for design flexibility, supply chain continuity, and application-specific performance optimization.

Substiute Parts

RT9009GMS5

Richtek USA Inc.In Stock: 1899RT9009GMS5 Datasheet

Current PartRFQ

LD39200DPUR

STMicroelectronicsIn Stock: 23295LD39200DPUR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9009GMS5 are identified based on functional equivalence within the linear voltage regulator category. The primary substitution criteria are:

Core Functional Parameters:

• Output configuration: Positive adjustable voltage regulation
• Output current capability: Minimum 2A (RT9009GMS5 provides 2.5A)
• Input voltage tolerance: Maximum input voltage ≥5.5V
• Output voltage adjustability: Range encompassing 1.25V to 4.5V
• Dropout voltage performance: Critical for low-headroom applications
• Surface mount packaging: Compatibility with PCB assembly processes
• Protection features: Over current and over temperature protection
• Active product status: Ongoing manufacturer support and availability

The LD39200DPUR from STMicroelectronics meets these criteria as a direct functional substitute, offering comparable output current (2A), adjustable output voltage architecture, and enhanced input voltage tolerance (6V maximum). Both devices maintain active production status and full RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

RT9009GMS5 Selection Criteria:

• Applications requiring TO-263-6 (D2PAK) package footprint compatibility
• Systems with 2.5A output current demand
• Operating environments within -40°C to 85°C range
• Designs utilizing Richtek component ecosystems

LD39200DPUR Selection Criteria:

• Applications compatible with 8-VDFN (4x4) package footprint
• Systems with 2A output current requirement
• Extended operating temperature range (-40°C to 125°C) beneficial for industrial applications
• Designs requiring lower dropout voltage (0.25V vs. 0.79V) for reduced power dissipation
• Applications utilizing Power Good output signal for system monitoring
• Reverse polarity protection requirement
• Lower quiescent current (300 µA vs. 500 µA) for battery-powered applications
• Unlimited moisture sensitivity level (MSL 1) for extended storage and handling

Both devices maintain active production status, ROHS3 compliance, and equivalent functional performance within their respective package constraints. Package selection is the primary differentiator between these alternatives.

Frequently Asked Questions (FAQ)

Q: Can the LD39200DPUR directly replace the RT9009GMS5 on an existing PCB?

A: Direct PCB replacement is not possible due to different package types. The RT9009GMS5 uses TO-263-6 (D2PAK) with 5 leads plus tab, while the LD39200DPUR uses 8-VDFN (4x4) with exposed pad. PCB layout redesign is required for substitution.

Q: What are the key functional differences between these parts?

A: Both are positive adjustable linear regulators with comparable output current capability (2.5A vs. 2A). The LD39200DPUR offers superior dropout voltage performance (0.25V vs. 0.79V), extended temperature range (-40°C to 125°C vs. -40°C to 85°C), additional control features (Power Good output), reverse polarity protection, and lower quiescent current (300 µA vs. 500 µA).

Q: Are there output voltage range compatibility concerns?

A: The LD39200DPUR supports a wider output voltage range (0.5V to 5.75V) compared to the RT9009GMS5 (1.25V to 4.5V). Applications requiring output voltages below 1.25V or above 4.5V must use the LD39200DPUR. Applications within the 1.25V to 4.5V range are compatible with both devices.

Q: What is the impact of different quiescent current specifications?

A: The LD39200DPUR draws 300 µA quiescent current versus 500 µA for the RT9009GMS5. In battery-powered or low-power standby applications, the LD39200DPUR provides approximately 40% lower standby power consumption.

Q: How do the protection features differ?

A: Both devices include over current and over temperature protection. The LD39200DPUR adds reverse polarity protection, providing additional circuit safeguarding in applications with potential input polarity reversal risk.

Q: What are the moisture sensitivity implications?

A: The RT9009GMS5 has MSL 3 rating (168-hour moisture limit), requiring controlled storage and handling. The LD39200DPUR has MSL 1 rating (unlimited moisture exposure), allowing extended storage without desiccant requirements and reducing handling constraints.

Q: Are both parts suitable for industrial temperature applications?

A: The RT9009GMS5 operates within -40°C to 85°C. The LD39200DPUR extends to -40°C to 125°C, making it suitable for industrial and automotive applications requiring higher temperature tolerance.